/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.content;
import static android.Manifest.permission.INTERACT_ACROSS_USERS;
import static android.app.AppOpsManager.MODE_ALLOWED;
import static android.app.AppOpsManager.MODE_ERRORED;
import static android.app.AppOpsManager.MODE_IGNORED;
import static android.content.pm.PackageManager.PERMISSION_GRANTED;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.app.AppOpsManager;
import android.content.pm.PathPermission;
import android.content.pm.ProviderInfo;
import android.content.res.AssetFileDescriptor;
import android.content.res.Configuration;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.database.SQLException;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Binder;
import android.os.Bundle;
import android.os.CancellationSignal;
import android.os.IBinder;
import android.os.ICancellationSignal;
import android.os.ParcelFileDescriptor;
import android.os.Process;
import android.os.RemoteException;
import android.os.UserHandle;
import android.os.storage.StorageManager;
import android.text.TextUtils;
import android.util.Log;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
/**
* Content providers are one of the primary building blocks of Android applications, providing
* content to applications. They encapsulate data and provide it to applications through the single
* {@link ContentResolver} interface. A content provider is only required if you need to share
* data between multiple applications. For example, the contacts data is used by multiple
* applications and must be stored in a content provider. If you don't need to share data amongst
* multiple applications you can use a database directly via
* {@link android.database.sqlite.SQLiteDatabase}.
*
* <p>When a request is made via
* a {@link ContentResolver} the system inspects the authority of the given URI and passes the
* request to the content provider registered with the authority. The content provider can interpret
* the rest of the URI however it wants. The {@link UriMatcher} class is helpful for parsing
* URIs.</p>
*
* <p>The primary methods that need to be implemented are:
* <ul>
* <li>{@link #onCreate} which is called to initialize the provider</li>
* <li>{@link #query} which returns data to the caller</li>
* <li>{@link #insert} which inserts new data into the content provider</li>
* <li>{@link #update} which updates existing data in the content provider</li>
* <li>{@link #delete} which deletes data from the content provider</li>
* <li>{@link #getType} which returns the MIME type of data in the content provider</li>
* </ul></p>
*
* <p class="caution">Data access methods (such as {@link #insert} and
* {@link #update}) may be called from many threads at once, and must be thread-safe.
* Other methods (such as {@link #onCreate}) are only called from the application
* main thread, and must avoid performing lengthy operations. See the method
* descriptions for their expected thread behavior.</p>
*
* <p>Requests to {@link ContentResolver} are automatically forwarded to the appropriate
* ContentProvider instance, so subclasses don't have to worry about the details of
* cross-process calls.</p>
*
* <div class="special reference">
* <h3>Developer Guides</h3>
* <p>For more information about using content providers, read the
* <a href="{@docRoot}guide/topics/providers/content-providers.html">Content Providers</a>
* developer guide.</p>
*/
public abstract class ContentProvider implements ComponentCallbacks2 {
private static final String TAG = "ContentProvider";
/*
* Note: if you add methods to ContentProvider, you must add similar methods to
* MockContentProvider.
*/
private Context mContext = null;
private int mMyUid;
// Since most Providers have only one authority, we keep both a String and a String[] to improve
// performance.
private String mAuthority;
private String[] mAuthorities;
private String mReadPermission;
private String mWritePermission;
private PathPermission[] mPathPermissions;
private boolean mExported;
private boolean mNoPerms;
private boolean mSingleUser;
private final ThreadLocal<String> mCallingPackage = new ThreadLocal<>();
private Transport mTransport = new Transport();
/**
* Construct a ContentProvider instance. Content providers must be
* <a href="{@docRoot}guide/topics/manifest/provider-element.html">declared
* in the manifest</a>, accessed with {@link ContentResolver}, and created
* automatically by the system, so applications usually do not create
* ContentProvider instances directly.
*
* <p>At construction time, the object is uninitialized, and most fields and
* methods are unavailable. Subclasses should initialize themselves in
* {@link #onCreate}, not the constructor.
*
* <p>Content providers are created on the application main thread at
* application launch time. The constructor must not perform lengthy
* operations, or application startup will be delayed.
*/
public ContentProvider() {
}
/**
* Constructor just for mocking.
*
* @param context A Context object which should be some mock instance (like the
* instance of {@link android.test.mock.MockContext}).
* @param readPermission The read permision you want this instance should have in the
* test, which is available via {@link #getReadPermission()}.
* @param writePermission The write permission you want this instance should have
* in the test, which is available via {@link #getWritePermission()}.
* @param pathPermissions The PathPermissions you want this instance should have
* in the test, which is available via {@link #getPathPermissions()}.
* @hide
*/
public ContentProvider(
Context context,
String readPermission,
String writePermission,
PathPermission[] pathPermissions) {
mContext = context;
mReadPermission = readPermission;
mWritePermission = writePermission;
mPathPermissions = pathPermissions;
}
/**
* Given an IContentProvider, try to coerce it back to the real
* ContentProvider object if it is running in the local process. This can
* be used if you know you are running in the same process as a provider,
* and want to get direct access to its implementation details. Most
* clients should not nor have a reason to use it.
*
* @param abstractInterface The ContentProvider interface that is to be
* coerced.
* @return If the IContentProvider is non-{@code null} and local, returns its actual
* ContentProvider instance. Otherwise returns {@code null}.
* @hide
*/
public static ContentProvider coerceToLocalContentProvider(
IContentProvider abstractInterface) {
if (abstractInterface instanceof Transport) {
return ((Transport)abstractInterface).getContentProvider();
}
return null;
}
/**
* Binder object that deals with remoting.
*
* @hide
*/
class Transport extends ContentProviderNative {
AppOpsManager mAppOpsManager = null;
int mReadOp = AppOpsManager.OP_NONE;
int mWriteOp = AppOpsManager.OP_NONE;
ContentProvider getContentProvider() {
return ContentProvider.this;
}
@Override
public String getProviderName() {
return getContentProvider().getClass().getName();
}
@Override
public Cursor query(String callingPkg, Uri uri, @Nullable String[] projection,
@Nullable Bundle queryArgs, @Nullable ICancellationSignal cancellationSignal) {
validateIncomingUri(uri);
uri = maybeGetUriWithoutUserId(uri);
if (enforceReadPermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
// The caller has no access to the data, so return an empty cursor with
// the columns in the requested order. The caller may ask for an invalid
// column and we would not catch that but this is not a problem in practice.
// We do not call ContentProvider#query with a modified where clause since
// the implementation is not guaranteed to be backed by a SQL database, hence
// it may not handle properly the tautology where clause we would have created.
if (projection != null) {
return new MatrixCursor(projection, 0);
}
// Null projection means all columns but we have no idea which they are.
// However, the caller may be expecting to access them my index. Hence,
// we have to execute the query as if allowed to get a cursor with the
// columns. We then use the column names to return an empty cursor.
Cursor cursor = ContentProvider.this.query(
uri, projection, queryArgs,
CancellationSignal.fromTransport(cancellationSignal));
if (cursor == null) {
return null;
}
// Return an empty cursor for all columns.
return new MatrixCursor(cursor.getColumnNames(), 0);
}
final String original = setCallingPackage(callingPkg);
try {
return ContentProvider.this.query(
uri, projection, queryArgs,
CancellationSignal.fromTransport(cancellationSignal));
} finally {
setCallingPackage(original);
}
}
@Override
public String getType(Uri uri) {
validateIncomingUri(uri);
uri = maybeGetUriWithoutUserId(uri);
return ContentProvider.this.getType(uri);
}
@Override
public Uri insert(String callingPkg, Uri uri, ContentValues initialValues) {
validateIncomingUri(uri);
int userId = getUserIdFromUri(uri);
uri = maybeGetUriWithoutUserId(uri);
if (enforceWritePermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
return rejectInsert(uri, initialValues);
}
final String original = setCallingPackage(callingPkg);
try {
return maybeAddUserId(ContentProvider.this.insert(uri, initialValues), userId);
} finally {
setCallingPackage(original);
}
}
@Override
public int bulkInsert(String callingPkg, Uri uri, ContentValues[] initialValues) {
validateIncomingUri(uri);
uri = maybeGetUriWithoutUserId(uri);
if (enforceWritePermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
return 0;
}
final String original = setCallingPackage(callingPkg);
try {
return ContentProvider.this.bulkInsert(uri, initialValues);
} finally {
setCallingPackage(original);
}
}
@Override
public ContentProviderResult[] applyBatch(String callingPkg,
ArrayList<ContentProviderOperation> operations)
throws OperationApplicationException {
int numOperations = operations.size();
final int[] userIds = new int[numOperations];
for (int i = 0; i < numOperations; i++) {
ContentProviderOperation operation = operations.get(i);
Uri uri = operation.getUri();
validateIncomingUri(uri);
userIds[i] = getUserIdFromUri(uri);
if (userIds[i] != UserHandle.USER_CURRENT) {
// Removing the user id from the uri.
