我在适配器中的应用程序中使用Picasso，除了滚动时的图像加载性能，一切都很好。如果我滚动列表，在加载每个图像时，滚动将停止片刻，这是一个糟糕的表现。我在其他应用程序上看不到这个问题。
注意：我使用无尽的RecyclerView，图片路径是网址。
public class UltimateViewAdapterr extends UltimateViewAdapter<UltimateViewAdapterr.CellFeedViewHolder>
implements View.OnClickListener {
private static final DecelerateInterpolator DECCELERATE_INTERPOLATOR = new DecelerateInterpolator();
private static final AccelerateInterpolator ACCELERATE_INTERPOLATOR = new AccelerateInterpolator();
private static final OvershootInterpolator OVERSHOOT_INTERPOLATOR = new OvershootInterpolator(4);
private static final int ANIMATED_ITEMS_COUNT = 2;
private static final int VIEW_TYPE_EMPTY_LIST_PLACEHOLDER = 0;
private static final int VIEW_TYPE_OBJECT_VIEW = 1;
private Context context;
private int lastAnimatedPosition = -1;
private boolean animateItems = false;
private List<Post> mPosts;
private OnFeedItemClickListener onFeedItemClickListener;
private final Map<RecyclerView.ViewHolder, AnimatorSet> likeAnimations = new HashMap<>();
private final ArrayList<Integer> likedPositions = new ArrayList<>();
public UltimateViewAdapterr(Context context, List<Post> postList) {
this.context = context;
mPosts = postList;
}
@Override
public CellFeedViewHolder getViewHolder(View view) {
return null;
}
@Override
public CellFeedViewHolder onCreateViewHolder(ViewGroup viewGroup) {
View view = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.fragment_person_profile_timeline, viewGroup,
false);
CellFeedViewHolder cellFeedViewHolder = new CellFeedViewHolder(view);
cellFeedViewHolder.btnComments.setOnClickListener(this);
cellFeedViewHolder.btnMore.setOnClickListener(this);
cellFeedViewHolder.postPicture.setOnClickListener(this);
cellFeedViewHolder.likeImageButton.setOnClickListener(this);
cellFeedViewHolder.pictureImageView.setOnClickListener(this);
return cellFeedViewHolder;
}
private void runEnterAnimation(View view, int position) {
if (!animateItems || position >= ANIMATED_ITEMS_COUNT - 1) {
return;
}
if (position > lastAnimatedPosition) {
lastAnimatedPosition = position;
view.setTranslationY(Utils.getScreenHeight(context));
view.animate()
.translationY(0)
.setInterpolator(new DecelerateInterpolator(3.f))
.setDuration(700)
.start();
}
}
@Override
public void onBindViewHolder(CellFeedViewHolder viewHolder, int
position) {
runEnterAnimation(viewHolder.itemView, position);
bindFeedItem(position, viewHolder);
}
private void bindFeedItem(int position, CellFeedViewHolder holder) {
Post item = mPosts.get(position);
holder.nameTextView.setText(item.getSenderProfile().getName());
int likesCount = item.getLikes().size();
holder.likesTextView.setText(Integer.toString(likesCount));
holder.pictureImageView.setTag(item.getSenderProfile());
if (item.getSenderProfile().getImage() != null) {
Picasso.with(context).load(Constants.General.PROTOCOL + item.getImage().getImageAddress
()).into(holder.pictureImageView);
}
if (item.getImage() != null) {
int width = Utils.dpToPx(context.getResources().getConfiguration().screenWidthDp);
int height = Utils.dpToPx(context.getResources().getConfiguration().screenHeightDp);
Picasso.with(context).load(Constants.General.PROTOCOL + item.getImage()
.getImageAddress
()).priority(Picasso.Priority.HIGH).placeholder(R.drawable.ic_file_image_box).into
(holder.postPicture);
holder.postPictureContainer.setVisibility(View.VISIBLE);
}
/*else if (item.getVideo() != null) {
//TODO implement add video
}*/
