如何在Android中创建移动/调整动画大小？

Question

有人知道Android动画吗？我想要创建如下内容：

• 我在设备屏幕的中心有一个大图像;
• 这个图像变得很小（通过动画），并转到我的设备屏幕的一角;

它像在这种波纹管顺序：

任何提示将是非常赞赏！提前致谢！

Answer 1

使用ViewPropertyAnimator，使用方法如scaleXBy()和translateYBy()。您通过在API Level 11+上的View上致电animate()获得ViewPropertyAnimator。如果您支持较旧的设备，则NineOldAndroids可提供接近工作的回送。

您可能还希望阅读：

• http://android-developers.blogspot.com/2011/05/introducing-viewpropertyanimator.html
• http://developer.android.com/guide/topics/graphics/prop-animation.html

Answer 2

我与同步旋转和运动的一类。这是昂贵的，但它适用于所有API版本。

public class ResizeMoveAnimation extends Animation { 
    View view; 
    int fromLeft; 
    int fromTop; 
    int fromRight; 
    int fromBottom; 
    int toLeft; 
    int toTop; 
    int toRight; 
    int toBottom; 

    public ResizeMoveAnimation(View v, int toLeft, int toTop, int toRight, int toBottom) { 
     this.view = v; 
     this.toLeft = toLeft; 
     this.toTop = toTop; 
     this.toRight = toRight; 
     this.toBottom = toBottom; 

     fromLeft = v.getLeft(); 
     fromTop = v.getTop(); 
     fromRight = v.getRight(); 
     fromBottom = v.getBottom(); 

     setDuration(500); 
    } 

    @Override 
    protected void applyTransformation(float interpolatedTime, Transformation t) { 

     float left = fromLeft + (toLeft - fromLeft) * interpolatedTime; 
     float top = fromTop + (toTop - fromTop) * interpolatedTime; 
     float right = fromRight + (toRight - fromRight) * interpolatedTime; 
     float bottom = fromBottom + (toBottom - fromBottom) * interpolatedTime; 

     RelativeLayout.LayoutParams p = (LayoutParams) view.getLayoutParams(); 
     p.leftMargin = (int) left; 
     p.topMargin = (int) top; 
     p.width = (int) ((right - left) + 1); 
     p.height = (int) ((bottom - top) + 1); 

     view.requestLayout(); 
    } 
}