operation = new ContentProviderOperation(operation, true);
operations.set(i, operation);
}
if (operation.isReadOperation()) {
if (enforceReadPermission(callingPkg, uri, null)
!= AppOpsManager.MODE_ALLOWED) {
throw new OperationApplicationException("App op not allowed", 0);
}
}
if (operation.isWriteOperation()) {
if (enforceWritePermission(callingPkg, uri, null)
!= AppOpsManager.MODE_ALLOWED) {
throw new OperationApplicationException("App op not allowed", 0);
}
}
}
final String original = setCallingPackage(callingPkg);
try {
ContentProviderResult[] results = ContentProvider.this.applyBatch(operations);
if (results != null) {
for (int i = 0; i < results.length ; i++) {
if (userIds[i] != UserHandle.USER_CURRENT) {
// Adding the userId to the uri.
results[i] = new ContentProviderResult(results[i], userIds[i]);
}
}
}
return results;
} finally {
setCallingPackage(original);
}
}
@Override
public int delete(String callingPkg, Uri uri, String selection, String[] selectionArgs) {
validateIncomingUri(uri);
uri = maybeGetUriWithoutUserId(uri);
if (enforceWritePermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
return 0;
}
final String original = setCallingPackage(callingPkg);
try {
return ContentProvider.this.delete(uri, selection, selectionArgs);
} finally {
setCallingPackage(original);
}
}
@Override
public int update(String callingPkg, Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
validateIncomingUri(uri);
uri = maybeGetUriWithoutUserId(uri);
if (enforceWritePermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
return 0;
}
final String original = setCallingPackage(callingPkg);
try {
return ContentProvider.this.update(uri, values, selection, selectionArgs);
} finally {
setCallingPackage(original);
}
}
@Override
public ParcelFileDescriptor openFile(
String callingPkg, Uri uri, String mode, ICancellationSignal cancellationSignal,
IBinder callerToken) throws FileNotFoundException {
validateIncomingUri(uri);
uri = maybeGetUriWithoutUserId(uri);
enforceFilePermission(callingPkg, uri, mode, callerToken);
final String original = setCallingPackage(callingPkg);
try {
return ContentProvider.this.openFile(
uri, mode, CancellationSignal.fromTransport(cancellationSignal));
} finally {
setCallingPackage(original);
}
}
@Override
public AssetFileDescriptor openAssetFile(
String callingPkg, Uri uri, String mode, ICancellationSignal cancellationSignal)
throws FileNotFoundException {
validateIncomingUri(uri);
uri = maybeGetUriWithoutUserId(uri);
enforceFilePermission(callingPkg, uri, mode, null);
final String original = setCallingPackage(callingPkg);
try {
return ContentProvider.this.openAssetFile(
uri, mode, CancellationSignal.fromTransport(cancellationSignal));
} finally {
setCallingPackage(original);
}
}
@Override
public Bundle call(
String callingPkg, String method, @Nullable String arg, @Nullable Bundle extras) {
Bundle.setDefusable(extras, true);
final String original = setCallingPackage(callingPkg);
try {
return ContentProvider.this.call(method, arg, extras);
} finally {
setCallingPackage(original);
}
}
@Override
public String[] getStreamTypes(Uri uri, String mimeTypeFilter) {
validateIncomingUri(uri);
uri = maybeGetUriWithoutUserId(uri);
return ContentProvider.this.getStreamTypes(uri, mimeTypeFilter);
}
@Override
public AssetFileDescriptor openTypedAssetFile(String callingPkg, Uri uri, String mimeType,
Bundle opts, ICancellationSignal cancellationSignal) throws FileNotFoundException {
Bundle.setDefusable(opts, true);
validateIncomingUri(uri);
uri = maybeGetUriWithoutUserId(uri);
enforceFilePermission(callingPkg, uri, "r", null);
final String original = setCallingPackage(callingPkg);
try {
return ContentProvider.this.openTypedAssetFile(
uri, mimeType, opts, CancellationSignal.fromTransport(cancellationSignal));
} finally {
setCallingPackage(original);
}
}
@Override
public ICancellationSignal createCancellationSignal() {
return CancellationSignal.createTransport();
}
@Override
public Uri canonicalize(String callingPkg, Uri uri) {
validateIncomingUri(uri);
int userId = getUserIdFromUri(uri);
uri = getUriWithoutUserId(uri);
if (enforceReadPermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
return null;
}
final String original = setCallingPackage(callingPkg);
try {
return maybeAddUserId(ContentProvider.this.canonicalize(uri), userId);
} finally {
setCallingPackage(original);
}
}
@Override
public Uri uncanonicalize(String callingPkg, Uri uri) {
validateIncomingUri(uri);
int userId = getUserIdFromUri(uri);
uri = getUriWithoutUserId(uri);
if (enforceReadPermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
return null;
}
final String original = setCallingPackage(callingPkg);
try {
return maybeAddUserId(ContentProvider.this.uncanonicalize(uri), userId);
} finally {
setCallingPackage(original);
}
}
@Override
public boolean refresh(String callingPkg, Uri uri, Bundle args,
ICancellationSignal cancellationSignal) throws RemoteException {
validateIncomingUri(uri);
uri = getUriWithoutUserId(uri);
if (enforceReadPermission(callingPkg, uri, null) != AppOpsManager.MODE_ALLOWED) {
return false;
}
final String original = setCallingPackage(callingPkg);
try {
return ContentProvider.this.refresh(uri, args,
CancellationSignal.fromTransport(cancellationSignal));
} finally {
setCallingPackage(original);
}
}
private void enforceFilePermission(String callingPkg, Uri uri, String mode,
IBinder callerToken) throws FileNotFoundException, SecurityException {
if (mode != null && mode.indexOf('w') != -1) {
if (enforceWritePermission(callingPkg, uri, callerToken)
!= AppOpsManager.MODE_ALLOWED) {
throw new FileNotFoundException("App op not allowed");
}
} else {
if (enforceReadPermission(callingPkg, uri, callerToken)
!= AppOpsManager.MODE_ALLOWED) {
throw new FileNotFoundException("App op not allowed");
}
}
}
private int enforceReadPermission(String callingPkg, Uri uri, IBinder callerToken)
throws SecurityException {
final int mode = enforceReadPermissionInner(uri, callingPkg, callerToken);
if (mode != MODE_ALLOWED) {
return mode;
}
if (mReadOp != AppOpsManager.OP_NONE) {
return mAppOpsManager.noteProxyOp(mReadOp, callingPkg);
}
return AppOpsManager.MODE_ALLOWED;
}
private int enforceWritePermission(String callingPkg, Uri uri, IBinder callerToken)
throws SecurityException {
final int mode = enforceWritePermissionInner(uri, callingPkg, callerToken);
if (mode != MODE_ALLOWED) {
return mode;
}
if (mWriteOp != AppOpsManager.OP_NONE) {
return mAppOpsManager.noteProxyOp(mWriteOp, callingPkg);
}
return AppOpsManager.MODE_ALLOWED;
}
}
boolean checkUser(int pid, int uid, Context context) {
return UserHandle.getUserId(uid) == context.getUserId()
|| mSingleUser
|| context.checkPermission(INTERACT_ACROSS_USERS, pid, uid)
== PERMISSION_GRANTED;
}
/**
* Verify that calling app holds both the given permission and any app-op
* associated with that permission.
*/
private int checkPermissionAndAppOp(String permission, String callingPkg,
IBinder callerToken) {
if (getContext().checkPermission(permission, Binder.getCallingPid(), Binder.getCallingUid(),
callerToken) != PERMISSION_GRANTED) {
return MODE_ERRORED;
}
final int permOp = AppOpsManager.permissionToOpCode(permission);
if (permOp != AppOpsManager.OP_NONE) {
return mTransport.mAppOpsManager.noteProxyOp(permOp, callingPkg);
}
return MODE_ALLOWED;
}
/** {@hide} */
protected int enforceReadPermissionInner(Uri uri, String callingPkg, IBinder callerToken)
throws SecurityException {
final Context context = getContext();
final int pid = Binder.getCallingPid();
final int uid = Binder.getCallingUid();
String missingPerm = null;
int strongestMode = MODE_ALLOWED;
if (UserHandle.isSameApp(uid, mMyUid)) {
return MODE_ALLOWED;
}
if (mExported && checkUser(pid, uid, context)) {
final String componentPerm = getReadPermission();
if (componentPerm != null) {
final int mode = checkPermissionAndAppOp(componentPerm, callingPkg, callerToken);
if (mode == MODE_ALLOWED) {
return MODE_ALLOWED;
} else {
missingPerm = componentPerm;
strongestMode = Math.max(strongestMode, mode);
}
}
// track if unprotected read is allowed; any denied
// <path-permission> below removes this ability
boolean allowDefaultRead = (componentPerm == null);
final PathPermission[] pps = getPathPermissions();
if (pps != null) {
final String path = uri.getPath();
for (PathPermission pp : pps) {
final String pathPerm = pp.getReadPermission();
if (pathPerm != null && pp.match(path)) {
final int mode = checkPermissionAndAppOp(pathPerm, callingPkg, callerToken);
if (mode == MODE_ALLOWED) {
return MODE_ALLOWED;
} else {
// any denied <path-permission> means we lose
// default <provider> access.
