Android 应用监听亮灭屏状态

要监听 Android 应用的亮灭屏状态，可以使用 BroadcastReceiver 和 Intent 进行实现。具体步骤如下：

1. 在 AndroidManifest.xml 文件中添加权限：

<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.DISABLE_KEYGUARD" />

2. 创建一个 BroadcastReceiver 类：

public class ScreenBroadcastReceiver extends BroadcastReceiver {

    private boolean isScreenOn = true;
    private ScreenStateListener listener;

    public ScreenBroadcastReceiver(ScreenStateListener listener) {
        this.listener = listener;
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            isScreenOn = false;
            listener.onScreenOff();
        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            isScreenOn = true;
            listener.onScreenOn();
        }
    }

    public boolean isScreenOn() {
        return isScreenOn;
    }

    public interface ScreenStateListener {
        void onScreenOn();

        void onScreenOff();
    }
}

3. 注册 BroadcastReceiver：

ScreenBroadcastReceiver screenReceiver = new ScreenBroadcastReceiver(new ScreenBroadcastReceiver.ScreenStateListener() {
    @Override
    public void onScreenOn() {
        // 亮屏时的操作
    }

    @Override
    public void onScreenOff() {
        // 熄屏时的操作
    }
});

IntentFilter screenFilter = new IntentFilter();
screenFilter.addAction(Intent.ACTION_SCREEN_ON);
screenFilter.addAction(Intent.ACTION_SCREEN_OFF);
registerReceiver(screenReceiver, screenFilter);

这样就可以监听 Android 应用的亮灭屏状态了。注意：在不需要监听时，要及时注销 BroadcastReceiver，避免资源浪费。