Let's see how to set OnItemClickListener in RecyclerView.
Adding OnItemClickListiner to Recycler View.
By default, RecyclerView doesn't have onItemClickListiner similar to ListView.
1. Implement onItemClickListener in ViewHolder.
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
@Override
public void onClick(View v) {
}
}2. Create an Interface OnItemClickListener
3. Create an empty method
public void onItemClick(View view , int position);public interface OnItemClickListener {
public void onItemClick(View view , int position);
}4. Pass view and position from onClick
@Override
public void onClick(View v) {
mItemClickListener.onItemClick(v, getPosition()); //OnItemClickListener mItemClickListener;
}
5. SetOnItemClickListiner from adapter.
adapter.SetOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(View v , int position) {
// TODO Auto-generated method stub
}
});Complete Code
ListAdapterHolder
/*
* Copyright (C) 2014 VenomVendor <info@VenomVendor.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package vee.android.sample.recycler.view;
import android.support.v4.app.FragmentActivity;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
public class ListAdapterHolder extends RecyclerView.Adapter<ListAdapterHolder.ViewHolder> {
private final FragmentActivity mActivity;
private List<UserDetails> mUserDetails = new ArrayList<UserDetails>();
OnItemClickListener mItemClickListener;
public ListAdapterHolder(FragmentActivity mActivity) {
this.mActivity = mActivity;
createUserDetails();
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent , int viewType) {
final LayoutInflater mInflater = LayoutInflater.from(parent.getContext());
final View sView = mInflater.inflate(R.layout.single_list_item, parent, false);
return new ViewHolder(sView);
}
@Override
public void onBindViewHolder(ViewHolder holder , int position) {
holder.vId.setText("ID: " + mUserDetails.get(position).getId());
holder.vName.setText("Name: " + mUserDetails.get(position).getName());
holder.vSex.setText("Sex: " + mUserDetails.get(position).getSex());
holder.vAge.setText("Age: " + mUserDetails.get(position).getAge());
}
@Override
public int getItemCount() {
return mUserDetails.size();
}
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView vName, vSex, vId, vAge;
public ViewHolder(View view) {
super(view);
vId = (TextView) view.findViewById(R.id.list_id);
vName = (TextView) view.findViewById(R.id.list_name);
vSex = (TextView) view.findViewById(R.id.list_sex);
vAge = (TextView) view.findViewById(R.id.list_age);
view.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (mItemClickListener != null) {
mItemClickListener.onItemClick(v, getPosition());
}
}
}
public interface OnItemClickListener {
public void onItemClick(View view , int position);
}
public void SetOnItemClickListener(final OnItemClickListener mItemClickListener) {
this.mItemClickListener = mItemClickListener;
}
/* ==========This Part is not necessary========= */
/**
* Create Random Users
*/
private void createUserDetails() {
for (int i = 0; i < 100; i++) {
UserDetails mDetails = new UserDetails();
mDetails.setId(i);
mDetails.setName("Name " + i);
mDetails.setSex((i % 2) == 0 ? "M" : "F");
mDetails.setAge(randInt(14, 50));
mUserDetails.add(mDetails);
}
}
/*
* Snippet from http://stackoverflow.com/a/363692/1008278
*/
public static int randInt(int min , int max) {
Random rand = new Random();
return rand.nextInt((max - min) + 1) + min;
}
/* ==========This Part is not necessary========= */
}
PlaceHolderFragment
/*
* Copyright (C) 2014 VenomVendor <info@VenomVendor.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package vee.android.sample.recycler.view;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import vee.android.sample.recycler.view.ListAdapterHolder.OnItemClickListener;
/**
* A placeholder fragment containing a simple view.
*/
public class PlaceholderFragment extends Fragment {
FragmentActivity mActivity;
RecyclerView mRecyclerView;
ListAdapterHolder adapter;
public PlaceholderFragment() {
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
this.mActivity = (FragmentActivity) activity;
setRetainInstance(true);
}
@Override
public View onCreateView(LayoutInflater inflater , ViewGroup container , Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
mRecyclerView = (RecyclerView) rootView.findViewById(R.id.recycler_view);
adapter = new ListAdapterHolder(mActivity);
return rootView;
}
@Override
public void onViewCreated(View view , Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
mRecyclerView.setAdapter(adapter);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
adapter.SetOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(View v , int position) {
// do something with position
}
});
}
}
MainActivity
/*
* Copyright (C) 2014 VenomVendor <info@VenomVendor.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package vee.android.sample.recycler.view;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
final Fragment mFragment = new PlaceholderFragment();
getSupportFragmentManager().beginTransaction().add(R.id.container, mFragment).commit();
}
}
}
UserDetails
/*
* Copyright (C) 2014 VenomVendor <info@VenomVendor.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package vee.android.sample.recycler.view;
public class UserDetails {
private int id;
private String name;
private String sex;
private int age;
public int getId() {
return id;
}
public String getName() {
return name;
}
public String getSex() {
return sex;
}
public void setId(int id) {
this.id = id;
}
public void setName(String name) {
this.name = name;
}
public void setSex(String sex) {
this.sex = sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}