allowDefaultRead = false;
missingPerm = pathPerm;
strongestMode = Math.max(strongestMode, mode);
}
}
}
}
// if we passed <path-permission> checks above, and no default
// <provider> permission, then allow access.
if (allowDefaultRead) return MODE_ALLOWED;
}
// last chance, check against any uri grants
final int callingUserId = UserHandle.getUserId(uid);
final Uri userUri = (mSingleUser && !UserHandle.isSameUser(mMyUid, uid))
? maybeAddUserId(uri, callingUserId) : uri;
if (context.checkUriPermission(userUri, pid, uid, Intent.FLAG_GRANT_READ_URI_PERMISSION,
callerToken) == PERMISSION_GRANTED) {
return MODE_ALLOWED;
}
// If the worst denial we found above was ignored, then pass that
// ignored through; otherwise we assume it should be a real error below.
if (strongestMode == MODE_IGNORED) {
return MODE_IGNORED;
}
final String suffix;
if (android.Manifest.permission.MANAGE_DOCUMENTS.equals(mReadPermission)) {
suffix = " requires that you obtain access using ACTION_OPEN_DOCUMENT or related APIs";
} else if (mExported) {
suffix = " requires " + missingPerm + ", or grantUriPermission()";
} else {
suffix = " requires the provider be exported, or grantUriPermission()";
}
throw new SecurityException("Permission Denial: reading "
+ ContentProvider.this.getClass().getName() + " uri " + uri + " from pid=" + pid
+ ", uid=" + uid + suffix);
}
/** {@hide} */
protected int enforceWritePermissionInner(Uri uri, String callingPkg, IBinder callerToken)
throws SecurityException {
final Context context = getContext();
final int pid = Binder.getCallingPid();
final int uid = Binder.getCallingUid();
String missingPerm = null;
int strongestMode = MODE_ALLOWED;
if (UserHandle.isSameApp(uid, mMyUid)) {
return MODE_ALLOWED;
}
if (mExported && checkUser(pid, uid, context)) {
final String componentPerm = getWritePermission();
if (componentPerm != null) {
final int mode = checkPermissionAndAppOp(componentPerm, callingPkg, callerToken);
if (mode == MODE_ALLOWED) {
return MODE_ALLOWED;
} else {
missingPerm = componentPerm;
strongestMode = Math.max(strongestMode, mode);
}
}
// track if unprotected write is allowed; any denied
// <path-permission> below removes this ability
boolean allowDefaultWrite = (componentPerm == null);
final PathPermission[] pps = getPathPermissions();
if (pps != null) {
final String path = uri.getPath();
for (PathPermission pp : pps) {
final String pathPerm = pp.getWritePermission();
if (pathPerm != null && pp.match(path)) {
final int mode = checkPermissionAndAppOp(pathPerm, callingPkg, callerToken);
if (mode == MODE_ALLOWED) {
return MODE_ALLOWED;
} else {
// any denied <path-permission> means we lose
// default <provider> access.
allowDefaultWrite = false;
missingPerm = pathPerm;
strongestMode = Math.max(strongestMode, mode);
}
}
}
}
// if we passed <path-permission> checks above, and no default
// <provider> permission, then allow access.
if (allowDefaultWrite) return MODE_ALLOWED;
}
// last chance, check against any uri grants
if (context.checkUriPermission(uri, pid, uid, Intent.FLAG_GRANT_WRITE_URI_PERMISSION,
callerToken) == PERMISSION_GRANTED) {
return MODE_ALLOWED;
}
// If the worst denial we found above was ignored, then pass that
// ignored through; otherwise we assume it should be a real error below.
if (strongestMode == MODE_IGNORED) {
return MODE_IGNORED;
}
final String failReason = mExported
? " requires " + missingPerm + ", or grantUriPermission()"
: " requires the provider be exported, or grantUriPermission()";
throw new SecurityException("Permission Denial: writing "
+ ContentProvider.this.getClass().getName() + " uri " + uri + " from pid=" + pid
+ ", uid=" + uid + failReason);
}
/**
* Retrieves the Context this provider is running in. Only available once
* {@link #onCreate} has been called -- this will return {@code null} in the
* constructor.
*/
public final @Nullable Context getContext() {
return mContext;
}
/**
* Set the calling package, returning the current value (or {@code null})
* which can be used later to restore the previous state.
*/
private String setCallingPackage(String callingPackage) {
final String original = mCallingPackage.get();
mCallingPackage.set(callingPackage);
return original;
}
/**
* Return the package name of the caller that initiated the request being
* processed on the current thread. The returned package will have been
* verified to belong to the calling UID. Returns {@code null} if not
* currently processing a request.
* <p>
* This will always return {@code null} when processing
* {@link #getType(Uri)} or {@link #getStreamTypes(Uri, String)} requests.
*
* @see Binder#getCallingUid()
* @see Context#grantUriPermission(String, Uri, int)
* @throws SecurityException if the calling package doesn't belong to the
* calling UID.
*/
public final @Nullable String getCallingPackage() {
final String pkg = mCallingPackage.get();
if (pkg != null) {
mTransport.mAppOpsManager.checkPackage(Binder.getCallingUid(), pkg);
}
return pkg;
}
/**
* Change the authorities of the ContentProvider.
* This is normally set for you from its manifest information when the provider is first
* created.
* @hide
* @param authorities the semi-colon separated authorities of the ContentProvider.
*/
protected final void setAuthorities(String authorities) {
if (authorities != null) {
if (authorities.indexOf(';') == -1) {
mAuthority = authorities;
mAuthorities = null;
} else {
mAuthority = null;
mAuthorities = authorities.split(";");
}
}
}
/** @hide */
protected final boolean matchesOurAuthorities(String authority) {
if (mAuthority != null) {
return mAuthority.equals(authority);
}
if (mAuthorities != null) {
int length = mAuthorities.length;
for (int i = 0; i < length; i++) {
if (mAuthorities[i].equals(authority)) return true;
}
}
return false;
}
/**
* Change the permission required to read data from the content
* provider. This is normally set for you from its manifest information
* when the provider is first created.
*
* @param permission Name of the permission required for read-only access.
*/
protected final void setReadPermission(@Nullable String permission) {
mReadPermission = permission;
}
/**
* Return the name of the permission required for read-only access to
* this content provider. This method can be called from multiple
* threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*/
public final @Nullable String getReadPermission() {
return mReadPermission;
}
/**
* Change the permission required to read and write data in the content
* provider. This is normally set for you from its manifest information
* when the provider is first created.
*
* @param permission Name of the permission required for read/write access.
*/
protected final void setWritePermission(@Nullable String permission) {
mWritePermission = permission;
}
/**
* Return the name of the permission required for read/write access to
* this content provider. This method can be called from multiple
* threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*/
public final @Nullable String getWritePermission() {
return mWritePermission;
}
/**
* Change the path-based permission required to read and/or write data in
* the content provider. This is normally set for you from its manifest
* information when the provider is first created.
*
* @param permissions Array of path permission descriptions.
*/
protected final void setPathPermissions(@Nullable PathPermission[] permissions) {
mPathPermissions = permissions;
}
/**
* Return the path-based permissions required for read and/or write access to
* this content provider. This method can be called from multiple
* threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*/
public final @Nullable PathPermission[] getPathPermissions() {
return mPathPermissions;
}
/** @hide */
public final void setAppOps(int readOp, int writeOp) {
if (!mNoPerms) {
mTransport.mReadOp = readOp;
mTransport.mWriteOp = writeOp;
}
}
/** @hide */
public AppOpsManager getAppOpsManager() {
return mTransport.mAppOpsManager;
}
/**
* Implement this to initialize your content provider on startup.
* This method is called for all registered content providers on the
* application main thread at application launch time. It must not perform
* lengthy operations, or application startup will be delayed.
*
* <p>You should defer nontrivial initialization (such as opening,
* upgrading, and scanning databases) until the content provider is used
* (via {@link #query}, {@link #insert}, etc). Deferred initialization
* keeps application startup fast, avoids unnecessary work if the provider
* turns out not to be needed, and stops database errors (such as a full
* disk) from halting application launch.
*
* <p>If you use SQLite, {@link android.database.sqlite.SQLiteOpenHelper}
* is a helpful utility class that makes it easy to manage databases,
* and will automatically defer opening until first use. If you do use
* SQLiteOpenHelper, make sure to avoid calling
* {@link android.database.sqlite.SQLiteOpenHelper#getReadableDatabase} or
* {@link android.database.sqlite.SQLiteOpenHelper#getWritableDatabase}
* from this method. (Instead, override
* {@link android.database.sqlite.SQLiteOpenHelper#onOpen} to initialize the
* database when it is first opened.)
*
* @return true if the provider was successfully loaded, false otherwise
*/
public abstract boolean onCreate();
/**
* {@inheritDoc}
* This method is always called on the application main thread, and must
* not perform lengthy operations.
