I have recycler view and i parse data from jsonArray and display it as lists.now i want to highlight the row when I long click on a position i have already coded for long click.How to highlight the selected row.please help me with this.
recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(), recyclerView, new ClickListener() {
@Override
public void onClick(View view, int position) {
}
@Override
public void onLongClick(View view, int position) {
Toast.makeText(MainActivity.this, "long clicked", Toast.LENGTH_SHORT).show();
}
}));
I would try to add the longClick listener
when you do the onBindViewHolder
in your adapter .
@Override
public void onBindViewHolder(E holder, int position) {
holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
// Do your stuff
return false;
}
});
}
@Override public void onBindViewHolder(MyViewHolder holder, final int position) { holder.itemView.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { return false; //todo to highlight the row } }); }
Define a class
public class RecyclerViewItemClickListener implements RecyclerView.OnItemTouchListener {
//GestureDetector to detect touch event.
private GestureDetector gestureDetector;
private QueriesListFragment.ClickListener clickListener;
public RecyclerViewItemClickListener(Context context, final RecyclerView recyclerView, final QueriesListFragment.ClickListener clickListener) {
this.clickListener = clickListener;
gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onSingleTapUp(MotionEvent e) {
return true;
}
@Override
public void onLongPress(MotionEvent e) {
//Find child on x and y position relative to screen
View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null) {
clickListener.onLongClick(child, recyclerView.getChildLayoutPosition(child));
}
}
});
}
@Override
public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
//On Touch event
View child = rv.findChildViewUnder(e.getX(), e.getY());
if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
clickListener.onClick(child, rv.getChildLayoutPosition(child));
}
return false;
}
@Override
public void onTouchEvent(RecyclerView rv, MotionEvent e) {
}
@Override
public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
}
}
Define a interface
public interface ClickListener {
void onClick(View view, int position);
void onLongClick(View view, int position);
}
Assign this to recycler view
myRecyclerView.addOnItemTouchListener(new RecyclerViewItemClickListener(getActivity(), mQueriesListRecyclerView, new ClickListener() {
@Override
public void onClick(View view, int position) {
//triggers when click
}
@Override
public void onLongClick(View view, int position) {
//triggers when you long press
}
}));
In your case if you have the longClicked item position as int
and item it self as view
you can do that:
recyclerView.addOnItemTouchListener(new
RecyclerTouchListener(getApplicationContext(), recyclerView, new ClickListener() {
@Override
public void onClick(View view, int position) {
}
@Override
public void onLongClick(View view, int position) {
view.setTag("Selected");
recyclerView.getAdapter().notifyItemChanged(position);
return true;
}
}));
Then in your RecyclerView.Adapter
shuld do this:
@Override
public void onBindViewHolder(YourViewHolderClass holder, int position) {
if(holder.getTag().equals("Selected"){
//do highlight
//for example whit [RecyclerView.ItemDecoration][1]
}else{
//remove highlight
//else is mandatory in order to prevent bugs when view is recycled
}
});
}
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