我想使用动画显示ImageViews。GridView我可以显示它们并正确应用动画。
但问题是，如果我在 ImageView1 上应用动画，然后在 ImageView2 上应用动画（在 ImageView1 上的动画结束之前），那么 ImageView1 上的动画会被中断，并且 ImageView1 直接设置为最终状态。
请注意，我使用ThreadPoolExecutor2 个线程下载图像。每当图像下载完成时，我都会调用addImage(image)下面的方法，ImageAdapter然后依次添加图像GridView并GridView刷新以显示最新的图像集。在这里，在渲染时，新图像会显示动画，这个动画（我猜）会中断当前动画图像的动画。
图像适配器：
public class ImageAdapter extends BaseAdapter {
private Context mContext;
private List<Bitmap> images;
private ArrayList<Integer> colors;
private boolean[] alreadyLoadedIndexes;
Animation animation;
AnimatorSet animator;
public void addImage(Bitmap img) {
images.add(img);
notifyDataSetChanged();
}
public void setAnimation(Animation animation) {
this.animator = null;
this.animation = animation;
}
public void setAnimator(AnimatorSet animation) {
this.animation = null;
this.animator = animation;
}
public void resetImages() {
images.clear();
notifyDataSetChanged();
alreadyLoadedIndexes = null;
alreadyLoadedIndexes = new boolean[20];
}
// Constructor
public ImageAdapter(Context c) {
mContext = c;
images = new ArrayList<Bitmap>();
colors = new ArrayList<Integer>();
colors.add(Color.CYAN);
colors.add(Color.BLUE);
colors.add(Color.GRAY);
colors.add(Color.YELLOW);
colors.add(Color.MAGENTA);
alreadyLoadedIndexes = new boolean[20];
}
@Override
public int getCount() {
return 20;
}
@Override
public Object getItem(int position) {
return 20;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = new ImageView(mContext);
imageView
.setBackgroundColor(colors.get((int) ((Math.sqrt(position) + 2 * position) % 5)));
// If image at index 'position' is available
if (images.size() > position) {
// If loading this image first time then only apply animation
if (!alreadyLoadedIndexes[position]) {
// If animation is specified
if (this.animation != null) {
imageView.setImageBitmap(images.get(position));
imageView.startAnimation(animation);
}
// If animator set is specified
else if (this.animator != null) {
imageView.setImageBitmap(null);
imageView.setBackgroundColor(colors.get((int) ((Math
.sqrt(position) + 2 * position) % 5)));
animator.setTarget(imageView);
animator.start();
Log.e("", "setting image after " + animator.getDuration()
/ 2);
new Handler().postDelayed(
new runnable(imageView, images.get(position)), 500);
} else {
// Use default animation if nothing is specified.
imageView.setImageBitmap(images.get(position));
animation = AnimationUtils.loadAnimation(mContext,
R.anim.fade_in);
imageView.startAnimation(animation);
}
} else {
imageView.setImageBitmap(images.get(position));
}
alreadyLoadedIndexes[position] = true;
}
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new GridView.LayoutParams(150, 150));
return imageView;
}
class runnable implements Runnable {
ImageView image;
Bitmap bitmap;
public runnable(ImageView img, Bitmap bitmap) {
this.image = img;
this.bitmap = bitmap;
}
@Override
public void run() {
Log.e("", "setting image.");
image.setImageBitmap(bitmap);
}
}
}