我正在创建一个应用程序,用于从资源中加载可绘制对象并将其显示在占位符ImageView中。 当用户单击按钮加载下一张图像时,我创建了一个动画,该动画将旧图像移动并缩放到新位置,并将新的可绘制对象加载到占位符。
在30张图像之后,我正在运行OOM,这很有意义。
我想做的是在动画结束后对每个图像重新采样,因为我以500X500占位符开始,以1/3结束。
问题在于,完成动画后,ImageView的宽度和高度保持不变。 缩放动画是否应该更改ImageView的宽度和高度?
这是动画的代码:
//create the animation
imageView.setPivotX(0);
imageView.setPivotY(0);
imageView.animate()
.scaleX(scaleX) //about 0.3
.scaleY(scaleY) //about 0.3
.x(finalX) //location x of the image
.y(finalY) //location y of the image
.setListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animation) {
int reqWidth = imageView.getWidth(); //result 500 as expected
int reqHeight = imageView.getHeight();//result 500 as expected
Drawable image = imageView.getDrawable();
}
@Override
public void onAnimationEnd(Animator animation) {
int reqWidth = imageView.getWidth();//result 500 - why?
int reqHeight = imageView.getHeight();//result 500 - why?
Drawable image = imageView.getDrawable();
}
@Override
public void onAnimationCancel(Animator animation) {}
@Override
public void onAnimationRepeat(Animator animation) {}
});
答案 0 :(得分:1)
scaleX()
使View的scaleX属性被动画化为指定值(reference)。它不会直接更改布局的宽度/高度值。 (reference)
通过将scaleX / Y值乘以得到预期的宽度/高度值。
//create the animation
imageView.setPivotX(0);
imageView.setPivotY(0);
imageView.animate()
.scaleX(scaleX) //about 0.3
.scaleY(scaleY) //about 0.3
.x(finalX) //location x of the image
.y(finalY) //location y of the image
.setListener(new Animator.AnimatorListener() {
@Override
public void onAnimationStart(Animator animation) {
int reqWidth = imageView.getWidth(); //result 500 as expected
int reqHeight = imageView.getHeight();//result 500 as expected
Drawable image = imageView.getDrawable();
}
@Override
public void onAnimationEnd(Animator animation) {
int reqWidth = imageView.getWidth() * imageView.getScaleX;
int reqHeight = imageView.getHeight() * imageView.getScaleY;
Drawable image = imageView.getDrawable();
}
@Override
public void onAnimationCancel(Animator animation) {}
@Override
public void onAnimationRepeat(Animator animation) {}
});