Android：当动画在画廊中停止时，如何将低质量图像更改为高质量图像？

Question

I want to do an image gallery like in iphone. I want to show low quality (pre-resized) images and when the image is active I want to process the big image and show the result in the gallery.

I have two questions. How to attach a listener on the animation stop in gallery? And how to access an image after this action?

Answer 1

You can set an AnimationListener on your animation, and override the onAnimationEnd method.

From http://www.roosmaa.net/animation-ended-callback/ :

ImageView viewN = ..;
Animation animN = ...;
Drawable myNewDrawable = ...;
animN.setAnimationListener(new AnimationListener() {
    // ...
    void onAnimationEnd(Animation anim)
    {
        //Do your work here.
        viewN.setDrawable(myNewDrawable);
        return;
    }
    // ...
});
viewN.startAnimation(animN);