更改XML動畫機器人動態代碼

Question

我有這樣的動畫：

<?xml version="1.0" encoding="utf-8"?> 
<set xmlns:android="http://schemas.android.com/apk/res/android" 
    android:interpolator="@android:anim/decelerate_interpolator"> 
    <scale android:fromXScale="1.0" android:toXScale="2.0" 
    android:fromYScale="1.0" android:toYScale="2.0" 
    android:pivotX="50%p" android:pivotY="50%p" 
    android:duration="2000" /> 
</set> 

但我要讓它在我的代碼動態：

AnimationSet animSet = new AnimationSet(false); 
animSet.setInterpolator(AnimationUtils.loadInterpolator(AddPhoto.this, 
    android.R.anim.decelerate_interpolator)); 
ScaleAnimation zoom = new ScaleAnimation(1.0f, 1.0f, 2.0f, 2.0f); 
    zoom.setDuration(2000); 
    animSet.addAnimation(zoom); 

但它是不一樣的，我做了什麼錯誤？謝謝。

Answer 1

您忘記設置PivotX和PivotY。使用以下ScaleAnimator構造函數

public ScaleAnimation (float fromX, float toX, float fromY, float toY, 
         float pivotX, float pivotY) 


Parameters 

fromX Horizontal scaling factor to apply at the start of the animation 
toX Horizontal scaling factor to apply at the end of the animation 
fromY Vertical scaling factor to apply at the start of the animation 
toY Vertical scaling factor to apply at the end of the animation 
pivotX The X coordinate of the point about which the object is being scaled, 
      specified as an absolute number where 0 is the left edge. (This point 
      remains fixed while the object changes size.) 
pivotY The Y coordinate of the point about which the object is being scaled, 
      specified as an absolute number where 0 is the top edge. (This point 
      remains fixed while the object changes size.)