android studio简单实现监听系统息屏亮屏的广播

以下是Android Studio简单实现监听系统息屏亮屏的广播的步骤：

1.在AndroidManifest.xml文件中添加权限和广播接收器的声明：

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

<receiver android:name=".ScreenReceiver">
    <intent-filter>
        <action android:name="android.intent.action.SCREEN_ON" />
        <action android:name="android.intent.action.SCREEN_OFF" />
    </intent-filter>
</receiver>

2.创建一个ScreenReceiver类，继承BroadcastReceiver类，并实现onReceive()方法：

public class ScreenReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            // 屏幕亮起时的操作
        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            // 屏幕熄灭时的操作
        }
    }
}

3.在onReceive()方法中添加相应的操作，例如：

public class ScreenReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
            Toast.makeText(context, "屏幕已亮起", Toast.LENGTH_SHORT).show();
        } else if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) {
            Toast.makeText(context, "屏幕已熄灭", Toast.LENGTH_SHORT).show();
        }
    }
}

4.在需要监听屏幕亮灭的Activity中注册广播接收器：

public class MainActivity extends AppCompatActivity {
    private ScreenReceiver mScreenReceiver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mScreenReceiver = new ScreenReceiver();
        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_SCREEN_ON);
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        registerReceiver(mScreenReceiver, filter);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(mScreenReceiver);
    }
}

5.在Activity销毁时注销广播接收器。