我希望能在
但问题在于,如果我在ImageView1上应用动画,然后在ImageView1的动画结束之前对ImageView2应用动画,则ImageView1的动画会被打断,并且ImageView1会直接设置为最终状态。
请注意,我使用2个线程的
GridView
中使用动画展示ImageViews
,我已经成功地展示并正确应用了动画。但问题在于,如果我在ImageView1上应用动画,然后在ImageView1的动画结束之前对ImageView2应用动画,则ImageView1的动画会被打断,并且ImageView1会直接设置为最终状态。
请注意,我使用2个线程的
ThreadPoolExecutor
下载图像。每当一张图片完成下载时,我都会调用下面ImageAdapter
的addImage(image)
方法,这会将图像添加到GridView
中并刷新GridView
以显示最新的图像集。在这里,在渲染时,新图像会显示动画,而这个动画(我猜)会打断当前正在进行的图像的动画。
ImageAdapter:
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);
}
}
}
GridView
而不是GridLayout
。GridLayoutAnimationController
是为GridLayout
设计的。 - Geek