if (!item.getText().isEmpty()) {
holder.postTextTextView.setText(item.getText());
holder.postTextTextView.setVisibility(View.VISIBLE);
}
if (item.getLikes() != null) {
holder.likesTextView.setText(Integer.toString(item.getLikes().size()));
}
holder.footerContainer.setTag(item);
holder.btnMore.setTag(item.getId().toString() + "," + position);
Hashtable<CellFeedViewHolder, Post> hashtagPost = new Hashtable<>();
hashtagPost.put(holder, item);
holder.postPicture.setTag(hashtagPost);
Hashtable<CellFeedViewHolder, String> hashtableTag = new Hashtable<>();
hashtableTag.put(holder, "false");
holder.likeImageButton.setTag(hashtableTag);
for (Profile profile : item.getLikes()) {
if (profile.getId() == Logged.Models.getUserProfile().getId()) {
holder.likeImageButton.setTag(hashtableTag.put(holder, "true"));
holder.likeImageButton.setImageResource(R.drawable.ic_heart);
break;
}
}
for (Profile profile : item.getLikes()) {
if (profile.getId() == Logged.Models.getUserProfile().getId()) {
holder.likeImageButton.setImageDrawable(context.getResources()
.getDrawable(R.drawable
.ic_heart));
holder.likeImageButton.setTag(hashtableTag.put(holder, "true"));
break;
}
}
holder.likesContainer.setTag(item);
holder.likesContainer.setOnClickListener(this);
if (likeAnimations.containsKey(holder)) {
likeAnimations.get(holder).cancel();
}
resetLikeAnimationState(holder);
}
@Override
public RecyclerView.ViewHolder onCreateHeaderViewHolder(ViewGroup viewGroup) {
return null;
}
@Override
public void onBindHeaderViewHolder(RecyclerView.ViewHolder viewHolder, int i) {
}
@Override
public int getItemCount() {
return mPosts.size();
}
@Override
public int getAdapterItemCount() {
return 0;
}
@Override
public long generateHeaderId(int i) {
return 0;
}
private void updateHeartButton(final CellFeedViewHolder holder, boolean animated) {
if (animated) {
if (!likeAnimations.containsKey(holder)) {
AnimatorSet animatorSet = new AnimatorSet();
likeAnimations.put(holder, animatorSet);
ObjectAnimator rotationAnim = ObjectAnimator.ofFloat(holder.likeImageButton, "rotation", 0f, 360f);
rotationAnim.setDuration(300);
rotationAnim.setInterpolator(ACCELERATE_INTERPOLATOR);
ObjectAnimator bounceAnimX = ObjectAnimator.ofFloat(holder.likeImageButton, "scaleX", 0.2f, 1f);
bounceAnimX.setDuration(300);
bounceAnimX.setInterpolator(OVERSHOOT_INTERPOLATOR);
ObjectAnimator bounceAnimY = ObjectAnimator.ofFloat(holder.likeImageButton, "scaleY", 0.2f, 1f);
bounceAnimY.setDuration(300);
bounceAnimY.setInterpolator(OVERSHOOT_INTERPOLATOR);
bounceAnimY.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(Animator animation) {
holder.likeImageButton.setImageResource(R.drawable.ic_heart);
}
});
animatorSet.play(rotationAnim);
animatorSet.play(bounceAnimX).with(bounceAnimY).after(rotationAnim);
animatorSet.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
resetLikeAnimationState(holder);
}
});
animatorSet.start();
}
} else {
if (likedPositions.contains(holder.getPosition())) {
holder.likeImageButton.setImageResource(R.drawable.ic_heart);
} else {
holder.likeImageButton.setImageResource(R.drawable.ic_heart_outline);
}
}
}
public void setOnFeedItemClickListener(OnFeedItemClickListener onFeedItemClickListener) {
this.onFeedItemClickListener = onFeedItemClickListener;
}
private void likePost(final CellFeedViewHolder holder, Post post) {
updateLikes(holder);
HttpClient.get(String.format(Constants.Server.GET_POST_LIKE, post.getId(),
