package com.adafruit.bluefruit.le.connect.app;
import android.content.Context;
import android.os.ParcelUuid;
import android.os.Parcelable;
import android.text.Html;
import android.text.Spanned;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.DiffUtil;
import androidx.recyclerview.widget.RecyclerView;
import com.adafruit.bluefruit.le.connect.R;
import com.adafruit.bluefruit.le.connect.ble.BleUtils;
import com.adafruit.bluefruit.le.connect.ble.central.BlePeripheral;
import com.adafruit.bluefruit.le.connect.ble.central.BleScanner;
import com.adafruit.bluefruit.le.connect.style.RssiUI;
import com.adafruit.bluefruit.le.connect.utils.AdapterUtils;
import com.adafruit.bluefruit.le.connect.utils.KeyboardUtils;
import com.adafruit.bluefruit.le.connect.utils.LocalizationManager;
import com.adafruit.bluefruit.le.connect.utils.UriBeaconUtils;
import java.lang.ref.WeakReference;
import java.util.Arrays;
import java.util.List;
import no.nordicsemi.android.support.v18.scanner.ScanRecord;
import static com.adafruit.bluefruit.le.connect.ble.central.BleScanner.kDeviceType_Beacon;
import static com.adafruit.bluefruit.le.connect.ble.central.BleScanner.kDeviceType_Uart;
import static com.adafruit.bluefruit.le.connect.ble.central.BleScanner.kDeviceType_UriBeacon;
class BlePeripheralsAdapter extends RecyclerView.Adapter<BlePeripheralsAdapter.ViewHolder> {
// Constants
@SuppressWarnings("unused")
private final static String TAG = BlePeripheralsAdapter.class.getSimpleName();
interface Listener {
void onAdvertisementData(@NonNull BlePeripheral blePeripheral);
}
// Data
private List<BlePeripheral> mBlePeripherals;
private Context mContext;
private RecyclerView mRecyclerView;
private Listener mListener;
BlePeripheralsAdapter(@NonNull Context context, @NonNull Listener listener) {
mContext = context.getApplicationContext();
mListener = listener;
}
private static String deviceDescription(Context context, BlePeripheral blePeripheral) {
final int deviceType = BleScanner.getDeviceType(blePeripheral);
String description;
switch (deviceType) {
case kDeviceType_Uart:
description = context.getString(R.string.scanner_uartavailable);
break;
case kDeviceType_Beacon:
description = context.getString(R.string.scanner_beacon);
break;
case kDeviceType_UriBeacon:
description = context.getString(R.string.scanner_uribeacon);
break;
default:
description = null;
break;
}
return description;
}
private static Spanned getAdvertisementDescription(Context context, BlePeripheral blePeripheral) {
final int deviceType = BleScanner.getDeviceType(blePeripheral);
String text;
switch (deviceType) {
case kDeviceType_Beacon:
text = getBeaconAdvertisementDescription(context, blePeripheral);
break;
case kDeviceType_UriBeacon:
text = getUriBeaconAdvertisementDescription(context, blePeripheral);
break;
default:
text = getCommonAdvertisementDescription(context, blePeripheral);
break;
}
Spanned result;
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
result = Html.fromHtml(text, Html.FROM_HTML_MODE_LEGACY);
} else {
result = Html.fromHtml(text);
}
return result;
}
private static String getUriBeaconAdvertisementDescription(Context context, BlePeripheral blePeripheral) {
StringBuilder result = new StringBuilder();
final String name = blePeripheral.getDevice().getName();
if (name != null) {
result.append(context.getString(R.string.scanresult_advertisement_localname)).append(": <b>").append(name).append("</b><br>");
}
final String address = blePeripheral.getDevice().getAddress();
result.append(context.getString(R.string.scanresult_advertisement_address)).append(": <b>").append(address == null ? "" : address).append("</b><br>");
final ScanRecord scanRecord = blePeripheral.getScanRecord();
if (scanRecord != null) {
byte[] scanRecordBytes = scanRecord.getBytes();
if (scanRecordBytes != null) {
String uri = UriBeaconUtils.getUriFromAdvertisingPacket(scanRecordBytes) + "</b><br>";
result.append(context.getString(R.string.scanresult_advertisement_uribeacon_uri)).append(": <b>").append(uri);
final int txPower = scanRecord.getTxPowerLevel();
if (txPower > -255) { // is valid?
