Android 监听锁屏/开屏事件

1. 两种方案

（1） 监听BroadcastReceiver

（2）获取PowerManager事件

2.  BroadcastReceiver

2.1. 事件

总共有3个事件：

Intent.ACTION_SCREEN_ON ： 屏幕点亮  Intent.ACTION_SCREEN_OFF ：屏幕关闭  Intent.ACTION_USER_PRESENT： 用户解锁

2.2. 权限

监听用户解锁需要在AndroidManifest中注册权限

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

2.3. IntentFilter代码

    if (mContext != null) {            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);        }  

3. PowerManager

    PowerManager manager = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);        if (manager.isScreenOn()) {            if (mScreenStateListener != null) {                mScreenStateListener.onScreenOn();            }        } else {            if (mScreenStateListener != null) {                mScreenStateListener.onScreenOff();            }        }  

4. Code

    import android.annotation.SuppressLint;        import android.content.BroadcastReceiver;        import android.content.Context;        import android.content.Intent;        import android.content.IntentFilter;        import android.os.PowerManager;                /**         * Created by xiyanglu on 4/11/15.         */        public class ScreenObserver {            private Context mContext;            private ScreenBroadcastReceiver mScreenReceiver;            private ScreenStateListener mScreenStateListener;                    public ScreenObserver(Context context) {                mContext = context;                mScreenReceiver = new ScreenBroadcastReceiver();            }                    public void startObserver(ScreenStateListener listener) {                mScreenStateListener = listener;                registerListener();                getScreenState();            }                    public void shutdownObserver() {                unregisterListener();            }                    /**             * 获取screen状态             */            @SuppressLint("NewApi")            private void getScreenState() {                if (mContext == null) {                    return;                }                        PowerManager manager = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);                if (manager.isScreenOn()) {                    if (mScreenStateListener != null) {                        mScreenStateListener.onScreenOn();                    }                } else {                    if (mScreenStateListener != null) {                        mScreenStateListener.onScreenOff();                    }                }            }                    private void registerListener() {                if (mContext != null) {                    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);                }            }                    private void unregisterListener() {                if (mContext != null)                    mContext.unregisterReceiver(mScreenReceiver);            }                            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();                    }                }            }                    public interface ScreenStateListener {// 返回给调用者屏幕状态信息                public void onScreenOn();                        public void onScreenOff();                        public void onUserPresent();            }        }