What i'm basically trying to do is make the objects that show up in the recycler view clickable to a certain TextView id because i'm making a program that shows an album cover and its title next to it in a list. I need to be able to click on each one of the boxes that the recycler view makes and have a TextView pop up with the other information (author, published date, hit songs, etc) when its clicked on and then a back button (if possible) to go back to the album list. I've been looking at this for hours and cant figure out how to make an OnclickListener work for it. If you know how or have any suggestions id be glad to hear them. Thank you!
package com.albumlist.albumlist;
import android.content.Context;
import android.content.Intent;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
private AlbumData[] itemsData;
public MyAdapter(AlbumData[] itemsData){
this.itemsData = itemsData;
}
public static class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
private TextView txtViewTitle;
private ImageView imgViewIcon;
public ViewHolder(View itemLayoutView) {
super(itemLayoutView);
itemLayoutView.setOnClickListener(this);
txtViewTitle = (TextView) itemLayoutView.findViewById(R.id.album_title);
imgViewIcon = (ImageView) itemLayoutView.findViewById(R.id.album_icon);
}
@Override
public void onClick(View v) {
}
}
@Override
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {
View itemLayoutView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.data_layout, null);
ViewHolder viewHolder = new ViewHolder(itemLayoutView);
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder viewHolder, int position) {
viewHolder.txtViewTitle.setText(itemsData[position].getTitle());
viewHolder.imgViewIcon.setImageResource(itemsData[position].getImageUrl());
}
@Override
public int getItemCount() {
return itemsData.length;
}
}
How does setOnClickListener do in android? In Android, the OnClickListener() interface has an onClick(View v) method that is called when the view (component) is clicked. The code for a component's functionality is written inside this method, and the listener is set using the setOnClickListener() method.
A nested RecyclerView is an implementation of a RecyclerView within a RecyclerView. An example of such a layout can be seen in a variety of apps such as the Play store where the outer (parent) RecyclerView is of Vertical orientation whereas the inner (child) RecyclerViews are of horizontal orientations.
The concept is well summed up by Xaver Kapeller in the comments. If you are looking for a simple way to manage your RecyclerView
interaction similar to the traditional interactions of a ListView
, check out BigNerdRanch's recyclerview-multiselect library on GitHub. They have a sample app that you can explore, which implements series of OnClickListeners
and OnLongClickListeners
with added capabilities of multi-selection.
Here's a snippet of how BigNerdRanch implements listeners in a Fragment
across an Adapter
and a ViewHolder
, which in this case is actually an extension of the library's own SwappingHolder.
public CrimeHolder(View itemView) {
super(itemView, mMultiSelector);
mTitleTextView = (TextView) itemView.findViewById(R.id.crime_list_item_titleTextView);
mDateTextView = (TextView) itemView.findViewById(R.id.crime_list_item_dateTextView);
mSolvedCheckBox = (CheckBox) itemView.findViewById(R.id.crime_list_item_solvedCheckBox);
itemView.setOnClickListener(this);
itemView.setLongClickable(true);
itemView.setOnLongClickListener(this);
}
public void bindCrime(Crime crime) {
mCrime = crime;
mTitleTextView.setText(crime.getTitle());
mDateTextView.setText(crime.getDate().toString());
mSolvedCheckBox.setChecked(crime.isSolved());
}
@Override
public void onClick(View v) {
if (mCrime == null) {
return;
}
if (!mMultiSelector.tapSelection(this)) {
selectCrime(mCrime);
}
}
@Override
public boolean onLongClick(View v) {
((AppCompatActivity) getActivity()).startSupportActionMode(mDeleteMode);
mMultiSelector.setSelected(this, true);
return true;
}
}
private class CrimeAdapter extends RecyclerView.Adapter<CrimeHolder> {
@Override
public CrimeHolder onCreateViewHolder(ViewGroup parent, int pos) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_item_crime, parent, false);
return new CrimeHolder(view);
}
@Override
public void onBindViewHolder(CrimeHolder holder, int pos) {
Crime crime = mCrimes.get(pos);
holder.bindCrime(crime);
Log.d(TAG, "binding crime" + crime + "at position" + pos);
}
@Override
public int getItemCount() {
return mCrimes.size();
}
}
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