andorid popupwindow 更新时动画的实现，可实现一个窗口被一个窗口推上去的效果

 1 import android.animation.ObjectAnimator;
 2 import android.annotation.SuppressLint;
 3 import android.content.Context;
 4 import android.graphics.drawable.BitmapDrawable;
 5 import android.util.AttributeSet;
 6 import android.view.LayoutInflater;
 7 import android.view.View;
 8 import android.widget.PopupWindow;
 9 import android.widget.TextView;
10 
11 public class NotePopWindow extends PopupWindow {
12     private TextView mNodeTextView;
13     private Context mContext;
14     private ViewWrapper mWrapper;
15 
16     public NotePopWindow(Context context, int width, int height) {
17         super(LayoutInflater.from(context).inflate(R.layout.fullscreen_view_note_popwindow, null), width, height);
18         mContext = context;
19         setBackgroundDrawable(new BitmapDrawable());
20         setAnimationStyle(R.style.anim_note_bottombar);
21         initViews();
22     }
23 
24     public NotePopWindow(Context context) {
25         super(context);
26 
27     }
28 
29     public NotePopWindow(Context context, AttributeSet attributeSet) {
30         super(context, attributeSet);
31     }
32 
33     private void initViews() {
34         mNodeTextView = (TextView) getContentView().findViewById(R.id.note_view);
35         mWrapper = new ViewWrapper(getContentView());
36     }
37 
38     @SuppressLint("NewApi")
39     public void startUpAnimation() {
40         ObjectAnimator translationRight = ObjectAnimator.ofInt(mWrapper, "Y", (int) mContext.getResources()
41                 .getDimension(R.dimen.bottom_menu_window_height));
42         translationRight.setDuration(540);
43         translationRight.start();
44     }
45 
46     @SuppressLint("NewApi")
47     public void startDownAnimation() {
48         ObjectAnimator translationRight = ObjectAnimator.ofInt(mWrapper, "Y", 0);
49         translationRight.setDuration(360);
50         translationRight.start();
51     }
52 
53     private class ViewWrapper {
54         private View mTarget;
55         private boolean isUp = true;
56 
57         public ViewWrapper(View target) {
58             setmTarget(target);
59         }
60 
61         @SuppressWarnings("unused")
62         public int getY() {
63             if (isUp) {
64                 isUp = false;
65                 return 0;
66 
67             } else {
68                 isUp = true;
69                 return (int) mContext.getResources().getDimension(R.dimen.bottom_menu_window_height);
70             }
71 
72         }
73 
74         @SuppressWarnings("unused")
75         public void setY(int height) {
76             update(0, height, -1, -1);
77         }
78 
79         @SuppressWarnings("unused")
80         public View getmTarget() {
81             return mTarget;
82         }
83 
84         public void setmTarget(View mTarget) {
85             this.mTarget = mTarget;
86         }
87     }
88 }