result.append(context.getString(R.string.scanresult_advertisement_txpower)).append(": <b>").append(txPower).append("</b>");
}
}
}
return result.toString();
}
private static String getCommonAdvertisementDescription(Context context, BlePeripheral blePeripheral) {
StringBuilder result = new StringBuilder();
final String name = blePeripheral.getDevice().getName();
if (name != null) {
result.append(context.getString(R.string.scanresult_advertisement_localname)).append(": <b>").append(name).append("</b><br>");
}
final String address = blePeripheral.getDevice().getAddress();
result.append(context.getString(R.string.scanresult_advertisement_address)).append(": <b>").append(address == null ? "" : address).append("</b><br>");
StringBuilder serviceText = new StringBuilder();
ParcelUuid[] uuids = blePeripheral.getDevice().getUuids();
if (uuids != null) {
int i = 0;
for (ParcelUuid uuid : uuids) {
if (i > 0) serviceText.append(", ");
serviceText.append(uuid.toString().toUpperCase());
i++;
}
}
if (!serviceText.toString().isEmpty()) {
result.append(context.getString(R.string.scanresult_advertisement_servicesuuids)).append(": <b>").append(serviceText).append("</b><br>");
}
ScanRecord scanRecord = blePeripheral.getScanRecord();
if (scanRecord != null) {
final int txPower = scanRecord.getTxPowerLevel();
if (txPower > -255) { // is valid?
result.append(context.getString(R.string.scanresult_advertisement_txpower)).append(": <b>").append(txPower).append("</b>");
}
}
return result.toString();
}
// region UI Utils
private static String getBeaconAdvertisementDescription(Context context, BlePeripheral blePeripheral) {
StringBuilder result = new StringBuilder();
final String name = blePeripheral.getDevice().getName();
if (name != null) {
result.append(context.getString(R.string.scanresult_advertisement_localname)).append(": <b>").append(name).append("</b><br>");
}
final String address = blePeripheral.getDevice().getAddress();
result.append(context.getString(R.string.scanresult_advertisement_address)).append(": <b>").append(address == null ? "" : address).append("</b><br>");
ScanRecord scanRecord = blePeripheral.getScanRecord();
if (scanRecord != null) {
byte[] advertisedBytes = scanRecord.getBytes();
if (advertisedBytes != null && advertisedBytes.length > 6) {
final byte[] manufacturerBytes = {advertisedBytes[6], advertisedBytes[5]}; // Little endian
String manufacturerId = BleUtils.bytesToHex(manufacturerBytes);
String manufacturer = getManufacturerName(manufacturerId);
result.append(context.getString(R.string.scanresult_advertisement_manufacturer)).append(": <b>").append(manufacturer == null ? "" : manufacturer).append("</b><br>");
}
}
StringBuilder text = new StringBuilder();
ParcelUuid[] uuids = blePeripheral.getDevice().getUuids();
if (uuids != null && uuids.length == 1) {
ParcelUuid uuid = uuids[0];
text.append(uuid.toString().toUpperCase());
}
result.append(context.getString(R.string.scanresult_advertisement_beacon_major)).append(": <b>").append(text).append("</b><br>");
if (scanRecord != null) {
byte[] advertisedBytes = scanRecord.getBytes();
if (advertisedBytes != null && advertisedBytes.length > 26) {
final byte[] majorBytes = {advertisedBytes[25], advertisedBytes[26]}; // Big endian
final String major = BleUtils.bytesToHex(majorBytes);
result.append(context.getString(R.string.scanresult_advertisement_beacon_major)).append(": <b>").append(major).append("</b><br>");
}
if (advertisedBytes != null && advertisedBytes.length > 28) {
final byte[] minorBytes = {advertisedBytes[27], advertisedBytes[28]}; // Big endian
final String minor = BleUtils.bytesToHex(minorBytes);
result.append(context.getString(R.string.scanresult_advertisement_beacon_minor)).append(": <b>").append(minor).append("</b><br>");
}
final int txPower = scanRecord.getTxPowerLevel();
if (txPower > -255) { // is valid?
