Android: CustomList View Adapter with Item click Listener

This is just a litle modification i made on the previous code to add a click listener on the list items

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </ListView>
 
</LinearLayout>

On this main activity implement the interface OnItemClickListener on the class declaration line as shown below in blue. The add the statement  list.setOnItemClickListener(this); on the onCreate  method as it is in blue just below.

MainActivity.java

import java.util.ArrayList;
import java.util.List;





import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnItemClickListener{
    ListView list;
  
    String[]titles={"Directions","Places","Restaurants","Current Location"};
    public static final String[] descriptions = new String[] { "Get directions of places",
        "Find places","Find Restaurants","Your current" };

public static final Integer[] images = { R.drawable.read,
        R.drawable.download ,R.drawable.download ,R.drawable.download };

ListView listView;
List<RowItem> rowItems;

   

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
                  rowItems = new ArrayList<RowItem>();
        for (int i = 0; i < titles.length; i++) {
            RowItem item = new RowItem(images[i], titles[i], descriptions[i]);
            rowItems.add(item);
        }

        listView = (ListView) findViewById(R.id.listView1);
        CustomList adapter = new CustomList(this,
                R.layout.row, rowItems);
        listView.setAdapter(adapter);
        listView.setOnItemClickListener(this);
       
   
    listView = (ListView) findViewById(R.id.listView1);
    CustomList adapter = new CustomList(this,
            R.layout.row, rowItems);
    listView.setAdapter(adapter);
    listView.setOnItemClickListener(this);
   
}
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }


//Abstract method that's added  on implementing the OnItemClickListener interface
@Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int pos, long arg3) {
        String selected=rowItems.get(pos).getTitle().toLowerCase();
      
      
    if(pos==0){
            Toast.makeText(getApplicationContext(), selected, Toast.LENGTH_LONG).show();
      
        }
   if(pos==1){
    Toast.makeText(getApplicationContext(), "selected", Toast.LENGTH_LONG).show();      
       
}
if(pos==2){
    Toast.makeText(getApplicationContext(), "selected", Toast.LENGTH_LONG).show();      
       
}
if(pos==3){
    Toast.makeText(getApplicationContext(), "selected", Toast.LENGTH_LONG).show();      
       
} 
     }
   
   
}

Create a java class called Custom list

CustomList.java

import java.util.List;



import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;


public class CustomList extends ArrayAdapter<RowItem> {

    Context context;

    public CustomList(Context context, int resourceId,
            List<RowItem> items) {
        super(context, resourceId, items);
        this.context = context;
    }

    /* private view holder class */
    private class ViewHolder {
        ImageView imageView;
        TextView txtTitle;
        TextView txtDesc;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        RowItem rowItem = getItem(position);

        LayoutInflater mInflater = (LayoutInflater) context
                .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.row, null);
            holder = new ViewHolder();
            holder.txtDesc = (TextView) convertView.findViewById(R.id.desc);
            holder.txtTitle = (TextView) convertView.findViewById(R.id.title);
            holder.imageView = (ImageView) convertView.findViewById(R.id.icon);
            convertView.setTag(holder);
        } else
            holder = (ViewHolder) convertView.getTag();

        holder.txtDesc.setText(rowItem.getDesc());
        holder.txtTitle.setText(rowItem.getTitle());
        holder.imageView.setImageResource(rowItem.getImageId());

        return convertView;
    }
}
Create another java class called RowItem which holds the list items ,description and the images

RowItem.java

public class RowItem {
    private int imageId;
    private String title;
    private String desc;

    public RowItem(int imageId, String title, String desc) {
        this.imageId = imageId;
        this.title = title;
        this.desc = desc;
    }
    public int getImageId() {
        return imageId;
    }
    public void setImageId(int imageId) {
        this.imageId = imageId;
    }
    public String getDesc() {
        return desc;
    }
    public void setDesc(String desc) {
        this.desc = desc;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    @Override
    public String toString() {
        return title + "\n" + desc;
    }
}


row.xml contains textviews and image view which holds the texts of the list and the images respectively

 row.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
    <ImageView
        android:id="@+id/icon"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:contentDescription="image"
        android:paddingLeft="10dp"
        android:paddingRight="10dp" />

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@+id/icon"
        android:paddingBottom="10dp"
        android:textColor="#CC0033"
        android:textSize="16dp" />

    <TextView
        android:id="@+id/desc"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/title"
        android:layout_toRightOf="@+id/icon"
        android:paddingLeft="10dp"
        android:textColor="#3399FF"
        android:textSize="14dp" />
</RelativeLayout>

Output of the code will be as below



NB: Make sure that you have the images called read and download in your drawables folder. You can even use your own customized images