/*
* Copyright (C) 2014 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 com.example.android.apprestrictionenforcer;
import android.app.Activity;
import android.app.admin.DevicePolicyManager;
import android.content.Context;
import android.content.RestrictionEntry;
import android.content.RestrictionsManager;
import android.content.SharedPreferences;
import android.os.Build;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Spinner;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* This fragment provides UI and functionality to set restrictions on the AppRestrictionSchema
* sample.
*/
public class AppRestrictionEnforcerFragment extends Fragment implements
CompoundButton.OnCheckedChangeListener, AdapterView.OnItemSelectedListener,
View.OnClickListener, ItemAddFragment.OnItemAddedListener {
/**
* Key for {@link SharedPreferences}
*/
private static final String PREFS_KEY = "AppRestrictionEnforcerFragment";
/**
* Key for the boolean restriction in AppRestrictionSchema.
*/
private static final String RESTRICTION_KEY_SAY_HELLO = "can_say_hello";
/**
* Key for the string restriction in AppRestrictionSchema.
*/
private static final String RESTRICTION_KEY_MESSAGE = "message";
/**
* Key for the integer restriction in AppRestrictionSchema.
*/
private static final String RESTRICTION_KEY_NUMBER = "number";
/**
* Key for the choice restriction in AppRestrictionSchema.
*/
private static final String RESTRICTION_KEY_RANK = "rank";
/**
* Key for the multi-select restriction in AppRestrictionSchema.
*/
private static final String RESTRICTION_KEY_APPROVALS = "approvals";
/**
* Key for the bundle array restriction in AppRestrictionSchema.
*/
private static final String RESTRICTION_KEY_ITEMS = "items";
private static final String RESTRICTION_KEY_ITEM_KEY = "key";
private static final String RESTRICTION_KEY_ITEM_VALUE = "value";
private static final String DELIMETER = ",";
private static final String SEPARATOR = ":";
private static final boolean BUNDLE_SUPPORTED = Build.VERSION.SDK_INT >= 23;
/**
* Current status of the restrictions.
*/
private Bundle mCurrentRestrictions = new Bundle();
// UI Components
private Switch mSwitchSayHello;
private EditText mEditMessage;
private EditText mEditNumber;
private Spinner mSpinnerRank;
private LinearLayout mLayoutApprovals;
private LinearLayout mLayoutItems;
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
@Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_app_restriction_enforcer, container, false);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
// Retain references for the UI elements
mSwitchSayHello = (Switch) view.findViewById(R.id.say_hello);
mEditMessage = (EditText) view.findViewById(R.id.message);
mEditNumber = (EditText) view.findViewById(R.id.number);
mSpinnerRank = (Spinner) view.findViewById(R.id.rank);
mLayoutApprovals = (LinearLayout) view.findViewById(R.id.approvals);
mLayoutItems = (LinearLayout) view.findViewById(R.id.items);
view.findViewById(R.id.item_add).setOnClickListener(this);
View bundleArrayLayout = view.findViewById(R.id.bundle_array_layout);
if (BUNDLE_SUPPORTED) {
bundleArrayLayout.setVisibility(View.VISIBLE);
} else {
bundleArrayLayout.setVisibility(View.GONE);
}
}
@Override
public void onResume() {
super.onResume();
loadRestrictions(getActivity());
}
@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
switch (compoundButton.getId()) {
case R.id.say_hello: {
saveCanSayHello(getActivity(), checked);
break;
}
case R.id.approval: {
if (checked) {
addApproval(getActivity(), (String) compoundButton.getTag());
} else {
removeApproval(getActivity(), (String) compoundButton.getTag());
}
break;
}
}
}