*
* <p>The default content provider implementation does nothing.
* Override this method to take appropriate action.
* (Content providers do not usually care about things like screen
* orientation, but may want to know about locale changes.)
*/
@Override
public void onConfigurationChanged(Configuration newConfig) {
}
/**
* {@inheritDoc}
* This method is always called on the application main thread, and must
* not perform lengthy operations.
*
* <p>The default content provider implementation does nothing.
* Subclasses may override this method to take appropriate action.
*/
@Override
public void onLowMemory() {
}
@Override
public void onTrimMemory(int level) {
}
/**
* Implement this to handle query requests from clients.
*
* <p>Apps targeting {@link android.os.Build.VERSION_CODES#O} or higher should override
* {@link #query(Uri, String[], Bundle, CancellationSignal)} and provide a stub
* implementation of this method.
*
* <p>This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
* <p>
* Example client call:<p>
* <pre>// Request a specific record.
* Cursor managedCursor = managedQuery(
ContentUris.withAppendedId(Contacts.People.CONTENT_URI, 2),
projection, // Which columns to return.
null, // WHERE clause.
null, // WHERE clause value substitution
People.NAME + " ASC"); // Sort order.</pre>
* Example implementation:<p>
* <pre>// SQLiteQueryBuilder is a helper class that creates the
// proper SQL syntax for us.
SQLiteQueryBuilder qBuilder = new SQLiteQueryBuilder();
// Set the table we're querying.
qBuilder.setTables(DATABASE_TABLE_NAME);
// If the query ends in a specific record number, we're
// being asked for a specific record, so set the
// WHERE clause in our query.
if((URI_MATCHER.match(uri)) == SPECIFIC_MESSAGE){
qBuilder.appendWhere("_id=" + uri.getPathLeafId());
}
// Make the query.
Cursor c = qBuilder.query(mDb,
projection,
selection,
selectionArgs,
groupBy,
having,
sortOrder);
c.setNotificationUri(getContext().getContentResolver(), uri);
return c;</pre>
*
* @param uri The URI to query. This will be the full URI sent by the client;
* if the client is requesting a specific record, the URI will end in a record number
* that the implementation should parse and add to a WHERE or HAVING clause, specifying
* that _id value.
* @param projection The list of columns to put into the cursor. If
* {@code null} all columns are included.
* @param selection A selection criteria to apply when filtering rows.
* If {@code null} then all rows are included.
* @param selectionArgs You may include ?s in selection, which will be replaced by
* the values from selectionArgs, in order that they appear in the selection.
* The values will be bound as Strings.
* @param sortOrder How the rows in the cursor should be sorted.
* If {@code null} then the provider is free to define the sort order.
* @return a Cursor or {@code null}.
*/
public abstract @Nullable Cursor query(@NonNull Uri uri, @Nullable String[] projection,
@Nullable String selection, @Nullable String[] selectionArgs,
@Nullable String sortOrder);
/**
* Implement this to handle query requests from clients with support for cancellation.
*
* <p>Apps targeting {@link android.os.Build.VERSION_CODES#O} or higher should override
* {@link #query(Uri, String[], Bundle, CancellationSignal)} instead of this method.
*
* <p>This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
* <p>
* Example client call:<p>
* <pre>// Request a specific record.
* Cursor managedCursor = managedQuery(
ContentUris.withAppendedId(Contacts.People.CONTENT_URI, 2),
projection, // Which columns to return.
null, // WHERE clause.
null, // WHERE clause value substitution
People.NAME + " ASC"); // Sort order.</pre>
* Example implementation:<p>
* <pre>// SQLiteQueryBuilder is a helper class that creates the
// proper SQL syntax for us.
SQLiteQueryBuilder qBuilder = new SQLiteQueryBuilder();
// Set the table we're querying.
qBuilder.setTables(DATABASE_TABLE_NAME);
// If the query ends in a specific record number, we're
// being asked for a specific record, so set the
// WHERE clause in our query.
if((URI_MATCHER.match(uri)) == SPECIFIC_MESSAGE){
qBuilder.appendWhere("_id=" + uri.getPathLeafId());
}
// Make the query.
Cursor c = qBuilder.query(mDb,
projection,
selection,
selectionArgs,
groupBy,
having,
sortOrder);
c.setNotificationUri(getContext().getContentResolver(), uri);
return c;</pre>
* <p>
* If you implement this method then you must also implement the version of
* {@link #query(Uri, String[], String, String[], String)} that does not take a cancellation
* signal to ensure correct operation on older versions of the Android Framework in
* which the cancellation signal overload was not available.
*
* @param uri The URI to query. This will be the full URI sent by the client;
* if the client is requesting a specific record, the URI will end in a record number
* that the implementation should parse and add to a WHERE or HAVING clause, specifying
* that _id value.
* @param projection The list of columns to put into the cursor. If
* {@code null} all columns are included.
* @param selection A selection criteria to apply when filtering rows.
* If {@code null} then all rows are included.
* @param selectionArgs You may include ?s in selection, which will be replaced by
* the values from selectionArgs, in order that they appear in the selection.
* The values will be bound as Strings.
* @param sortOrder How the rows in the cursor should be sorted.
* If {@code null} then the provider is free to define the sort order.
* @param cancellationSignal A signal to cancel the operation in progress, or {@code null} if none.
* If the operation is canceled, then {@link android.os.OperationCanceledException} will be thrown
* when the query is executed.
* @return a Cursor or {@code null}.
*/
public @Nullable Cursor query(@NonNull Uri uri, @Nullable String[] projection,
@Nullable String selection, @Nullable String[] selectionArgs,
@Nullable String sortOrder, @Nullable CancellationSignal cancellationSignal) {
return query(uri, projection, selection, selectionArgs, sortOrder);
}
/**
* Implement this to handle query requests where the arguments are packed into a {@link Bundle}.
* Arguments may include traditional SQL style query arguments. When present these
* should be handled according to the contract established in
* {@link #query(Uri, String[], String, String[], String, CancellationSignal).
*
* <p>Traditional SQL arguments can be found in the bundle using the following keys:
* <li>{@link ContentResolver#QUERY_ARG_SQL_SELECTION}
* <li>{@link ContentResolver#QUERY_ARG_SQL_SELECTION_ARGS}
* <li>{@link ContentResolver#QUERY_ARG_SQL_SORT_ORDER}
*
* <p>This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*
* <p>
* Example client call:<p>
* <pre>// Request 20 records starting at row index 30.
Bundle queryArgs = new Bundle();
queryArgs.putInt(ContentResolver.QUERY_ARG_OFFSET, 30);
queryArgs.putInt(ContentResolver.QUERY_ARG_LIMIT, 20);
Cursor cursor = getContentResolver().query(
contentUri, // Content Uri is specific to individual content providers.
projection, // String[] describing which columns to return.
queryArgs, // Query arguments.
null); // Cancellation signal.</pre>
*
* Example implementation:<p>
* <pre>
int recordsetSize = 0x1000; // Actual value is implementation specific.
queryArgs = queryArgs != null ? queryArgs : Bundle.EMPTY; // ensure queryArgs is non-null
int offset = queryArgs.getInt(ContentResolver.QUERY_ARG_OFFSET, 0);
int limit = queryArgs.getInt(ContentResolver.QUERY_ARG_LIMIT, Integer.MIN_VALUE);
MatrixCursor c = new MatrixCursor(PROJECTION, limit);
// Calculate the number of items to include in the cursor.
int numItems = MathUtils.constrain(recordsetSize - offset, 0, limit);
// Build the paged result set....
for (int i = offset; i < offset + numItems; i++) {
// populate row from your data.
}
Bundle extras = new Bundle();
c.setExtras(extras);
// Any QUERY_ARG_* key may be included if honored.
// In an actual implementation, include only keys that are both present in queryArgs
// and reflected in the Cursor output. For example, if QUERY_ARG_OFFSET were included
// in queryArgs, but was ignored because it contained an invalid value (like –273),
// then QUERY_ARG_OFFSET should be omitted.
extras.putStringArray(ContentResolver.EXTRA_HONORED_ARGS, new String[] {
ContentResolver.QUERY_ARG_OFFSET,
ContentResolver.QUERY_ARG_LIMIT
});
extras.putInt(ContentResolver.EXTRA_TOTAL_COUNT, recordsetSize);
cursor.setNotificationUri(getContext().getContentResolver(), uri);
return cursor;</pre>
* <p>
* @see #query(Uri, String[], String, String[], String, CancellationSignal) for
* implementation details.
*
* @param uri The URI to query. This will be the full URI sent by the client.
* @param projection The list of columns to put into the cursor.
* If {@code null} provide a default set of columns.
* @param queryArgs A Bundle containing all additional information necessary for the query.
* Values in the Bundle may include SQL style arguments.
* @param cancellationSignal A signal to cancel the operation in progress,
* or {@code null}.
* @return a Cursor or {@code null}.