Logged.Models
.getUserProfile().getId()), new
AsyncHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
}
@Override
public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
Toast.makeText(context, context.getString(R.string.toast_error_like),
Toast.LENGTH_SHORT)
.show();
updateUnlikes(holder);
}
});
}
private void updateLikes(final CellFeedViewHolder holder) {
int likesCount = Integer.parseInt(holder.likesTextView
.getText().toString()) + 1;
holder.likesTextView.setText(Integer.toString(likesCount));
updateHeartButton(holder, true);
Hashtable<CellFeedViewHolder, String> hashTags = new Hashtable<>();
hashTags.put(holder, "true");
holder.likeImageButton.setTag(hashTags);
}
private void updateUnlikes(final CellFeedViewHolder holder) {
int likesCount = Integer.parseInt(holder.likesTextView
.getText().toString()) - 1;
holder.likesTextView.setText(Integer.toString(likesCount));
holder.likeImageButton.setImageResource(R.drawable.ic_heart_outline);
Hashtable<CellFeedViewHolder, String> hashTags = new Hashtable<>();
hashTags.put(holder, "false");
holder.likeImageButton.setTag(hashTags);
}
private void unlikePost(final CellFeedViewHolder holder, Post post) {
updateUnlikes(holder);
HttpClient.get(String.format(Constants.Server.GET_POST_UNLIKE, post.getId()
, Logged.Models
.getUserProfile().getId()), new
AsyncHttpResponseHandler() {
@Override
public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
}
@Override
public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {
Toast.makeText(context, context.getString(R.string.toast_error_like),
Toast.LENGTH_SHORT)
.show();
updateLikes(holder);
}
});
}
@Override
public void onClick(final View view) {
switch (view.getId()) {
case R.id.image_button_comments:
LinearLayout footerContainer = (LinearLayout) view.getParent();
context.startActivity(new Intent(context, PersonProfilePostCommentsActivity
.class).putExtra("post", (Post) footerContainer.getTag()));
break;
case R.id.image_button_more:
if (onFeedItemClickListener != null) {
onFeedItemClickListener.onMoreClick(view, (String) view.getTag());
}
break;
case R.id.image_button_like:
Post post = (Post) ((LinearLayout) view.getParent()).getTag();
final Hashtable hashTags = (Hashtable<CellFeedViewHolder, String>) view
.getTag();
CellFeedViewHolder holder = (CellFeedViewHolder) hashTags.keys().nextElement();
String isLiked = (String) hashTags.values().iterator().next();
if (isLiked.equals("false")) {
likePost(holder, post);
} else {
unlikePost(holder, post);
}
break;
case R.id.image_view_post_picture:
final Hashtable postPictureTags = (Hashtable<CellFeedViewHolder, Post>) view
.getTag();
CellFeedViewHolder postPictureHolder = (CellFeedViewHolder) postPictureTags.keys()
.nextElement();
Post postPicturePost = (Post) postPictureTags.values().iterator().next();
Hashtable<CellFeedViewHolder, String> btnLikeTags = (Hashtable<CellFeedViewHolder, String>) postPictureHolder
.likeImageButton.getTag();
if (btnLikeTags.values().iterator().next().equals("false")) {
likePost(postPictureHolder, postPicturePost);
}
break;
case R.id.linear_layout_post_likes:
context.startActivity(new Intent(context, PostLikesActivity.class).putExtra
("post", (Post) view.getTag()));
break;
case R.id.image_view_picture:
context.startActivity(new Intent(context, PersonProfileActivity
.class).putExtra("profile", (Profile) view.getTag()));
break;
}
}
private void animatePhotoLike(final CellFeedViewHolder holder) {
