具有动画的WindowManager（可以吗？）

Question

有什么方法可以使用Animation在Android的项目中使用WindowManager扩展视图吗？即使使用网站中的示例，我也做不到！我使用了许多示例，但没有一个有效！

public BannerLayout(Activity activity, final Context context) {
    super(context);

    this.context = 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);

    wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);

    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    this.popupLayout = (RelativeLayout) inflater.inflate(R.layout.popup_activity, null);
    this.popupLayout.setVisibility(GONE);
    this.setActive(false);

    wm.addView(this.popupLayout, params);

    context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}


private void show(){
    Animation in = AnimationUtils.loadAnimation(this.context, android.R.anim.fade_in);
    this.popupLayout.setAnimation(in);

    this.setActive(true);
    this.popupLayout.setVisibility(VISIBLE);
}

Answer 1

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);
   }
   
   /**
    * Shows view
    */
   public void show(){
       final Animation in = AnimationUtils.loadAnimation(this.mContext, android.R.anim.fade_in);
   
       in.setDuration(2000);
   
       mPopupLayout.setVisibility(VISIBLE);
       mPopupLayout.startAnimation(in);
   }
   
   /**
    * Hides view
    */
   public void hide() {
       mPopupLayout.setVisibility(GONE);
   }
   

   }