*/
public @Nullable Cursor query(@NonNull Uri uri, @Nullable String[] projection,
@Nullable Bundle queryArgs, @Nullable CancellationSignal cancellationSignal) {
queryArgs = queryArgs != null ? queryArgs : Bundle.EMPTY;
// if client doesn't supply an SQL sort order argument, attempt to build one from
// QUERY_ARG_SORT* arguments.
String sortClause = queryArgs.getString(ContentResolver.QUERY_ARG_SQL_SORT_ORDER);
if (sortClause == null && queryArgs.containsKey(ContentResolver.QUERY_ARG_SORT_COLUMNS)) {
sortClause = ContentResolver.createSqlSortClause(queryArgs);
}
return query(
uri,
projection,
queryArgs.getString(ContentResolver.QUERY_ARG_SQL_SELECTION),
queryArgs.getStringArray(ContentResolver.QUERY_ARG_SQL_SELECTION_ARGS),
sortClause,
cancellationSignal);
}
/**
* Implement this to handle requests for the MIME type of the data at the
* given URI. The returned MIME type should start with
* <code>vnd.android.cursor.item</code> for a single record,
* or <code>vnd.android.cursor.dir/</code> for multiple items.
* This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*
* <p>Note that there are no permissions needed for an application to
* access this information; if your content provider requires read and/or
* write permissions, or is not exported, all applications can still call
* this method regardless of their access permissions. This allows them
* to retrieve the MIME type for a URI when dispatching intents.
*
* @param uri the URI to query.
* @return a MIME type string, or {@code null} if there is no type.
*/
public abstract @Nullable String getType(@NonNull Uri uri);
/**
* Implement this to support canonicalization of URIs that refer to your
* content provider. A canonical URI is one that can be transported across
* devices, backup/restore, and other contexts, and still be able to refer
* to the same data item. Typically this is implemented by adding query
* params to the URI allowing the content provider to verify that an incoming
* canonical URI references the same data as it was originally intended for and,
* if it doesn't, to find that data (if it exists) in the current environment.
*
* <p>For example, if the content provider holds people and a normal URI in it
* is created with a row index into that people database, the cananical representation
* may have an additional query param at the end which specifies the name of the
* person it is intended for. Later calls into the provider with that URI will look
* up the row of that URI's base index and, if it doesn't match or its entry's
* name doesn't match the name in the query param, perform a query on its database
* to find the correct row to operate on.</p>
*
* <p>If you implement support for canonical URIs, <b>all</b> incoming calls with
* URIs (including this one) must perform this verification and recovery of any
* canonical URIs they receive. In addition, you must also implement
* {@link #uncanonicalize} to strip the canonicalization of any of these URIs.</p>
*
* <p>The default implementation of this method returns null, indicating that
* canonical URIs are not supported.</p>
*
* @param url The Uri to canonicalize.
*
* @return Return the canonical representation of <var>url</var>, or null if
* canonicalization of that Uri is not supported.
*/
public @Nullable Uri canonicalize(@NonNull Uri url) {
return null;
}
/**
* Remove canonicalization from canonical URIs previously returned by
* {@link #canonicalize}. For example, if your implementation is to add
* a query param to canonicalize a URI, this method can simply trip any
* query params on the URI. The default implementation always returns the
* same <var>url</var> that was passed in.
*
* @param url The Uri to remove any canonicalization from.
*
* @return Return the non-canonical representation of <var>url</var>, return
* the <var>url</var> as-is if there is nothing to do, or return null if
* the data identified by the canonical representation can not be found in
* the current environment.
*/
public @Nullable Uri uncanonicalize(@NonNull Uri url) {
return url;
}
/**
* Implement this to support refresh of content identified by {@code uri}. By default, this
* method returns false; providers who wish to implement this should return true to signal the
* client that the provider has tried refreshing with its own implementation.
* <p>
* This allows clients to request an explicit refresh of content identified by {@code uri}.
* <p>
* Client code should only invoke this method when there is a strong indication (such as a user
* initiated pull to refresh gesture) that the content is stale.
* <p>
* Remember to send {@link ContentResolver#notifyChange(Uri, android.database.ContentObserver)}
* notifications when content changes.
*
* @param uri The Uri identifying the data to refresh.
* @param args Additional options from the client. The definitions of these are specific to the
* content provider being called.
* @param cancellationSignal A signal to cancel the operation in progress, or {@code null} if
* none. For example, if you called refresh on a particular uri, you should call
* {@link CancellationSignal#throwIfCanceled()} to check whether the client has
* canceled the refresh request.
* @return true if the provider actually tried refreshing.
*/
public boolean refresh(Uri uri, @Nullable Bundle args,
@Nullable CancellationSignal cancellationSignal) {
return false;
}
/**
* @hide
* Implementation when a caller has performed an insert on the content
* provider, but that call has been rejected for the operation given
* to {@link #setAppOps(int, int)}. The default implementation simply
* returns a dummy URI that is the base URI with a 0 path element
* appended.
*/
public Uri rejectInsert(Uri uri, ContentValues values) {
// If not allowed, we need to return some reasonable URI. Maybe the
// content provider should be responsible for this, but for now we
// will just return the base URI with a dummy '0' tagged on to it.
// You shouldn't be able to read if you can't write, anyway, so it
// shouldn't matter much what is returned.
return uri.buildUpon().appendPath("0").build();
}
/**
* Implement this to handle requests to insert a new row.
* As a courtesy, call {@link ContentResolver#notifyChange(android.net.Uri ,android.database.ContentObserver) notifyChange()}
* after inserting.
* This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
* @param uri The content:// URI of the insertion request. This must not be {@code null}.
* @param values A set of column_name/value pairs to add to the database.
* This must not be {@code null}.
* @return The URI for the newly inserted item.
*/
public abstract @Nullable Uri insert(@NonNull Uri uri, @Nullable ContentValues values);
/**
* Override this to handle requests to insert a set of new rows, or the
* default implementation will iterate over the values and call
* {@link #insert} on each of them.
* As a courtesy, call {@link ContentResolver#notifyChange(android.net.Uri ,android.database.ContentObserver) notifyChange()}
* after inserting.
* This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*
* @param uri The content:// URI of the insertion request.
* @param values An array of sets of column_name/value pairs to add to the database.
* This must not be {@code null}.
* @return The number of values that were inserted.
*/
public int bulkInsert(@NonNull Uri uri, @NonNull ContentValues[] values) {
int numValues = values.length;
for (int i = 0; i < numValues; i++) {
insert(uri, values[i]);
}
return numValues;
}
/**
* Implement this to handle requests to delete one or more rows.
* The implementation should apply the selection clause when performing
* deletion, allowing the operation to affect multiple rows in a directory.
* As a courtesy, call {@link ContentResolver#notifyChange(android.net.Uri ,android.database.ContentObserver) notifyChange()}
* after deleting.
* This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*
* <p>The implementation is responsible for parsing out a row ID at the end
* of the URI, if a specific row is being deleted. That is, the client would
* pass in <code>content://contacts/people/22</code> and the implementation is
* responsible for parsing the record number (22) when creating a SQL statement.
*
* @param uri The full URI to query, including a row ID (if a specific record is requested).
* @param selection An optional restriction to apply to rows when deleting.
* @return The number of rows affected.
* @throws SQLException
*/
public abstract int delete(@NonNull Uri uri, @Nullable String selection,
@Nullable String[] selectionArgs);
/**
* Implement this to handle requests to update one or more rows.
* The implementation should update all rows matching the selection
* to set the columns according to the provided values map.
* As a courtesy, call {@link ContentResolver#notifyChange(android.net.Uri ,android.database.ContentObserver) notifyChange()}
* after updating.
* This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*
* @param uri The URI to query. This can potentially have a record ID if this
* is an update request for a specific record.
* @param values A set of column_name/value pairs to update in the database.
* This must not be {@code null}.
* @param selection An optional filter to match rows to update.
* @return the number of rows affected.
*/
public abstract int update(@NonNull Uri uri, @Nullable ContentValues values,
@Nullable String selection, @Nullable String[] selectionArgs);
/**
* Override this to handle requests to open a file blob.
* The default implementation always throws {@link FileNotFoundException}.
* This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*
* <p>This method returns a ParcelFileDescriptor, which is returned directly
* to the caller. This way large data (such as images and documents) can be
* returned without copying the content.
*
* <p>The returned ParcelFileDescriptor is owned by the caller, so it is
* their responsibility to close it when done. That is, the implementation
* of this method should create a new ParcelFileDescriptor for each call.
* <p>
* If opened with the exclusive "r" or "w" modes, the returned
* ParcelFileDescriptor can be a pipe or socket pair to enable streaming
* of data. Opening with the "rw" or "rwt" modes implies a file on disk that
* supports seeking.
* <p>
* If you need to detect when the returned ParcelFileDescriptor has been
* closed, or if the remote process has crashed or encountered some other
* error, you can use {@link ParcelFileDescriptor#open(File, int,
* android.os.Handler, android.os.ParcelFileDescriptor.OnCloseListener)},
* {@link ParcelFileDescriptor#createReliablePipe()}, or
* {@link ParcelFileDescriptor#createReliableSocketPair()}.
