1 package com.android.tv.settings.accessories; 2 3 import android.bluetooth.BluetoothAdapter; 4 import android.bluetooth.BluetoothDevice; 5 import android.content.BroadcastReceiver; 6 import android.content.Context; 7 import android.content.Intent; 8 import android.content.SharedPreferences; 9 import android.support.v4.content.LocalBroadcastManager; 10 import android.text.TextUtils; 11 12 import com.android.tv.settings.MainSettings; 13 14 import java.util.HashSet; 15 import java.util.Set; 16 17 public class BluetoothConnectionsManager extends BroadcastReceiver { 18 private static final String PREFS_NAME = "bt-connected-devs"; 19 private static final String KEY_CONNECTED_SET = "conencted-set"; 20 private static final String KEY_BT_STATE = "bt-state"; 21 22 public static final String ACTION_BLUETOOTH_UPDATE = 23 "BluetoothConnectionsManager.BLUETOOTH_UPDATE"; 24 onReceive(Context context, Intent intent)25 public void onReceive(Context context, Intent intent) { 26 onConnectionChanged(context, intent); 27 } 28 onConnectionChanged(Context context, Intent intent)29 public static void onConnectionChanged(Context context, Intent intent) { 30 final String action = intent.getAction(); 31 32 final SharedPreferences prefs = 33 context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); 34 Set<String> connected = prefs.getStringSet(KEY_CONNECTED_SET, new HashSet<String>()); 35 int btState = prefs.getInt(KEY_BT_STATE, BluetoothAdapter.STATE_OFF); 36 37 boolean listChanged = false; 38 boolean btStateChanged = false; 39 40 if (TextUtils.equals(action, BluetoothAdapter.ACTION_STATE_CHANGED)) { 41 final int newBtState = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, 42 BluetoothAdapter.ERROR); 43 44 if (btState != newBtState) { 45 // if BT was just turned off, we can't be connected to any devices. 46 // if BT was just turned on, we haven't had the time to connect to any devices yet. 47 if (newBtState == BluetoothAdapter.STATE_ON || 48 newBtState == BluetoothAdapter.STATE_OFF) { 49 listChanged = true; 50 connected.clear(); 51 } 52 53 btStateChanged = true; 54 btState = newBtState; 55 } 56 } else if (intent.getExtras() != null) { 57 BluetoothDevice device = intent.getExtras().getParcelable(BluetoothDevice.EXTRA_DEVICE); 58 if (device != null) { 59 if (TextUtils.equals(action, BluetoothDevice.ACTION_ACL_CONNECTED)) { 60 listChanged = connected.add(device.getAddress()); 61 } else if (TextUtils.equals(action, BluetoothDevice.ACTION_ACL_DISCONNECTED)) { 62 listChanged = connected.remove(device.getAddress()); 63 } 64 } 65 } 66 67 if (btStateChanged || listChanged) { 68 SharedPreferences.Editor editor = prefs.edit(); 69 70 if (btStateChanged) { 71 editor.putInt(KEY_BT_STATE, btState); 72 } 73 if (listChanged) { 74 editor.putStringSet(KEY_CONNECTED_SET, connected); 75 } 76 77 editor.apply(); 78 } 79 80 if (listChanged) { 81 LocalBroadcastManager.getInstance(context) 82 .sendBroadcast(new Intent(ACTION_BLUETOOTH_UPDATE)); 83 } 84 } 85 getConnectedSet(Context context)86 public static Set<String> getConnectedSet(Context context) { 87 SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); 88 return prefs.getStringSet(KEY_CONNECTED_SET, new HashSet<String>()); 89 } 90 } 91