Question

我必须使用BroadCastReceivers：一个用于从蓝牙低功耗（BLE）收听数据，另一个用于屏幕状态，如下所示：

private String sreenState="";
public class ScreenStateReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            sreenState="screen on";

        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            Log.i(TAG, "screen on");
            sreenState="screen on";
        }
    }
}


private final BroadcastReceiver mGattUpdateReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        final String action = intent.getAction();

        if (BluetoothLeService.ACTION_DATA_AVAILABLE.equals(action)) {
            String data=intent.getStringExtra(BluetoothLeService.EXTRA_DATA);
            Log.d("TAG",sreenState);
        }
    }
}

在BLE的BroadcastReceiver中，我希望在screenState发生时通过ACTION_DATA_AVAILABLE变量显示屏幕的当前状态。但是，它始终返回屏幕的先前状态。例如，屏幕关闭，我收到数据，它将显示＆＃34; null。＆＃34;如果屏幕打开，我收到数据，则状态结果为关闭。我认为这是同步问题。我怎么解决呢？谢谢大家

Answer 1

您还可以将BLE接收器内的当前屏幕状态读取为：

mIsScreenOn = ((PowerManager) this.getSystemService(Context.POWER_SERVICE)).isScreenOn();

在BroadcastReceivers Android之间传递数据？

1 个答案: