具有动画的WindowManager（可以吗？）

我不确定您的任务的确切要求，但是有两种方法可以向窗口提供动画：

1. 用法

   WindowManager.LayoutParams.windowAnimations

   如下：

   params.windowAnimations = android.R.style.Animation_Translucent;

2. 添加附加的“容器”视图，因为

   WindowManager

   它不是真实的

   ViewGroup

   ，因此添加视图的普通动画无法使用。已经问过这个问题，但是缺少代码。我将通过以下方式应用它：

   public class BannerLayout extends View {private final Context mContext;private final ViewGroup mPopupLayout;private final ViewGroup mParentView;public BannerLayout(Activity activity, final Context context) {    super(context);    mContext = context;    final WindowManager.LayoutParams params = new WindowManager.LayoutParams( WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY, WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN |         WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH, PixelFormat.TRANSLUCENT);    final WindowManager mWinManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);    mPopupLayout = (RelativeLayout) inflater.inflate(R.layout.popup_activity, null);    mPopupLayout.setVisibility(GONE);    params.width = ActionBar.LayoutParams.WRAP_CONTENT;    params.height = ActionBar.LayoutParams.WRAP_CONTENT;    // Default variant    // params.windowAnimations = android.R.style.Animation_Translucent;    mParentView = new frameLayout(mContext);    mWinManager.addView(mParentView, params);    mParentView.addView(mPopupLayout);    mPopupLayout.setVisibility(GONE);}public void show(){    final Animation in = AnimationUtils.loadAnimation(this.mContext, android.R.anim.fade_in);    in.setDuration(2000);    mPopupLayout.setVisibility(VISIBLE);    mPopupLayout.startAnimation(in);}public void hide() {    mPopupLayout.setVisibility(GONE);}

   }