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      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 
     25     public void onReceive(Context context, Intent intent) {
     26         onConnectionChanged(context, intent);
     27     }
     28 
     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 
     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