private TextWatcher mWatcherMessage = new EasyTextWatcher() {
@Override
public void afterTextChanged(Editable s) {
saveMessage(getActivity(), s.toString());
}
};
private TextWatcher mWatcherNumber = new EasyTextWatcher() {
@Override
public void afterTextChanged(Editable s) {
try {
String string = s.toString();
if (!TextUtils.isEmpty(string)) {
saveNumber(getActivity(), Integer.parseInt(string));
}
} catch (NumberFormatException e) {
Toast.makeText(getActivity(), "Not an integer!", Toast.LENGTH_SHORT).show();
}
}
};
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
switch (parent.getId()) {
case R.id.rank: {
saveRank(getActivity(), (String) parent.getAdapter().getItem(position));
break;
}
}
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
// Nothing to do
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.item_add:
new ItemAddFragment().show(getChildFragmentManager(), "dialog");
break;
case R.id.item_remove:
String key = (String) v.getTag();
removeItem(key);
mLayoutItems.removeView((View) v.getParent());
break;
}
}
@Override
public void onItemAdded(String key, String value) {
key = TextUtils.replace(key,
new String[]{DELIMETER, SEPARATOR}, new String[]{"", ""}).toString();
value = TextUtils.replace(value,
new String[]{DELIMETER, SEPARATOR}, new String[]{"", ""}).toString();
Parcelable[] parcelables = mCurrentRestrictions.getParcelableArray(RESTRICTION_KEY_ITEMS);
Map<String, String> items = new HashMap<>();
if (parcelables != null) {
for (Parcelable parcelable : parcelables) {
Bundle bundle = (Bundle) parcelable;
items.put(bundle.getString(RESTRICTION_KEY_ITEM_KEY),
bundle.getString(RESTRICTION_KEY_ITEM_VALUE));
}
}
items.put(key, value);
insertItemRow(LayoutInflater.from(getActivity()), key, value);
saveItems(getActivity(), items);
}
/**
* Loads the restrictions for the AppRestrictionSchema sample.
*
* @param activity The activity
*/
private void loadRestrictions(Activity activity) {
RestrictionsManager manager =
(RestrictionsManager) activity.getSystemService(Context.RESTRICTIONS_SERVICE);
List<RestrictionEntry> restrictions =
manager.getManifestRestrictions(Constants.PACKAGE_NAME_APP_RESTRICTION_SCHEMA);
SharedPreferences prefs = activity.getSharedPreferences(PREFS_KEY, Context.MODE_PRIVATE);
for (RestrictionEntry restriction : restrictions) {
String key = restriction.getKey();
if (RESTRICTION_KEY_SAY_HELLO.equals(key)) {
updateCanSayHello(prefs.getBoolean(RESTRICTION_KEY_SAY_HELLO,
restriction.getSelectedState()));
} else if (RESTRICTION_KEY_MESSAGE.equals(key)) {
updateMessage(prefs.getString(RESTRICTION_KEY_MESSAGE,
restriction.getSelectedString()));
} else if (RESTRICTION_KEY_NUMBER.equals(key)) {
updateNumber(prefs.getInt(RESTRICTION_KEY_NUMBER,
restriction.getIntValue()));
} else if (RESTRICTION_KEY_RANK.equals(key)) {
updateRank(activity, restriction.getChoiceValues(),
prefs.getString(RESTRICTION_KEY_RANK, restriction.getSelectedString()));
} else if (RESTRICTION_KEY_APPROVALS.equals(key)) {
updateApprovals(activity, restriction.getChoiceValues(),
TextUtils.split(prefs.getString(RESTRICTION_KEY_APPROVALS,
TextUtils.join(DELIMETER,
restriction.getAllSelectedStrings())),
DELIMETER));
} else if (BUNDLE_SUPPORTED && RESTRICTION_KEY_ITEMS.equals(key)) {
String itemsString = prefs.getString(RESTRICTION_KEY_ITEMS, "");
HashMap<String, String> items = new HashMap<>();
for (String itemString : TextUtils.split(itemsString, DELIMETER)) {
String[] strings = itemString.split(SEPARATOR, 2);
items.put(strings[0], strings[1]);
}
updateItems(activity, items);
}
}
}
private void updateCanSayHello(boolean canSayHello) {
mCurrentRestrictions.putBoolean(RESTRICTION_KEY_SAY_HELLO, canSayHello);
mSwitchSayHello.setOnCheckedChangeListener(null);