result.append(context.getString(R.string.scanresult_advertisement_txpower)).append(": <b>").append(txPower).append("</b>");
}
}
return result.toString();
}
private static String getManufacturerName(String manufacturerId) {
final String[] kKnownManufacturers = {"004C", "0059", "0822"};
final String[] kManufacturerNames = {"Apple (004C)", "Nordic (0059)", "Adafruit (0822)"};
String result;
int knownIndex = Arrays.asList(kKnownManufacturers).indexOf(manufacturerId);
if (knownIndex >= 0) {
result = kManufacturerNames[knownIndex] + " (" + kKnownManufacturers[knownIndex] + ")";
} else {
result = manufacturerId;
}
return result;
}
@Override
public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
mRecyclerView = recyclerView;
}
void setBlePeripherals(final List<BlePeripheral> blePeripherals) {
if (mBlePeripherals == null) {
mBlePeripherals = blePeripherals;
notifyItemRangeInserted(0, mBlePeripherals != null ? mBlePeripherals.size() : 0);
} else {
DiffUtil.DiffResult result = DiffUtil.calculateDiff(new DiffUtil.Callback() {
@Override
public int getOldListSize() {
return mBlePeripherals.size();
}
@Override
public int getNewListSize() {
return blePeripherals.size();
}
@Override
public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
final String oldItemAddress = mBlePeripherals.get(oldItemPosition).getDevice().getAddress();
final String newItemAddress = blePeripherals.get(newItemPosition).getDevice().getAddress();
return oldItemAddress.equals(newItemAddress);
}
@Override
public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
return mBlePeripherals.get(oldItemPosition).equals(blePeripherals.get(newItemPosition));
/*
ScanResult oldScanResult = mBlePeripherals.get(oldItemPosition);
ScanResult newScanResult = scanResults.get(newItemPosition);
return getDrawableIdForRssi(oldScanResult.getRssi()) == getDrawableIdForRssi(newScanResult.getRssi());
*/
}
});
mBlePeripherals = blePeripherals;
// Save and restore state to preserve user scroll
// https://stackoverflow.com/questions/43458146/diffutil-in-recycleview-making-it-autoscroll-if-a-new-item-is-added
RecyclerView.LayoutManager layoutManager = mRecyclerView.getLayoutManager();
if (layoutManager != null) {
Parcelable recyclerViewState = layoutManager.onSaveInstanceState();
result.dispatchUpdatesTo(this);
layoutManager.onRestoreInstanceState(recyclerViewState);
}
// result.dispatchUpdatesTo((ListUpdateCallback)this);
}
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_scan_item, parent, false);
return new ViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull final ViewHolder holder, int position) {
final BlePeripheral blePeripheral = mBlePeripherals.get(position);
final String identifier = blePeripheral.getIdentifier();
// if (!identifier.equalsIgnoreCase(holder.deviceAddress)) { // only update when changed (to avoid onclicklistener problems)
//Log.d(TAG, "Bind View Holder for address: " + deviceAddress);
// Main view
String name = blePeripheral.getName();
if (name == null) {
name = identifier;
}
holder.deviceAddress = identifier;
holder.nameTextView.setText(name);
final String description = deviceDescription(mContext, blePeripheral);
holder.descriptionTextView.setVisibility(description != null ? View.VISIBLE : View.GONE);
holder.descriptionTextView.setText(description);