* <p>
* If you need to return a large file that isn't backed by a real file on
* disk, such as a file on a network share or cloud storage service,
* consider using
* {@link StorageManager#openProxyFileDescriptor(int, android.os.ProxyFileDescriptorCallback, android.os.Handler)}
* which will let you to stream the content on-demand.
*
* <p class="note">For use in Intents, you will want to implement {@link #getType}
* to return the appropriate MIME type for the data returned here with
* the same URI. This will allow intent resolution to automatically determine the data MIME
* type and select the appropriate matching targets as part of its operation.</p>
*
* <p class="note">For better interoperability with other applications, it is recommended
* that for any URIs that can be opened, you also support queries on them
* containing at least the columns specified by {@link android.provider.OpenableColumns}.
* You may also want to support other common columns if you have additional meta-data
* to supply, such as {@link android.provider.MediaStore.MediaColumns#DATE_ADDED}
* in {@link android.provider.MediaStore.MediaColumns}.</p>
*
* @param uri The URI whose file is to be opened.
* @param mode Access mode for the file. May be "r" for read-only access,
* "rw" for read and write access, or "rwt" for read and write access
* that truncates any existing file.
*
* @return Returns a new ParcelFileDescriptor which you can use to access
* the file.
*
* @throws FileNotFoundException Throws FileNotFoundException if there is
* no file associated with the given URI or the mode is invalid.
* @throws SecurityException Throws SecurityException if the caller does
* not have permission to access the file.
*
* @see #openAssetFile(Uri, String)
* @see #openFileHelper(Uri, String)
* @see #getType(android.net.Uri)
* @see ParcelFileDescriptor#parseMode(String)
*/
public @Nullable ParcelFileDescriptor openFile(@NonNull Uri uri, @NonNull String mode)
throws FileNotFoundException {
throw new FileNotFoundException("No files supported by provider at "
+ uri);
}
/**
* Override this to handle requests to open a file blob.
* The default implementation always throws {@link FileNotFoundException}.
* This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*
* <p>This method returns a ParcelFileDescriptor, which is returned directly
* to the caller. This way large data (such as images and documents) can be
* returned without copying the content.
*
* <p>The returned ParcelFileDescriptor is owned by the caller, so it is
* their responsibility to close it when done. That is, the implementation
* of this method should create a new ParcelFileDescriptor for each call.
* <p>
* If opened with the exclusive "r" or "w" modes, the returned
* ParcelFileDescriptor can be a pipe or socket pair to enable streaming
* of data. Opening with the "rw" or "rwt" modes implies a file on disk that
* supports seeking.
* <p>
* If you need to detect when the returned ParcelFileDescriptor has been
* closed, or if the remote process has crashed or encountered some other
* error, you can use {@link ParcelFileDescriptor#open(File, int,
* android.os.Handler, android.os.ParcelFileDescriptor.OnCloseListener)},
* {@link ParcelFileDescriptor#createReliablePipe()}, or
* {@link ParcelFileDescriptor#createReliableSocketPair()}.
*
* <p class="note">For use in Intents, you will want to implement {@link #getType}
* to return the appropriate MIME type for the data returned here with
* the same URI. This will allow intent resolution to automatically determine the data MIME
* type and select the appropriate matching targets as part of its operation.</p>
*
* <p class="note">For better interoperability with other applications, it is recommended
* that for any URIs that can be opened, you also support queries on them
* containing at least the columns specified by {@link android.provider.OpenableColumns}.
* You may also want to support other common columns if you have additional meta-data
* to supply, such as {@link android.provider.MediaStore.MediaColumns#DATE_ADDED}
* in {@link android.provider.MediaStore.MediaColumns}.</p>
*
* @param uri The URI whose file is to be opened.
* @param mode Access mode for the file. May be "r" for read-only access,
* "w" for write-only access, "rw" for read and write access, or
* "rwt" for read and write access that truncates any existing
* file.
* @param signal A signal to cancel the operation in progress, or
* {@code null} if none. For example, if you are downloading a
* file from the network to service a "rw" mode request, you
* should periodically call
* {@link CancellationSignal#throwIfCanceled()} to check whether
* the client has canceled the request and abort the download.
*
* @return Returns a new ParcelFileDescriptor which you can use to access
* the file.
*
* @throws FileNotFoundException Throws FileNotFoundException if there is
* no file associated with the given URI or the mode is invalid.
* @throws SecurityException Throws SecurityException if the caller does
* not have permission to access the file.
*
* @see #openAssetFile(Uri, String)
* @see #openFileHelper(Uri, String)
* @see #getType(android.net.Uri)
* @see ParcelFileDescriptor#parseMode(String)
*/
public @Nullable ParcelFileDescriptor openFile(@NonNull Uri uri, @NonNull String mode,
@Nullable CancellationSignal signal) throws FileNotFoundException {
return openFile(uri, mode);
}
/**
* This is like {@link #openFile}, but can be implemented by providers
* that need to be able to return sub-sections of files, often assets
* inside of their .apk.
* This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*
* <p>If you implement this, your clients must be able to deal with such
* file slices, either directly with
* {@link ContentResolver#openAssetFileDescriptor}, or by using the higher-level
* {@link ContentResolver#openInputStream ContentResolver.openInputStream}
* or {@link ContentResolver#openOutputStream ContentResolver.openOutputStream}
* methods.
* <p>
* The returned AssetFileDescriptor can be a pipe or socket pair to enable
* streaming of data.
*
* <p class="note">If you are implementing this to return a full file, you
* should create the AssetFileDescriptor with
* {@link AssetFileDescriptor#UNKNOWN_LENGTH} to be compatible with
* applications that cannot handle sub-sections of files.</p>
*
* <p class="note">For use in Intents, you will want to implement {@link #getType}
* to return the appropriate MIME type for the data returned here with
* the same URI. This will allow intent resolution to automatically determine the data MIME
* type and select the appropriate matching targets as part of its operation.</p>
*
* <p class="note">For better interoperability with other applications, it is recommended
* that for any URIs that can be opened, you also support queries on them
* containing at least the columns specified by {@link android.provider.OpenableColumns}.</p>
*
* @param uri The URI whose file is to be opened.
* @param mode Access mode for the file. May be "r" for read-only access,
* "w" for write-only access (erasing whatever data is currently in
* the file), "wa" for write-only access to append to any existing data,
* "rw" for read and write access on any existing data, and "rwt" for read
* and write access that truncates any existing file.
*
* @return Returns a new AssetFileDescriptor which you can use to access
* the file.
*
* @throws FileNotFoundException Throws FileNotFoundException if there is
* no file associated with the given URI or the mode is invalid.
* @throws SecurityException Throws SecurityException if the caller does
* not have permission to access the file.
*
* @see #openFile(Uri, String)
* @see #openFileHelper(Uri, String)
* @see #getType(android.net.Uri)
*/
public @Nullable AssetFileDescriptor openAssetFile(@NonNull Uri uri, @NonNull String mode)
throws FileNotFoundException {
ParcelFileDescriptor fd = openFile(uri, mode);
return fd != null ? new AssetFileDescriptor(fd, 0, -1) : null;
}
/**
* This is like {@link #openFile}, but can be implemented by providers
* that need to be able to return sub-sections of files, often assets
* inside of their .apk.
* This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*
* <p>If you implement this, your clients must be able to deal with such
* file slices, either directly with
* {@link ContentResolver#openAssetFileDescriptor}, or by using the higher-level
* {@link ContentResolver#openInputStream ContentResolver.openInputStream}
* or {@link ContentResolver#openOutputStream ContentResolver.openOutputStream}
* methods.
* <p>
* The returned AssetFileDescriptor can be a pipe or socket pair to enable
* streaming of data.
*
* <p class="note">If you are implementing this to return a full file, you
* should create the AssetFileDescriptor with
* {@link AssetFileDescriptor#UNKNOWN_LENGTH} to be compatible with
* applications that cannot handle sub-sections of files.</p>
*
* <p class="note">For use in Intents, you will want to implement {@link #getType}
* to return the appropriate MIME type for the data returned here with
* the same URI. This will allow intent resolution to automatically determine the data MIME
* type and select the appropriate matching targets as part of its operation.</p>
*
* <p class="note">For better interoperability with other applications, it is recommended
* that for any URIs that can be opened, you also support queries on them
* containing at least the columns specified by {@link android.provider.OpenableColumns}.</p>
*
* @param uri The URI whose file is to be opened.
* @param mode Access mode for the file. May be "r" for read-only access,
* "w" for write-only access (erasing whatever data is currently in
* the file), "wa" for write-only access to append to any existing data,
* "rw" for read and write access on any existing data, and "rwt" for read
* and write access that truncates any existing file.
* @param signal A signal to cancel the operation in progress, or
* {@code null} if none. For example, if you are downloading a
* file from the network to service a "rw" mode request, you
* should periodically call
* {@link CancellationSignal#throwIfCanceled()} to check whether
* the client has canceled the request and abort the download.
*
* @return Returns a new AssetFileDescriptor which you can use to access
* the file.
