Android(安卓)4.4、5.1、6.0 屏蔽Home键

最近项目有这样的需要所以研究了一下着块的内容.....刚开始在度娘了一大堆要么支持2.3之前的要么是...反正都是这个复制那个没么卵用的办法.. 我想先说明一点想在应用上彻底屏蔽Home是不可能,要想屏蔽只能去改系统源码。好了,下面就看是怎么改的首先改第一处: 源码位置在frameworks\base\services\core\ Java \com\ Android \server\wm\WindowManagerService.java relayoutWindow方法中找到这一段 if (attrs != null) { if (win.mAttrs.type != attrs.type) { Slog.e(TAG, "Window : " + win + "changes the window type!!"); Slog.e(TAG, "Original type : " + win.mAttrs.type); Slog.e(TAG, "Changed type : " + attrs.type); throw new IllegalArgumentException( "Window type can not be changed after the window is added."); }
百度上有一种方法是复写 @Override public void onAttachedToWindow() { this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD); super.onAttachedToWindow(); } 这种方法原来的确是可以的,但是由于安全方面的原因，google已经屏蔽这个方法了，一用就会报错,要想不会报错，我们就要注释掉这里
接下来修改第二处: 源码位置在frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java 在interceptKeyBeforeDispatching方法找到if (keyCode == KeyEvent.KEYCODE_HOME)时的处理 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; } // Delay handling home if a double-tap is possible. if (mDoubleTapOnHomeBehavior != DOUBLE_TAP_HOME_NOTHING) { mHandler.removeCallbacks(mHomeDoubleTapTimeoutRunnable); // just in case mHomeDoubleTapPending = true; mHandler.postDelayed(mHomeDoubleTapTimeoutRunnable, ViewConfiguration.getDoubleTapTimeout()); return -1; } handleShortPressOnHome(); return -1; }
WindowManager.LayoutParams attrs = win != null ? win.getAttrs() : null; if (attrs != null) { final int type = attrs.type; if (type == WindowManager.LayoutParams.TYPE_KEYGUARD_SCRIM || type == WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG || (attrs.privateFlags & PRIVATE_FLAG_KEYGUARD) != 0) { // the "app" is keyguard, so give it the key return 0; } final int typeCount = WINDOW_TYPES_WHERE_HOME_DOESNT_WORK.length; for (int i=0; i if (type == WINDOW_TYPES_WHERE_HOME_DOESNT_WORK[i]) { // don't do anything, but also don't pass it to the app return -1; } } } 看到这段系统会先判断窗口的类型，然后再通过handleShortPressOnHome();这个方法去返回到桌面,这就好办了，我们刚第一步已经把 WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG这个类型给开放出来了..只需要加个标记去判断要不要返回到主界面就可以了,这样子改
1：首先加个是否回到桌面的标记 2：在要返回桌面的方法进行判断(true 返回桌面,false 不返回桌面并发送广播) 3：加个类型判断当时这个类型时我们让标记为false
到此位置我们源码的改动就完成了，最后上层要用的话只需要在要屏蔽Home键的当前Activity中复写onAttachedToWindow
@Override public void onAttachedToWindow() { this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG); super.onAttachedToWindow(); }

//需要的话自己在这个地方再加个接收这个home键发出的广播 }

涉及到的改动的java文件下载地址(已改动)

http://download.csdn.net/detail/u013286571/9902565

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