Android RecyclerView洗牌项目
我知道这个问题已经被问了好几次,但问题仍然存在。所以问题是,当我滚动我的垂直Android RecyclerView洗牌项目,android,android-recyclerview,android-viewholder,sectionedrecyclerviewadapter,Android,Android Recyclerview,Android Viewholder,Sectionedrecyclerviewadapter,我知道这个问题已经被问了好几次,但问题仍然存在。所以问题是,当我滚动我的垂直RecyclerView列表时,ViewHolder中的项目会被洗牌。我有一些对象的列表,其中布尔值决定了视图类型,因此我可以放大各种视图。下面是代码: @NonNull @Override public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { if(viewType == TYP
RecyclerView
列表时,ViewHolder
中的项目会被洗牌。我有一些对象的列表,其中布尔值决定了视图类型
,因此我可以放大各种视图。下面是代码:
@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
if(viewType == TYPE_ACTIVE) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_poll_item_active, parent, false);
return new CardViewHolderActive(view);
} else if(viewType == TYPE_INACTIVE) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_poll_item_past, parent, false);
return new CardViewHolderPast(view);
}
throw new RuntimeException("There is no type that matches the type " + viewType + " + make sure your using types correctly");
}
@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
Poll poll = mListPollObjects.get(position);
Log.d("ADAPTER", "position - " + position);
if(holder instanceof CardViewHolderActive) {
((CardViewHolderActive) holder).bindActivePolls(poll);
} else if(holder instanceof CardViewHolderPast) {
if(position == 0) {
((CardViewHolderPast) holder).bindPastPolls(poll, true);
} else if(getItemViewType(position - 1) == TYPE_INACTIVE) {
((CardViewHolderPast) holder).bindPastPolls(poll, false);
} else if(getItemViewType(position - 1) == TYPE_ACTIVE)
((CardViewHolderPast) holder).bindPastPolls(poll, true);
}
}
@Override
public int getItemCount() {
return mListPollObjects.size();
}
/**
* Added to solve the RecyclerView shuffling problem.
*
* @param position
* @return
*/
@Override
public long getItemId(int position) {
return position;
}
/**
* Added to solve the RecyclerView shuffling problem.
*
* @param position
* @return
*/
@Override
public int getItemViewType(int position) {
Poll poll = mListPollObjects.get(position);
if(poll.getStatus().equals(Poll.STATUS_ACTIVE)) {
return TYPE_ACTIVE;
} else {
return TYPE_INACTIVE;
}
}
所以当我有:
@Override
public int getItemViewType(int position) {
return position;
}
洗牌已经消失,但是我必须手动在onBindViewHolder
中进行绑定,所以我决定切换到viewTypes
。我真的搞不懂这里到底发生了什么,这很烦人。。。希望我提供了足够的信息。提前谢谢
以下是来自CardViewHolderActive
的bindActivePolls
方法:
public void bindActivePolls(final Poll polls) {
int listImageSize = polls.getListImageObjects().size();
//tvPollTitle.setText(polls.getStatus() + " - " + polls.getId());
if(polls.getTitle() != null || !polls.getTitle().equals("")) {
tvPollTitle.setText(polls.getTitle());
} else {
tvPollTitle.setText("");
}
tvCurrentVotes.setText(String.valueOf(polls.getVotesCount()) + "/");
tvUpToVotes.setText(String.valueOf(polls.getMaxVotes()));
// Setting the percentage bars.
