有这样的需求: 将一个窗口放在Appplication的所有Activity的最上面，该如何做到呢?
答案是:
private ImageView waitView;
private final void showWaiting() {
try {
WindowManager.LayoutParams lp = null;
lp = new WindowManager.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.TYPE_TOAST,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE
| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON,
PixelFormat.TRANSLUCENT
| WindowManager.LayoutParams.FIRST_SYSTEM_WINDOW);
WindowManager mWindowManager = (WindowManager) G.appInstance
.getSystemService(Context.WINDOW_SERVICE);
if (waitView == null) {
LayoutInflater inflate = (LayoutInflater) G.appInstance
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
waitView = (ImageView) inflate.inflate(R.layout.waiting_layout,
null);
}
mWindowManager.addView(waitView, lp);
} catch (Throwable e) {
}
}
注意粗体部分的代码:
1. 要将window的类型配置成Type_toast。
2.G.appInstance 上下文需要使用Application的context.