mSwitchSayHello.setChecked(canSayHello);
mSwitchSayHello.setOnCheckedChangeListener(this);
}
private void updateMessage(String message) {
mCurrentRestrictions.putString(RESTRICTION_KEY_MESSAGE, message);
mEditMessage.removeTextChangedListener(mWatcherMessage);
mEditMessage.setText(message);
mEditMessage.addTextChangedListener(mWatcherMessage);
}
private void updateNumber(int number) {
mCurrentRestrictions.putInt(RESTRICTION_KEY_NUMBER, number);
mEditNumber.removeTextChangedListener(mWatcherNumber);
mEditNumber.setText(String.valueOf(number));
mEditNumber.addTextChangedListener(mWatcherNumber);
}
private void updateRank(Context context, String[] ranks, String selectedRank) {
mCurrentRestrictions.putString(RESTRICTION_KEY_RANK, selectedRank);
mSpinnerRank.setAdapter(new ArrayAdapter<>(context,
android.R.layout.simple_spinner_dropdown_item, ranks));
mSpinnerRank.setSelection(search(ranks, selectedRank));
mSpinnerRank.setOnItemSelectedListener(this);
}
private void updateApprovals(Context context, String[] approvals,
String[] selectedApprovals) {
mCurrentRestrictions.putStringArray(RESTRICTION_KEY_APPROVALS, selectedApprovals);
mLayoutApprovals.removeAllViews();
for (String approval : approvals) {
Switch sw = new Switch(context);
sw.setText(approval);
sw.setTag(approval);
sw.setChecked(Arrays.asList(selectedApprovals).contains(approval));
sw.setOnCheckedChangeListener(this);
sw.setId(R.id.approval);
mLayoutApprovals.addView(sw);
}
}
private void updateItems(Context context, Map<String, String> items) {
if (!BUNDLE_SUPPORTED) {
return;
}
mCurrentRestrictions.putParcelableArray(RESTRICTION_KEY_ITEMS, convertToBundles(items));
LayoutInflater inflater = LayoutInflater.from(context);
mLayoutItems.removeAllViews();
for (String key : items.keySet()) {
insertItemRow(inflater, key, items.get(key));
}
}
private void insertItemRow(LayoutInflater inflater, String key, String value) {
View view = inflater.inflate(R.layout.item, mLayoutItems, false);
TextView textView = (TextView) view.findViewById(R.id.item_text);
textView.setText(getString(R.string.item, key, value));
Button remove = (Button) view.findViewById(R.id.item_remove);
remove.setTag(key);
remove.setOnClickListener(this);
mLayoutItems.addView(view);
}
@NonNull
private Bundle[] convertToBundles(Map<String, String> items) {
Bundle[] bundles = new Bundle[items.size()];
int i = 0;
for (String key : items.keySet()) {
Bundle bundle = new Bundle();
bundle.putString(RESTRICTION_KEY_ITEM_KEY, key);
bundle.putString(RESTRICTION_KEY_ITEM_VALUE, items.get(key));
bundles[i++] = bundle;
}
return bundles;
}
private void removeItem(String key) {
Parcelable[] parcelables = mCurrentRestrictions.getParcelableArray(RESTRICTION_KEY_ITEMS);
if (parcelables != null) {
Map<String, String> items = new HashMap<>();
for (Parcelable parcelable : parcelables) {
Bundle bundle = (Bundle) parcelable;
if (!key.equals(bundle.getString(RESTRICTION_KEY_ITEM_KEY))) {
items.put(bundle.getString(RESTRICTION_KEY_ITEM_KEY),
bundle.getString(RESTRICTION_KEY_ITEM_VALUE));
}
}
saveItems(getActivity(), items);
}
}
/**
* Saves the value for the "cay_say_hello" restriction of AppRestrictionSchema.
*
* @param activity The activity
* @param allow The value to be set for the restriction.
*/
private void saveCanSayHello(Activity activity, boolean allow) {
mCurrentRestrictions.putBoolean(RESTRICTION_KEY_SAY_HELLO, allow);
saveRestrictions(activity);
// Note that the owner app needs to remember the restrictions on its own.
editPreferences(activity).putBoolean(RESTRICTION_KEY_SAY_HELLO, allow).apply();
}
/**
* Saves the value for the "message" restriction of AppRestrictionSchema.
