Android系统亮屏、锁屏、屏幕解锁事件(解决部分手机亮屏后未解锁即进入resume状态)

	/**
	 * screen状态广播接收者
	 */
	private class ScreenBroadcastReceiver extends BroadcastReceiver{
		@Override
		public void onReceive(Context context, Intent intent) {
			if(Intent.ACTION_SCREEN_ON.equals(intent.getAction())){				
				mScreenStateListener.onScreenOn();
			}else if(Intent.ACTION_SCREEN_OFF.equals(intent.getAction())){
				mScreenStateListener.onScreenOff();
			}else if(Intent.ACTION_USER_PRESENT.equals(intent.getAction())){
				mScreenStateListener.onUserPresent();
			}
		}
	}

	/**
	 * 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);
		filter.addAction(Intent.ACTION_USER_PRESENT);
		mContext.registerReceiver(mScreenReceiver, filter);
	}

	//判断屏幕是否被锁定
	public final static boolean isScreenLocked(Context c) {
		android.app.KeyguardManager mKeyguardManager = (KeyguardManager) c.getSystemService(c.KEYGUARD_SERVICE);
		return mKeyguardManager.inKeyguardRestrictedInputMode();
	}

package com.example.myfirstapp;

import java.lang.reflect.Method;

import android.app.Activity;
import android.app.KeyguardManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.PowerManager;
import android.util.Log;

/**
 * 监听屏幕ON和OFF PRESENT状态
 * 
 * @author
 * @2014
 * 
 */
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 (Exception nsme) {
			Log.d(TAG, "API < 7," + nsme);
		}
	}

	/**
	 * screen状态广播接收者
	 */
	private class ScreenBroadcastReceiver extends BroadcastReceiver {
		@Override
		public void onReceive(Context context, Intent intent) {
			if (Intent.ACTION_SCREEN_ON.equals(intent.getAction())) {
				mScreenStateListener.onScreenOn();
			} else if (Intent.ACTION_SCREEN_OFF.equals(intent.getAction())) {
				mScreenStateListener.onScreenOff();
			} else if (Intent.ACTION_USER_PRESENT.equals(intent.getAction())) {
				mScreenStateListener.onUserPresent();
			}
		}
	}

	/**
	 * 请求screen状态更新
	 */
	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);
		filter.addAction(Intent.ACTION_USER_PRESENT);
		mContext.registerReceiver(mScreenReceiver, filter);
	}

	/**
	 * screen是否打开状态
	 */
	private static boolean isScreenOn(PowerManager pm) {
		boolean screenState;
		try {
			screenState = (Boolean) mReflectScreenState.invoke(pm);
		} catch (Exception e) {
			screenState = false;
		}
		return screenState;
	}

	// 外部调用接口
	public interface ScreenStateListener {
		public void onScreenOn();

		public void onScreenOff();

		public void onUserPresent();
	}

	public final static boolean isScreenLocked(Context c) {
		android.app.KeyguardManager mKeyguardManager = (KeyguardManager) c
				.getSystemService(c.KEYGUARD_SERVICE);
		return mKeyguardManager.inKeyguardRestrictedInputMode();
	}
}