expanding recyclerview item
10,972
I ran into the same issue. This happens because of the ViewHolderPattern.
Android will recycle the view, regardlessly if it's expanded or not. So tell android that if your view is expanded, it is not recyclable.
In Your ViewHolder Class add:
public MyViewHolder(View itemView) {
super(itemView);
frame = (FrameLayout) itemView.findViewById(R.id.base);
frame.setTag(this); // to get a reference to viewholder later on
}
In Your OnClick Method add:
@Override
public void onClick(final View v) {
MyViewHolder holder = (MyViewHolder) v.getTag();
holder.setIsRecyclable(false);
if (mOriginalHeight == 0) {
mOriginalHeight = v.getHeight();
}
ValueAnimator valueAnimator;
...
}
This should solve Your Problem. Remember to set "setIsRecyclable()" to true again after the view isn't expanded any more so that android can recycle it. Hope I could help.
Cheers
Florestan
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Author by
mohab elmahdy
Updated on June 14, 2022Comments
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mohab elmahdy about 2 years
if i expand any item in the recyclerview it expands fine but when i scroll down the recylerview i found other items also expanded , due to recycling it took the expanded size not the original one
public class FeedAdapter extends RecyclerView.Adapter<FeedAdapter.MyViewHolder> implements View.OnClickListener { private LayoutInflater inflater; private Context mcontext; private int mOriginalHeight = 0; private boolean mIsViewExpanded = false; public FeedAdapter(Context context) { inflater = LayoutInflater.from(context); mcontext = context; } @Override public MyViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) { View view = inflater.inflate(R.layout.custom_row, viewGroup, false); MyViewHolder holder = new MyViewHolder(view); holder.frame.setOnClickListener(this); return holder; } @Override public void onBindViewHolder(MyViewHolder myViewHolder, int i) { } @Override public int getItemCount() { return 100; } @Override public void onClick(final View v) { if (mOriginalHeight == 0) { mOriginalHeight = v.getHeight(); } ValueAnimator valueAnimator; if (v.getHeight() < (mOriginalHeight + (int) (mOriginalHeight * 1.5))) { valueAnimator = ValueAnimator.ofInt(mOriginalHeight, mOriginalHeight + (int) (mOriginalHeight * 1.5)); } else { valueAnimator = ValueAnimator.ofInt(mOriginalHeight + (int) (mOriginalHeight * 1.5), mOriginalHeight); } valueAnimator.setDuration(300); valueAnimator.setInterpolator(new LinearInterpolator()); valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { public void onAnimationUpdate(ValueAnimator animation) { Integer value = (Integer) animation.getAnimatedValue(); v.getLayoutParams().height = value.intValue(); v.requestLayout(); } }); valueAnimator.start(); } class MyViewHolder extends RecyclerView.ViewHolder { FrameLayout frame; public MyViewHolder(View itemView) { super(itemView); frame = (FrameLayout) itemView.findViewById(R.id.base); } } }
so how do i fix that and also is there a better way to expand and collapse items ?