带动画的WindowManager(可能吗？)

Question

有没有办法用WindowManager使用Animation(在android的项目中)给视图充气？即使使用网站中的示例,我也无法做到!我用了很多例子,但都没有用!

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,但有两种方法可以为窗口提供动画:

1. 使用WindowManager.LayoutParams.windowAnimations如下:

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

2. 添加额外的"容器"视图,因为WindowManager它不是真实的ViewGroup,因此添加视图的常规动画无法使用它.这个问题已被提出,但它缺乏代码.我会用以下方式应用它:

   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);
       }
   }