pbProgressOne.setProgress(votePercentageCalculator(polls.getVotesCount(), polls.getListImageObjects().get(0).getVotes()));
tvProgressOne.setText(String.valueOf(pbProgressOne.getProgress()) + mContext.getString(R.string.percentage));
pbProgressTwo.setProgress(votePercentageCalculator(polls.getVotesCount(), polls.getListImageObjects().get(1).getVotes()));
tvProgressTwo.setText(String.valueOf(pbProgressTwo.getProgress()) + mContext.getString(R.string.percentage));
GlideApp.with(mContext)
.asDrawable()
.load(polls.getListImageObjects().get(0).getUrlImageMainThumbnail())
.transforms(new CenterCrop(), new RoundedCorners(20))
.into(ivImageOne);
GlideApp.with(mContext)
.asDrawable()
.load(polls.getListImageObjects().get(1).getUrlImageMainThumbnail())
.transforms(new CenterCrop(), new RoundedCorners(20))
.into(ivImageTwo);
if(listImageSize >= 3) {
pbProgressThree.setProgress(votePercentageCalculator(polls.getVotesCount(), polls.getListImageObjects().get(2).getVotes()));
tvProgressThree.setText(String.valueOf(pbProgressThree.getProgress()) + mContext.getString(R.string.percentage));
GlideApp.with(mContext)
.asDrawable()
.load(polls.getListImageObjects().get(2).getUrlImageMainThumbnail())
.transforms(new CenterCrop(), new RoundedCorners(20))
.into(ivImageThree);
}
if(listImageSize >= 4) {
pbProgressFour.setProgress(votePercentageCalculator(polls.getVotesCount(), polls.getListImageObjects().get(3).getVotes()));
tvProgressFour.setText(String.valueOf(pbProgressFour.getProgress()) + mContext.getString(R.string.percentage));
GlideApp.with(mContext)
.asDrawable()
.load(polls.getListImageObjects().get(3).getUrlImageMainThumbnail())
.transforms(new CenterCrop(), new RoundedCorners(20))
.into(ivImageFour);
}
}
和bindPastPolls()
来自cardwiewholderpast
:
public void bindPastPolls(Poll polls, boolean isFirstPast) {
if(isFirstPast) {
vSeparator.setVisibility(View.VISIBLE);
tvPastContestSeparator.setVisibility(View.VISIBLE);
}
int listImageSize = polls.getListImageObjects().size();
//tvPollTitle.setText(polls.getStatus() + " - " + polls.getId());
if(polls.getTitle() != null || !polls.getTitle().equals("")) {
tvPollTitle.setText(polls.getTitle());
} else {
tvPollTitle.setText("");
}
tvCurrentVotes.setText(String.valueOf(polls.getVotesCount()) + "/");
tvUpToVotes.setText(String.valueOf(polls.getMaxVotes()));
pbProgressOne.setProgress(votePercentageCalculator(polls.getVotesCount(), polls.getListImageObjects().get(0).getVotes()));
tvProgressOne.setText(String.valueOf(pbProgressOne.getProgress()) + mContext.getString(R.string.percentage));
pbProgressTwo.setProgress(votePercentageCalculator(polls.getVotesCount(), polls.getListImageObjects().get(1).getVotes()));
tvProgressTwo.setText(String.valueOf(pbProgressTwo.getProgress()) + mContext.getString(R.string.percentage));
GlideApp.with(mContext)
.asDrawable()
.load(polls.getListImageObjects().get(0).getUrlImageMainThumbnail())
.transforms(new CenterCrop(), new RoundedCorners(20))
.into(ivImageOne);
GlideApp.with(mContext)
.asDrawable()
.load(polls.getListImageObjects().get(1).getUrlImageMainThumbnail())
.transforms(new CenterCrop(), new RoundedCorners(20))
.into(ivImageTwo);
if(listImageSize >= 3) {
pbProgressThree.setProgress(votePercentageCalculator(polls.getVotesCount(), polls.getListImageObjects().get(2).getVotes()));
tvProgressThree.setText(String.valueOf(pbProgressThree.getProgress()) + mContext.getString(R.string.percentage));
GlideApp.with(mContext)
.asDrawable()
.load(polls.getListImageObjects().get(2).getUrlImageMainThumbnail())
.transforms(new CenterCrop(), new RoundedCorners(20))
.into(ivImageThree);
}
if(listImageSize >= 4) {
pbProgressFour.setProgress(votePercentageCalculator(polls.getVotesCount(), polls.getListImageObjects().get(3).getVotes()));
tvProgressFour.setText(String.valueOf(pbProgressFour.getProgress()) + mContext.getString(R.string.percentage));
GlideApp.with(mContext)
.asDrawable()
.load(polls.getListImageObjects().get(3).getUrlImageMainThumbnail())
.transforms(new CenterCrop(), new RoundedCorners(20))
.into(ivImageFour);
}
}
更新:当我设置holder.setIsRecyclable(false)时,它工作正常,但我猜它正在失去RecycleView的主要用途?几年前我也遇到了这个问题,因为如果API中有图像,我就使用glide,如果没有,我就没有设置图像。我添加了else语句来指示图像视图的src。如果希望为空,请设置一个与背景匹配的src。如果仔细阅读,可能重复的src不会重复,但看起来类似。发布
bindActivePolls(poll)
和bindPastPolls(poll,true)的代码代码>bindVIewHolder看起来很奇怪。。。为什么要检查上一个项目的viewtype?您应该只依赖那里的holder.getItemViewType()
。问题已更新。