public void show() {
if (cookieView != null) {
final ViewGroup decorView = (ViewGroup) context.getWindow().getDecorView();
final ViewGroup content = (ViewGroup) decorView.findViewById(android.R.id.content);
if (cookieView.getParent() == null) {
if (cookieView.getLayoutGravity() == Gravity.BOTTOM) {
content.addView(cookieView);
} else {
decorView.addView(cookieView);
}
}
}
}
private final class DecorView extends FrameLayout implements RootViewSurfaceTaker {
decorView 是一个帧布局，最后调用的addView所添加的View对象，自然而然显示在decorView中的最上层
实现来源 https://github.com/liuguangqiang/CookieBar
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