android 监听HOME键和开关屏的工具类

public class ScreenListenerService {

	Context mContext;
	ScreenBroadcastReceiver mScreenBroadcastReceiver;
	ScreenStateListener mScreenStateListener;

	public ScreenListenerService(Context context) {
		mContext = context;
		mScreenBroadcastReceiver = new ScreenBroadcastReceiver();
	}

	private class ScreenBroadcastReceiver extends BroadcastReceiver {
		String action = null;

		@Override
		public void onReceive(Context context, Intent intent) {
			// TODO Auto-generated method stub
			action = intent.getAction();
			if (Intent.ACTION_SCREEN_ON.equals(action)) {
				mScreenStateListener.OnScreenOn();
			} else if (Intent.ACTION_SCREEN_OFF.equals(action)) {
				mScreenStateListener.OnScreenOff();
			} else if (Intent.ACTION_USER_PRESENT.equals(action)) { // 解锁
                mScreenStateListener.OnUserPresent();
            }
		}
	}

	public void begin(ScreenStateListener listener) {
		mScreenStateListener = listener;
		getScreenState();
		registerListener();
	}

	@SuppressLint("NewApi")
	private void getScreenState() {
		PowerManager manager = (PowerManager) mContext
				.getSystemService(Context.POWER_SERVICE);
		if (manager.isScreenOn()) {
			if (null != mScreenStateListener) {
				mScreenStateListener.OnScreenOn();
			}
		} else {
			if (null != mScreenStateListener) {
				mScreenStateListener.OnScreenOff();
			}
		}
	}

	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(mScreenBroadcastReceiver, filter);
	}
	
	public void unregisterListener(){
		mContext.unregisterReceiver(mScreenBroadcastReceiver);
	}

	public interface ScreenStateListener {
		public void OnScreenOn();

		public void OnScreenOff();

		 public void OnUserPresent();
	}
	
//	public static String getCurrentActivityName(Context context){
//		ActivityManager am = (ActivityManager) context.getSystemService(Activity.ACTIVITY_SERVICE);
//		List<ActivityManager.RunningTaskInfo> task = am.getRunningTasks(1);
//		ComponentName compInfo = task.get(0).topActivity;
//		
//		return compInfo.getClassName();
//	}

}
           

public class HomeBroadcast {

	Context mContext;
	HomekeyListener mHomekeyListener;
	HomeReceiver hr;
	public static boolean isHome = false;

	public HomeBroadcast(Context context) {
		mContext = context;
		hr = new HomeReceiver();
	}

	private class HomeReceiver extends BroadcastReceiver {
		String SYSTEM_REASON = "reason";
		String SYSTEM_HOME_KEY = "homekey";
		String SYSTEM_HOME_KEY_LONG = "recentapps";

		@Override
		public void onReceive(Context context, Intent intent) {
			String action = intent.getAction();
			if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {
				String reason = intent.getStringExtra(SYSTEM_REASON);
				if (TextUtils.equals(reason, SYSTEM_HOME_KEY)) {
					HomePage.songPause();
					mHomekeyListener.onHomekeyDownListener();
				}

			}
		}

	}

	public void begin(HomekeyListener listener) {
		mHomekeyListener = listener;
		mContext.registerReceiver(hr, new IntentFilter(
				Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
	}

	public void unregister() {
		mContext.unregisterReceiver(hr);
	}

	public interface HomekeyListener {
		public void onHomekeyDownListener();
	}

}
           

记录一下。方便以后用