安卓8代码串口有数据时唤醒屏幕
时间: 2024-02-01 19:13:19 浏览: 18
可以使用Android系统的AlarmManager来实现这个功能。具体步骤如下:
1. 在AndroidManifest.xml文件中添加以下权限:
```
<uses-permission android:name="android.permission.WAKE_LOCK" />
```
2. 在你的Activity或Service中创建一个WakeLock对象:
```
PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);
WakeLock wakeLock = powerManager.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "MyApp:MyWakeLockTag");
```
其中,SCREEN_BRIGHT_WAKE_LOCK表示唤醒屏幕并设置亮度为最大,ACQUIRE_CAUSES_WAKEUP表示当唤醒锁定被获取时,设备会立即被唤醒。
3. 在串口数据到达时,使用AlarmManager来唤醒屏幕:
```
Intent intent = new Intent(this, MyWakefulReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), pendingIntent);
```
其中,MyWakefulReceiver是一个继承自WakefulBroadcastReceiver的类,用于接收AlarmManager的广播并获取WakeLock对象:
```
public class MyWakefulReceiver extends WakefulBroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
WakeLock wakeLock = powerManager.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "MyApp:MyWakeLockTag");
wakeLock.acquire();
// 处理串口数据
wakeLock.release();
}
}
```
这样,在串口数据到达时,系统会发送广播唤醒屏幕,并在MyWakefulReceiver中获取WakeLock对象,处理完串口数据后释放WakeLock对象,使屏幕自动熄灭。