android屏幕状态检测, 动态广播

最新推荐文章于 2021-07-22 17:00:27 发布

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最新推荐文章于 2021-07-22 17:00:27 发布

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分类专栏： android 文章标签： android

本文链接：https://blog.youkuaiyun.com/qq_20566617/article/details/78649009

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这是一个关于如何在Android中检测屏幕状态并使用动态广播的工具类介绍。通过调用相关方法，开发者可以实现对设备屏幕开启或关闭事件的监听。

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//此为监听屏幕状态的工具类

public class ScreenListenerUtils {
        private Context mContext;
        private ScreenBroadcastReceiver mScreenReceiver;
        private ScreenStateListener mScreenStateListener;

    public ScreenListenerUtils(Context context) {
        mContext = context;
        mScreenReceiver = new ScreenBroadcastReceiver();
    }

    //screen状态广播接收者
    private class ScreenBroadcastReceiver extends BroadcastReceiver {
        private String action = null;

        @Override
        public void onReceive(Context context, Intent intent) {
            action = intent.getAction();
            if (Intent.ACTION_SCREEN_ON.equals(action)) { // 开屏
                mScreenStateListener.onScreenOn();
            } else if (Intent.ACTION_SCREEN_OFF.equals(action)) { // 锁屏
                mScreenStateListener.onScreenOff();
            } else if (Intent.ACTION_USER_PRESENT.equals(action)) { // 解锁
                mScreenStateListener.onUserPresent();
            }
        }
    }


    //开始监听screen状态
    public void begin(ScreenStateListener listener) {
        mScreenStateListener = listener;
        registerListener();
        getScreenState();
    }

    //获取screen状态
    private void getScreenState() {
        PowerManager manager = (PowerManager) mContext
                .getSystemService(Context.POWER_SERVICE);
        if (manager.isScreenOn()) {
            if (mScreenStateListener != null) {
                mScreenStateListener.onScreenOn();
            }
        } else {
            if (mScreenStateListener != null) {
                mScreenStateListener.onScreenOff();
            }
        }
    }

    // 停止screen状态监听
    public void unregisterListener() {
        mContext.unregisterReceiver(mScreenReceiver);
    }

    // 启动screen状态广播接收器
    private void registerListener() {
        IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_SCREEN_ON);
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        filter.addAction(Intent.ACTION_USER_PRESENT);
        mContext.registerReceiver(mScreenReceiver, filter);
    }

    // 返回给调用者屏幕状态信息
    public interface ScreenStateListener {
        public void onScreenOn();

        public void onScreenOff();

        public void onUserPresent();
    }
}

//在需要使用的地方调用即可

public class MyService extend Service{

    private Context mContext;
    private ScreenListenerUtils screenListenerUtils;

    @Override
    public IBinder onBind(Intent intent) {
        return binder;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return START_STICKY;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        this.mContext = this;
        //屏幕状态广播监听
        screenListenerUtils = new ScreenListenerUtils(mContext);
        screenListenerUtils.begin(new ScreenListenerUtils.ScreenStateListener() {
            @Override
            public void onUserPresent() {  // 0息屏  1解锁界面  2 正在使用
                //正在使用
            }

            @Override
            public void onScreenOn() {
                //解锁界面
            }

            @Override
            public void onScreenOff() {
                //息屏
            }
        });
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (screenListenerUtils != null) {
            screenListenerUtils.unregisterListener();
            screenListenerUtils = null;
        }
    }
}