Android监听屏幕是否锁屏

package com.isoft.screen; import java.lang.reflect.Method; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.PowerManager; import android.util.Log; /** * * @author zhangyg * */ public class ScreenObserver{ private static String TAG = "ScreenObserver"; private Context mContext; private ScreenBroadcastReceiver mScreenReceiver; private ScreenStateListener mScreenStateListener; private static Method mReflectScreenState; public ScreenObserver(Context context){ mContext = context; mScreenReceiver = new ScreenBroadcastReceiver(); try { mReflectScreenState = PowerManager.class.getMethod("isScreenOn", new Class[] {}); } catch (NoSuchMethodException nsme) { Log.d(TAG, "API < 7," + nsme); } } /** * screen状态广播接收者 * @author zhangyg * */ 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)){ mScreenStateListener.onScreenOn(); }else if(Intent.ACTION_SCREEN_OFF.equals(action)){ mScreenStateListener.onScreenOff(); } } } /** * 请求screen状态更新 * @param listener */ public void requestScreenStateUpdate(ScreenStateListener listener) { mScreenStateListener = listener; startScreenBroadcastReceiver(); firstGetScreenState(); } /** * 第一次请求screen状态 */ private void firstGetScreenState(){ PowerManager manager = (PowerManager) mContext .getSystemService(Activity.POWER_SERVICE); if (isScreenOn(manager)) { if (mScreenStateListener != null) { mScreenStateListener.onScreenOn(); } } else { if (mScreenStateListener != null) { mScreenStateListener.onScreenOff(); } } } /** * 停止screen状态更新 */ public void stopScreenStateUpdate(){ mContext.unregisterReceiver(mScreenReceiver); } /** * 启动screen状态广播接收器 */ private void startScreenBroadcastReceiver(){ IntentFilter filter = new IntentFilter(); filter.addAction(Intent.ACTION_SCREEN_ON); filter.addAction(Intent.ACTION_SCREEN_OFF); mContext.registerReceiver(mScreenReceiver, filter); } /** * screen是否打开状态 * @param pm * @return */ private static boolean isScreenOn(PowerManager pm) { boolean screenState; try { screenState = (Boolean) mReflectScreenState.invoke(pm); } catch (Exception e) { screenState = false; } return screenState; } public interface ScreenStateListener { public void onScreenOn(); public void onScreenOff(); } }