最近要做个小项目,其中有需要禁止home键的需求,一开始以为不可以,感觉得root一下才行,后来查了一下,发现还是不少朋友都实现了这个功能,现在也引用一下,供大家参考一下:
1. 在activity中加上这段代码就可以屏蔽home键(onKeyDown事件会捕捉到home键)。
public void onAttachedToWindow()
{
this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
super.onAttachedToWindow();
}
2.因为android系统自己对与home键power键在PhoneWindowManager中做了处理,不会返回到上层应用的。以下为系统源码:
frameworkspoliciesasephonecomandroidinternalpolicyimplPhoneWindowManager.java 1089行
if (code == KeyEvent.KEYCODE_HOME) {
// If a system window has focus, then it doesn't make sense
// right now to interact with applications.
WindowManager.LayoutParams attrs = win != null ? win.getAttrs() : null;
if (attrs != null) {
final int type = attrs.type;
if (type == WindowManager.LayoutParams.TYPE_KEYGUARD
|| type == WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG) {
// the "app" is keyguard, so give it the key
return false;
}
final int typeCount = WINDOW_TYPES_WHERE_HOME_DOESNT_WORK.length;
for (int i=0; i<typeCount; i++) {
if (type == WINDOW_TYPES_WHERE_HOME_DOESNT_WORK[i]) {
// don't do anything, but also don't pass it to the app
return true;
}
}
}
type == WindowManager.LayoutParams.TYPE_KEYGUARD这一句,我们可以看到,android对于锁屏特殊判断了,所以我就模拟这个进行的实现,只是有一点,activity中重写onAttachedToWindow()方法需要api 5以上。
摘自 xiaoxiaobian3310903的专栏