*
* @throws FileNotFoundException Throws FileNotFoundException if there is
* no file associated with the given URI or the mode is invalid.
* @throws SecurityException Throws SecurityException if the caller does
* not have permission to access the file.
*
* @see #openFile(Uri, String)
* @see #openFileHelper(Uri, String)
* @see #getType(android.net.Uri)
*/
public @Nullable AssetFileDescriptor openAssetFile(@NonNull Uri uri, @NonNull String mode,
@Nullable CancellationSignal signal) throws FileNotFoundException {
return openAssetFile(uri, mode);
}
/**
* Convenience for subclasses that wish to implement {@link #openFile}
* by looking up a column named "_data" at the given URI.
*
* @param uri The URI to be opened.
* @param mode The file mode. May be "r" for read-only access,
* "w" for write-only access (erasing whatever data is currently in
* the file), "wa" for write-only access to append to any existing data,
* "rw" for read and write access on any existing data, and "rwt" for read
* and write access that truncates any existing file.
*
* @return Returns a new ParcelFileDescriptor that can be used by the
* client to access the file.
*/
protected final @NonNull ParcelFileDescriptor openFileHelper(@NonNull Uri uri,
@NonNull String mode) throws FileNotFoundException {
Cursor c = query(uri, new String[]{"_data"}, null, null, null);
int count = (c != null) ? c.getCount() : 0;
if (count != 1) {
// If there is not exactly one result, throw an appropriate
// exception.
if (c != null) {
c.close();
}
if (count == 0) {
throw new FileNotFoundException("No entry for " + uri);
}
throw new FileNotFoundException("Multiple items at " + uri);
}
c.moveToFirst();
int i = c.getColumnIndex("_data");
String path = (i >= 0 ? c.getString(i) : null);
c.close();
if (path == null) {
throw new FileNotFoundException("Column _data not found.");
}
int modeBits = ParcelFileDescriptor.parseMode(mode);
return ParcelFileDescriptor.open(new File(path), modeBits);
}
/**
* Called by a client to determine the types of data streams that this
* content provider supports for the given URI. The default implementation
* returns {@code null}, meaning no types. If your content provider stores data
* of a particular type, return that MIME type if it matches the given
* mimeTypeFilter. If it can perform type conversions, return an array
* of all supported MIME types that match mimeTypeFilter.
*
* @param uri The data in the content provider being queried.
* @param mimeTypeFilter The type of data the client desires. May be
* a pattern, such as */* to retrieve all possible data types.
* @return Returns {@code null} if there are no possible data streams for the
* given mimeTypeFilter. Otherwise returns an array of all available
* concrete MIME types.
*
* @see #getType(Uri)
* @see #openTypedAssetFile(Uri, String, Bundle)
* @see ClipDescription#compareMimeTypes(String, String)
*/
public @Nullable String[] getStreamTypes(@NonNull Uri uri, @NonNull String mimeTypeFilter) {
return null;
}
/**
* Called by a client to open a read-only stream containing data of a
* particular MIME type. This is like {@link #openAssetFile(Uri, String)},
* except the file can only be read-only and the content provider may
* perform data conversions to generate data of the desired type.
*
* <p>The default implementation compares the given mimeType against the
* result of {@link #getType(Uri)} and, if they match, simply calls
* {@link #openAssetFile(Uri, String)}.
*
* <p>See {@link ClipData} for examples of the use and implementation
* of this method.
* <p>
* The returned AssetFileDescriptor can be a pipe or socket pair to enable
* streaming of data.
*
* <p class="note">For better interoperability with other applications, it is recommended
* that for any URIs that can be opened, you also support queries on them
* containing at least the columns specified by {@link android.provider.OpenableColumns}.
* You may also want to support other common columns if you have additional meta-data
* to supply, such as {@link android.provider.MediaStore.MediaColumns#DATE_ADDED}
* in {@link android.provider.MediaStore.MediaColumns}.</p>
*
* @param uri The data in the content provider being queried.
* @param mimeTypeFilter The type of data the client desires. May be
* a pattern, such as */*, if the caller does not have specific type
* requirements; in this case the content provider will pick its best
* type matching the pattern.
* @param opts Additional options from the client. The definitions of
* these are specific to the content provider being called.
*
* @return Returns a new AssetFileDescriptor from which the client can
* read data of the desired type.
*
* @throws FileNotFoundException Throws FileNotFoundException if there is
* no file associated with the given URI or the mode is invalid.
* @throws SecurityException Throws SecurityException if the caller does
* not have permission to access the data.
* @throws IllegalArgumentException Throws IllegalArgumentException if the
* content provider does not support the requested MIME type.
*
* @see #getStreamTypes(Uri, String)
* @see #openAssetFile(Uri, String)
* @see ClipDescription#compareMimeTypes(String, String)
*/
public @Nullable AssetFileDescriptor openTypedAssetFile(@NonNull Uri uri,
@NonNull String mimeTypeFilter, @Nullable Bundle opts) throws FileNotFoundException {
if ("*/*".equals(mimeTypeFilter)) {
// If they can take anything, the untyped open call is good enough.
return openAssetFile(uri, "r");
}
String baseType = getType(uri);
if (baseType != null && ClipDescription.compareMimeTypes(baseType, mimeTypeFilter)) {
// Use old untyped open call if this provider has a type for this
// URI and it matches the request.
return openAssetFile(uri, "r");
}
throw new FileNotFoundException("Can't open " + uri + " as type " + mimeTypeFilter);
}
/**
* Called by a client to open a read-only stream containing data of a
* particular MIME type. This is like {@link #openAssetFile(Uri, String)},
* except the file can only be read-only and the content provider may
* perform data conversions to generate data of the desired type.
*
* <p>The default implementation compares the given mimeType against the
* result of {@link #getType(Uri)} and, if they match, simply calls
* {@link #openAssetFile(Uri, String)}.
*
* <p>See {@link ClipData} for examples of the use and implementation
* of this method.
* <p>
* The returned AssetFileDescriptor can be a pipe or socket pair to enable
* streaming of data.
*
* <p class="note">For better interoperability with other applications, it is recommended
* that for any URIs that can be opened, you also support queries on them
* containing at least the columns specified by {@link android.provider.OpenableColumns}.
* You may also want to support other common columns if you have additional meta-data
* to supply, such as {@link android.provider.MediaStore.MediaColumns#DATE_ADDED}
* in {@link android.provider.MediaStore.MediaColumns}.</p>
*
* @param uri The data in the content provider being queried.
* @param mimeTypeFilter The type of data the client desires. May be
* a pattern, such as */*, if the caller does not have specific type
* requirements; in this case the content provider will pick its best
* type matching the pattern.
* @param opts Additional options from the client. The definitions of
* these are specific to the content provider being called.
* @param signal A signal to cancel the operation in progress, or
* {@code null} if none. For example, if you are downloading a
* file from the network to service a "rw" mode request, you
* should periodically call
* {@link CancellationSignal#throwIfCanceled()} to check whether
* the client has canceled the request and abort the download.
*
* @return Returns a new AssetFileDescriptor from which the client can
* read data of the desired type.
*
* @throws FileNotFoundException Throws FileNotFoundException if there is
* no file associated with the given URI or the mode is invalid.
* @throws SecurityException Throws SecurityException if the caller does
* not have permission to access the data.
* @throws IllegalArgumentException Throws IllegalArgumentException if the
* content provider does not support the requested MIME type.
*
* @see #getStreamTypes(Uri, String)
* @see #openAssetFile(Uri, String)
* @see ClipDescription#compareMimeTypes(String, String)
*/
public @Nullable AssetFileDescriptor openTypedAssetFile(@NonNull Uri uri,
@NonNull String mimeTypeFilter, @Nullable Bundle opts,
@Nullable CancellationSignal signal) throws FileNotFoundException {
return openTypedAssetFile(uri, mimeTypeFilter, opts);
}
/**
* Interface to write a stream of data to a pipe. Use with
* {@link ContentProvider#openPipeHelper}.
*/
public interface PipeDataWriter<T> {
/**
* Called from a background thread to stream data out to a pipe.
* Note that the pipe is blocking, so this thread can block on
* writes for an arbitrary amount of time if the client is slow
* at reading.
*
* @param output The pipe where data should be written. This will be
* closed for you upon returning from this function.
* @param uri The URI whose data is to be written.
* @param mimeType The desired type of data to be written.
* @param opts Options supplied by caller.
* @param args Your own custom arguments.
*/
public void writeDataToPipe(@NonNull ParcelFileDescriptor output, @NonNull Uri uri,
@NonNull String mimeType, @Nullable Bundle opts, @Nullable T args);
}
/**
* A helper function for implementing {@link #openTypedAssetFile}, for
* creating a data pipe and background thread allowing you to stream
* generated data back to the client. This function returns a new
* ParcelFileDescriptor that should be returned to the caller (the caller
* is responsible for closing it).
*
* @param uri The URI whose data is to be written.
* @param mimeType The desired type of data to be written.
* @param opts Options supplied by caller.
* @param args Your own custom arguments.
