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基于android4.4
一、屏幕的HOME键
做了一个锁屏app替换系统的app ，但是在应用层是无法屏蔽home键的，找了资料，改了源码，终于解决
代码位置frameworks\base\policy\src\com\android\internal\policy\impl\PhoneWindowManager.java下的
定位到名为interceptKeyBeforeDispatching 的函数
从函数名我们可以知道此函数是是在分发按键消息之前进行拦截。
查看对KEYCODE_HOME home键的处理
// First we always handle the home key here, so applications// can never break it, although if keyguard is on, we do let// it handle it, because that gives us the correct 5 second// timeout.if (keyCode == KeyEvent.KEYCODE_HOME) {// If we have released the home key, and didn't do anything else// while it was pressed, then it is time to go home!if (!down) {cancelPreloadRecentApps();mHomePressed = false;if (mHomeConsumed) {mHomeConsumed = false;return -1;}if (canceled) {Log.i(TAG, "Ignoring HOME; event canceled.");return -1;}// If an incoming call is ringing, HOME is totally disabled.// (The user is already on the InCallScreen at this point,// and his ONLY options are to answer or reject the call.)try {ITelephony telephonyService = getTelephonyService();if (telephonyService != null && telephonyService.isRinging()) {Log.i(TAG, "Ignoring HOME; there's a ringing incoming call.");return -1;}} catch (RemoteException ex) {Log.w(TAG, "RemoteException from getPhoneInterface()", ex);}// Delay handling home if a double-tap is possible.if (mDoubleTapOnHomeBehavior != DOUBLE_TAP_HOME_NOTHING) {mHandler.removeCallbacks(mHomeDoubleTapTimeoutRunnable); // just in casemHomeDoubleTapPending = true;mHandler.postDelayed(mHomeDoubleTapTimeoutRunnable,ViewConfigurati这篇关于Android系统应用开发（七）屏蔽Home键和屏幕的唤醒和休眠,AlarmManager的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
