Android 监听锁屏/开屏事件

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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();    }}

5. 参考文献

[1] Android 监听屏幕解锁事件 http://blog.csdn.net/gf771115/article/details/7991892

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