*
* @param activity The activity
* @param message The value to be set for the restriction.
*/
private void saveMessage(Activity activity, String message) {
mCurrentRestrictions.putString(RESTRICTION_KEY_MESSAGE, message);
saveRestrictions(activity);
editPreferences(activity).putString(RESTRICTION_KEY_MESSAGE, message).apply();
}
/**
* Saves the value for the "number" restriction of AppRestrictionSchema.
*
* @param activity The activity
* @param number The value to be set for the restriction.
*/
private void saveNumber(Activity activity, int number) {
mCurrentRestrictions.putInt(RESTRICTION_KEY_NUMBER, number);
saveRestrictions(activity);
editPreferences(activity).putInt(RESTRICTION_KEY_NUMBER, number).apply();
}
/**
* Saves the value for the "rank" restriction of AppRestrictionSchema.
*
* @param activity The activity
* @param rank The value to be set for the restriction.
*/
private void saveRank(Activity activity, String rank) {
mCurrentRestrictions.putString(RESTRICTION_KEY_RANK, rank);
saveRestrictions(activity);
editPreferences(activity).putString(RESTRICTION_KEY_RANK, rank).apply();
}
private void addApproval(Activity activity, String approval) {
List<String> approvals = new ArrayList<>(Arrays.asList(
mCurrentRestrictions.getStringArray(RESTRICTION_KEY_APPROVALS)));
if (approvals.contains(approval)) {
return;
}
approvals.add(approval);
saveApprovals(activity, approvals.toArray(new String[approvals.size()]));
}
private void removeApproval(Activity activity, String approval) {
List<String> approvals = new ArrayList<>(Arrays.asList(
mCurrentRestrictions.getStringArray(RESTRICTION_KEY_APPROVALS)));
if (!approval.contains(approval)) {
return;
}
approvals.remove(approval);
saveApprovals(activity, approvals.toArray(new String[approvals.size()]));
}
/**
* Saves the value for the "approvals" restriction of AppRestrictionSchema.
*
* @param activity The activity
* @param approvals The value to be set for the restriction.
*/
private void saveApprovals(Activity activity, String[] approvals) {
mCurrentRestrictions.putStringArray(RESTRICTION_KEY_APPROVALS, approvals);
saveRestrictions(activity);
editPreferences(activity).putString(RESTRICTION_KEY_APPROVALS,
TextUtils.join(DELIMETER, approvals)).apply();
}
/**
* Saves the value for the "items" restriction of AppRestrictionSchema.
*
* @param activity The activity.
* @param items The values.
*/
private void saveItems(Activity activity, Map<String, String> items) {
if (!BUNDLE_SUPPORTED) {
return;
}
mCurrentRestrictions.putParcelableArray(RESTRICTION_KEY_ITEMS, convertToBundles(items));
saveRestrictions(activity);
StringBuilder builder = new StringBuilder();
boolean first = true;
for (String key : items.keySet()) {
if (first) {
first = false;
} else {
builder.append(DELIMETER);
}
builder.append(key);
builder.append(SEPARATOR);
builder.append(items.get(key));
}
editPreferences(activity).putString(RESTRICTION_KEY_ITEMS, builder.toString()).apply();
}
/**
* Saves all the restrictions.
*
* @param activity The activity.
*/
private void saveRestrictions(Activity activity) {
DevicePolicyManager devicePolicyManager
= (DevicePolicyManager) activity.getSystemService(Context.DEVICE_POLICY_SERVICE);
devicePolicyManager.setApplicationRestrictions(
EnforcerDeviceAdminReceiver.getComponentName(activity),
Constants.PACKAGE_NAME_APP_RESTRICTION_SCHEMA, mCurrentRestrictions);
}
private SharedPreferences.Editor editPreferences(Activity activity) {
return activity.getSharedPreferences(PREFS_KEY, Context.MODE_PRIVATE).edit();
}
/**
* Sequential search
*
* @param array The string array
* @param s The string to search for
* @return Index if found. -1 if not found.
*/
private int search(String[] array, String s) {
for (int i = 0; i < array.length; ++i) {
if (s.equals(array[i])) {
return i;
}
}
return -1;
}
}