final int rssiDrawableResource = RssiUI.getDrawableIdForRssi(blePeripheral.getRssi());
holder.rssiImageView.setImageResource(rssiDrawableResource);
holder.connectButton.setTag(position);
final int connectionState = blePeripheral.getConnectionState();
final String connectionAction = connectionState == BlePeripheral.STATE_DISCONNECTED ? "scanner_connect" : "scanner_disconnect";
holder.connectButton.setText(LocalizationManager.getInstance().getString(mContext, connectionAction));
final WeakReference<BlePeripheral> weakBlePeripheral = new WeakReference<>(blePeripheral);
holder.connectButton.setOnClickListener(view -> {
KeyboardUtils.dismissKeyboard(view);
BlePeripheral selectedBlePeripheral = weakBlePeripheral.get();
if (selectedBlePeripheral != null) {
if (connectionState == BlePeripheral.STATE_DISCONNECTED) {
selectedBlePeripheral.connect(mContext);
} else {
selectedBlePeripheral.disconnect();
}
}
});
holder.view.setOnClickListener(view -> holder.togleExpanded());
// Expanded view
Spanned text = getAdvertisementDescription(mContext, blePeripheral);
holder.dataTextView.setText(text);
holder.rawDataButton.setOnClickListener(v -> mListener.onAdvertisementData(blePeripheral));
}
@Override
public int getItemCount() {
return mBlePeripherals == null ? 0 : mBlePeripherals.size();
}
// region ViewHolder
static class ViewHolder extends RecyclerView.ViewHolder {
View view;
TextView nameTextView;
TextView descriptionTextView;
ImageView rssiImageView;
Button connectButton;
Button rawDataButton;
TextView dataTextView;
String deviceAddress;
private boolean isExpanded = false;
private ViewGroup expandedViewGroup;
ViewHolder(View view) {
super(view);
this.view = view;
nameTextView = view.findViewById(R.id.nameTextView);
descriptionTextView = view.findViewById(R.id.descriptionTextView);
rssiImageView = view.findViewById(R.id.rssiImageView);
connectButton = view.findViewById(R.id.connectButton);
deviceAddress = null;
expandedViewGroup = view.findViewById(R.id.expandedViewGroup);
expandedViewGroup.setVisibility(isExpanded ? View.VISIBLE : View.GONE);
rawDataButton = view.findViewById(R.id.rawDataButton);
dataTextView = view.findViewById(R.id.dataTextView);
}
void togleExpanded() {
isExpanded = !isExpanded;
animateExpanded();
}
private void animateExpanded() {
// expandedViewGroup.setVisibility(isExpanded ? View.VISIBLE:View.GONE);
if (isExpanded) {
AdapterUtils.expand(expandedViewGroup);
} else {
AdapterUtils.collapse(expandedViewGroup);
}
}
}
// endregion
/*
// Trick to show items added on top
// https://stackoverflow.com/questions/43458146/diffutil-in-recycleview-making-it-autoscroll-if-a-new-item-is-added
private boolean mIsFirstItemModified = false;
public boolean getAndResetFirstItemModified() {
boolean result = mIsFirstItemModified;
mIsFirstItemModified = false;
return result;
}
// region ListUpdateCallback
@Override
public void onInserted(int position, int count) {
if (position == 0) {
mIsFirstItemModified = true;
}
notifyItemRangeInserted(position, count);
}
@Override
public void onRemoved(int position, int count) {
notifyItemRangeRemoved(position, count);
}
@Override
public void onMoved(int fromPosition, int toPosition) {
notifyItemMoved(fromPosition, toPosition);
}
@Override
public void onChanged(int position, int count, Object payload) {
notifyItemRangeChanged(position, count, payload);
}
// endregion
*/
}