* @param func Interface implementing the function that will actually
* stream the data.
* @return Returns a new ParcelFileDescriptor holding the read side of
* the pipe. This should be returned to the caller for reading; the caller
* is responsible for closing it when done.
*/
public @NonNull <T> ParcelFileDescriptor openPipeHelper(final @NonNull Uri uri,
final @NonNull String mimeType, final @Nullable Bundle opts, final @Nullable T args,
final @NonNull PipeDataWriter<T> func) throws FileNotFoundException {
try {
final ParcelFileDescriptor[] fds = ParcelFileDescriptor.createPipe();
AsyncTask<Object, Object, Object> task = new AsyncTask<Object, Object, Object>() {
@Override
protected Object doInBackground(Object... params) {
func.writeDataToPipe(fds[1], uri, mimeType, opts, args);
try {
fds[1].close();
} catch (IOException e) {
Log.w(TAG, "Failure closing pipe", e);
}
return null;
}
};
task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Object[])null);
return fds[0];
} catch (IOException e) {
throw new FileNotFoundException("failure making pipe");
}
}
/**
* Returns true if this instance is a temporary content provider.
* @return true if this instance is a temporary content provider
*/
protected boolean isTemporary() {
return false;
}
/**
* Returns the Binder object for this provider.
*
* @return the Binder object for this provider
* @hide
*/
public IContentProvider getIContentProvider() {
return mTransport;
}
/**
* Like {@link #attachInfo(Context, android.content.pm.ProviderInfo)}, but for use
* when directly instantiating the provider for testing.
* @hide
*/
public void attachInfoForTesting(Context context, ProviderInfo info) {
attachInfo(context, info, true);
}
/**
* After being instantiated, this is called to tell the content provider
* about itself.
*
* @param context The context this provider is running in
* @param info Registered information about this content provider
*/
public void attachInfo(Context context, ProviderInfo info) {
attachInfo(context, info, false);
}
private void attachInfo(Context context, ProviderInfo info, boolean testing) {
mNoPerms = testing;
/*
* Only allow it to be set once, so after the content service gives
* this to us clients can't change it.
*/
if (mContext == null) {
mContext = context;
if (context != null) {
mTransport.mAppOpsManager = (AppOpsManager) context.getSystemService(
Context.APP_OPS_SERVICE);
}
mMyUid = Process.myUid();
if (info != null) {
setReadPermission(info.readPermission);
setWritePermission(info.writePermission);
setPathPermissions(info.pathPermissions);
mExported = info.exported;
mSingleUser = (info.flags & ProviderInfo.FLAG_SINGLE_USER) != 0;
setAuthorities(info.authority);
}
ContentProvider.this.onCreate();
}
}
/**
* Override this to handle requests to perform a batch of operations, or the
* default implementation will iterate over the operations and call
* {@link ContentProviderOperation#apply} on each of them.
* If all calls to {@link ContentProviderOperation#apply} succeed
* then a {@link ContentProviderResult} array with as many
* elements as there were operations will be returned. If any of the calls
* fail, it is up to the implementation how many of the others take effect.
* This method can be called from multiple threads, as described in
* <a href="{@docRoot}guide/topics/fundamentals/processes-and-threads.html#Threads">Processes
* and Threads</a>.
*
* @param operations the operations to apply
* @return the results of the applications
* @throws OperationApplicationException thrown if any operation fails.
* @see ContentProviderOperation#apply
*/
public @NonNull ContentProviderResult[] applyBatch(
@NonNull ArrayList<ContentProviderOperation> operations)
throws OperationApplicationException {
final int numOperations = operations.size();
final ContentProviderResult[] results = new ContentProviderResult[numOperations];
for (int i = 0; i < numOperations; i++) {
results[i] = operations.get(i).apply(this, results, i);
}
return results;
}
/**
* Call a provider-defined method. This can be used to implement
* interfaces that are cheaper and/or unnatural for a table-like
* model.
*
* <p class="note"><strong>WARNING:</strong> The framework does no permission checking
* on this entry into the content provider besides the basic ability for the application
* to get access to the provider at all. For example, it has no idea whether the call
* being executed may read or write data in the provider, so can't enforce those
* individual permissions. Any implementation of this method <strong>must</strong>
* do its own permission checks on incoming calls to make sure they are allowed.</p>
*
* @param method method name to call. Opaque to framework, but should not be {@code null}.
* @param arg provider-defined String argument. May be {@code null}.
* @param extras provider-defined Bundle argument. May be {@code null}.
* @return provider-defined return value. May be {@code null}, which is also
* the default for providers which don't implement any call methods.
*/
public @Nullable Bundle call(@NonNull String method, @Nullable String arg,
@Nullable Bundle extras) {
return null;
}
/**
* Implement this to shut down the ContentProvider instance. You can then
* invoke this method in unit tests.
*
* <p>
* Android normally handles ContentProvider startup and shutdown
* automatically. You do not need to start up or shut down a
* ContentProvider. When you invoke a test method on a ContentProvider,
* however, a ContentProvider instance is started and keeps running after
* the test finishes, even if a succeeding test instantiates another
* ContentProvider. A conflict develops because the two instances are
* usually running against the same underlying data source (for example, an
* sqlite database).
* </p>
* <p>
* Implementing shutDown() avoids this conflict by providing a way to
* terminate the ContentProvider. This method can also prevent memory leaks
* from multiple instantiations of the ContentProvider, and it can ensure
* unit test isolation by allowing you to completely clean up the test
* fixture before moving on to the next test.
* </p>
*/
public void shutdown() {
Log.w(TAG, "implement ContentProvider shutdown() to make sure all database " +
"connections are gracefully shutdown");
}
/**
* Print the Provider's state into the given stream. This gets invoked if
* you run "adb shell dumpsys activity provider <provider_component_name>".
*
* @param fd The raw file descriptor that the dump is being sent to.
* @param writer The PrintWriter to which you should dump your state. This will be
* closed for you after you return.
* @param args additional arguments to the dump request.
*/
public void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
writer.println("nothing to dump");
}
/** @hide */
private void validateIncomingUri(Uri uri) throws SecurityException {
String auth = uri.getAuthority();
if (!mSingleUser) {
int userId = getUserIdFromAuthority(auth, UserHandle.USER_CURRENT);
if (userId != UserHandle.USER_CURRENT && userId != mContext.getUserId()) {
throw new SecurityException("trying to query a ContentProvider in user "
+ mContext.getUserId() + " with a uri belonging to user " + userId);
}
}
if (!matchesOurAuthorities(getAuthorityWithoutUserId(auth))) {
String message = "The authority of the uri " + uri + " does not match the one of the "
+ "contentProvider: ";
if (mAuthority != null) {
message += mAuthority;
} else {
message += Arrays.toString(mAuthorities);
}
throw new SecurityException(message);
}
}
/** @hide */
private Uri maybeGetUriWithoutUserId(Uri uri) {
if (mSingleUser) {
return uri;
}
return getUriWithoutUserId(uri);
}
/** @hide */
public static int getUserIdFromAuthority(String auth, int defaultUserId) {
if (auth == null) return defaultUserId;
int end = auth.lastIndexOf('@');
if (end == -1) return defaultUserId;
String userIdString = auth.substring(0, end);
try {
return Integer.parseInt(userIdString);
} catch (NumberFormatException e) {
Log.w(TAG, "Error parsing userId.", e);
return UserHandle.USER_NULL;
}
}
/** @hide */
public static int getUserIdFromAuthority(String auth) {
return getUserIdFromAuthority(auth, UserHandle.USER_CURRENT);
}
/** @hide */
public static int getUserIdFromUri(Uri uri, int defaultUserId) {
if (uri == null) return defaultUserId;
return getUserIdFromAuthority(uri.getAuthority(), defaultUserId);
}
/** @hide */
public static int getUserIdFromUri(Uri uri) {
return getUserIdFromUri(uri, UserHandle.USER_CURRENT);
}
/**
* Removes userId part from authority string. Expects format:
* [email protected]
* If there is no userId in the authority, it symply returns the argument
* @hide
*/
public static String getAuthorityWithoutUserId(String auth) {
if (auth == null) return null;
int end = auth.lastIndexOf('@');
return auth.substring(end+1);
}
/** @hide */
public static Uri getUriWithoutUserId(Uri uri) {
if (uri == null) return null;
Uri.Builder builder = uri.buildUpon();
builder.authority(getAuthorityWithoutUserId(uri.getAuthority()));
return builder.build();
}
/** @hide */
public static boolean uriHasUserId(Uri uri) {
if (uri == null) return false;
return !TextUtils.isEmpty(uri.getUserInfo());
}
/** @hide */
public static Uri maybeAddUserId(Uri uri, int userId) {
if (uri == null) return null;
if (userId != UserHandle.USER_CURRENT
&& ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())) {
if (!uriHasUserId(uri)) {
//We don't add the user Id if there's already one
Uri.Builder builder = uri.buildUpon();
builder.encodedAuthority("" + userId + "@" + uri.getEncodedAuthority());
return builder.build();
}
}
return uri;
}
}
