BluetoothStateManager.java 文件源码

@Override
public void onReceive(Context context, Intent intent) {
  if (intent == null) return;
  Log.w(TAG, "onReceive");

  synchronized (LOCK) {
    if (getScoChangeIntent().equals(intent.getAction())) {
      int status = intent.getIntExtra(AudioManager.EXTRA_SCO_AUDIO_STATE, AudioManager.SCO_AUDIO_STATE_ERROR);

      if (status == AudioManager.SCO_AUDIO_STATE_CONNECTED) {
        if (Build.VERSION.SDK_INT >= 11 && bluetoothHeadset != null) {
          List<BluetoothDevice> devices = bluetoothHeadset.getConnectedDevices();

          for (BluetoothDevice device : devices) {
            if (bluetoothHeadset.isAudioConnected(device)) {
              int deviceClass = device.getBluetoothClass().getDeviceClass();

              if (deviceClass == BluetoothClass.Device.AUDIO_VIDEO_HANDSFREE ||
                  deviceClass == BluetoothClass.Device.AUDIO_VIDEO_CAR_AUDIO ||
                  deviceClass == BluetoothClass.Device.AUDIO_VIDEO_WEARABLE_HEADSET)
              {
                scoConnection = ScoConnection.CONNECTED;

                if (wantsConnection) {
                  AudioManager audioManager = ServiceUtil.getAudioManager(context);
                  audioManager.setBluetoothScoOn(true);
                }
              }
            }
          }

        }
      }
    }
  }

  handleBluetoothStateChange();
}