if (!likeAnimations.containsKey(holder)) {
holder.vBgLike.setVisibility(View.VISIBLE);
holder.ivLike.setVisibility(View.VISIBLE);
holder.vBgLike.setScaleY(0.1f);
holder.vBgLike.setScaleX(0.1f);
holder.vBgLike.setAlpha(1f);
holder.ivLike.setScaleY(0.1f);
holder.ivLike.setScaleX(0.1f);
AnimatorSet animatorSet = new AnimatorSet();
likeAnimations.put(holder, animatorSet);
ObjectAnimator bgScaleYAnim = ObjectAnimator.ofFloat(holder.vBgLike, "scaleY", 0.1f, 1f);
bgScaleYAnim.setDuration(200);
bgScaleYAnim.setInterpolator(DECCELERATE_INTERPOLATOR);
ObjectAnimator bgScaleXAnim = ObjectAnimator.ofFloat(holder.vBgLike, "scaleX", 0.1f, 1f);
bgScaleXAnim.setDuration(200);
bgScaleXAnim.setInterpolator(DECCELERATE_INTERPOLATOR);
ObjectAnimator bgAlphaAnim = ObjectAnimator.ofFloat(holder.vBgLike, "alpha", 1f, 0f);
bgAlphaAnim.setDuration(200);
bgAlphaAnim.setStartDelay(150);
bgAlphaAnim.setInterpolator(DECCELERATE_INTERPOLATOR);
ObjectAnimator imgScaleUpYAnim = ObjectAnimator.ofFloat(holder.ivLike, "scaleY", 0.1f, 1f);
imgScaleUpYAnim.setDuration(300);
imgScaleUpYAnim.setInterpolator(DECCELERATE_INTERPOLATOR);
ObjectAnimator imgScaleUpXAnim = ObjectAnimator.ofFloat(holder.ivLike, "scaleX", 0.1f, 1f);
imgScaleUpXAnim.setDuration(300);
imgScaleUpXAnim.setInterpolator(DECCELERATE_INTERPOLATOR);
ObjectAnimator imgScaleDownYAnim = ObjectAnimator.ofFloat(holder.ivLike, "scaleY", 1f, 0f);
imgScaleDownYAnim.setDuration(300);
imgScaleDownYAnim.setInterpolator(ACCELERATE_INTERPOLATOR);
ObjectAnimator imgScaleDownXAnim = ObjectAnimator.ofFloat(holder.ivLike, "scaleX", 1f, 0f);
imgScaleDownXAnim.setDuration(300);
imgScaleDownXAnim.setInterpolator(ACCELERATE_INTERPOLATOR);
animatorSet.playTogether(bgScaleYAnim, bgScaleXAnim, bgAlphaAnim, imgScaleUpYAnim, imgScaleUpXAnim);
animatorSet.play(imgScaleDownYAnim).with(imgScaleDownXAnim).after(imgScaleUpYAnim);
animatorSet.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
resetLikeAnimationState(holder);
}
});
animatorSet.start();
}
}
private void resetLikeAnimationState(CellFeedViewHolder holder) {
likeAnimations.remove(holder);
holder.vBgLike.setVisibility(View.GONE);
holder.ivLike.setVisibility(View.GONE);
}
public interface OnFeedItemClickListener {
public void onCommentsClick(View v, int position);
public void onMoreClick(View view, String tag);
public void onProfileClick(View v);
}
public static class CellFeedViewHolder extends RecyclerView.ViewHolder {
@Bind(R.id.image_view_post_picture)
ImageView postPicture;
@Bind(R.id.image_button_comments)
ImageButton btnComments;
@Bind(R.id.image_button_like)
ImageButton likeImageButton;
@Bind(R.id.image_button_more)
ImageButton btnMore;
@Bind(R.id.vBgLike)
View vBgLike;
@Bind(R.id.ivLike)
ImageView ivLike;
@Bind(R.id.text_view_name)
TextView nameTextView;
@Bind(R.id.image_view_picture)
ImageView pictureImageView;
@Bind(R.id.text_view_likes)
TextView likesTextView;
@Bind(R.id.linear_layout_footer_container)
LinearLayout footerContainer;
@Bind(R.id.vImageRoot)
SquaredFrameLayout postPictureContainer;
@Bind(R.id.text_view_text)
TextView postTextTextView;
@Bind(R.id.linear_layout_post_likes)
LinearLayout likesContainer;
public CellFeedViewHolder(View view) {
super(view);
ButterKnife.bind(this, view);
}
}
}
答案 0 :(得分：1)
当scrollview或listview滚动视图清除其子项并设置新值时。在你的情况下，毕加索在将图像设置为imageview之后获取图像。 1- Volley处理这个问题。如果你可以将毕加索切换到齐射，那就去做吧。 2-您可以在第一次缓存图像，之后滚动检查缓存然后设置图像。但它增加了应用内存。您必须清除已缓存的图像