Android ListView Example

In Android, ListView let you arranges components in a vertical scrollable list.

In this tutorial, we will show you 2 ListView examples :

1. Normal way to display components in ListView.
2. Custom array adapter to customize the item display in ListView.

P.S This project is developed in Eclipse 3.7, and tested with Android 2.3.3.

1. Normal ListView Example

In this example, we show you how to display a list of fruit name via ListView, it should be easy and self-explanatory.

1.1 Android Layout file

File : res/layout/list_fruit.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="10dp"
    android:textSize="20sp" >
</TextView>

1.2 ListView

package com.mkyong.android;
 
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
 
public class ListFruitActivity extends ListActivity {
 
 static final String[] FRUITS = new String[] { "Apple", "Avocado", "Banana",
   "Blueberry", "Coconut", "Durian", "Guava", "Kiwifruit",
   "Jackfruit", "Mango", "Olive", "Pear", "Sugar-apple" };
 
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
 
  // no more this
  // setContentView(R.layout.list_fruit);
 
  setListAdapter(new ArrayAdapter<String>(this, R.layout.list_fruit,FRUITS));
 
  ListView listView = getListView();
  listView.setTextFilterEnabled(true);
 
  listView.setOnItemClickListener(new OnItemClickListener() {
   public void onItemClick(AdapterView<?> parent, View view,
     int position, long id) {
       // When clicked, show a toast with the TextView text
       Toast.makeText(getApplicationContext(),
    ((TextView) view).getText(), Toast.LENGTH_SHORT).show();
   }
  });
 
 }
 
}

1.3 Demo

2. Custom ArrayAdapter Example

In this example, we show you how to create 4 items in the ListView, and use a custom “ArrayAdapter” to display different images base on the “item name” in the list.

2.1 Images
Get 4 images for demonstration.

2.2 Android Layout file
File : res/layout/list_mobile.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="5dp" >
 
    <ImageView
        android:id="@+id/logo"
        android:layout_width="50px"
        android:layout_height="50px"
        android:layout_marginLeft="5px"
        android:layout_marginRight="20px"
        android:layout_marginTop="5px"
        android:src="@drawable/windowsmobile_logo" >
    </ImageView>
 
    <TextView
        android:id="@+id/label"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@+id/label"
        android:textSize="30px" >
    </TextView>
 
</LinearLayout>

2.3 Custom ArrayAdapter
Create a class extends ArrayAdapter and customize the item display in the getView() method.

package com.mkyong.android.adaptor;
 
import com.mkyong.android.R;
 
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
 
public class MobileArrayAdapter extends ArrayAdapter<String> {
 private final Context context;
 private final String[] values;
 
 public MobileArrayAdapter(Context context, String[] values) {
  super(context, R.layout.list_mobile, values);
  this.context = context;
  this.values = values;
 }
 
 @Override
 public View getView(int position, View convertView, ViewGroup parent) {
  LayoutInflater inflater = (LayoutInflater) context
   .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 
  View rowView = inflater.inflate(R.layout.list_mobile, parent, false);
  TextView textView = (TextView) rowView.findViewById(R.id.label);
  ImageView imageView = (ImageView) rowView.findViewById(R.id.logo);
  textView.setText(values[position]);
 
  // Change icon based on name
  String s = values[position];
 
  System.out.println(s);
 
  if (s.equals("WindowsMobile")) {
   imageView.setImageResource(R.drawable.windowsmobile_logo);
  } else if (s.equals("iOS")) {
   imageView.setImageResource(R.drawable.ios_logo);
  } else if (s.equals("Blackberry")) {
   imageView.setImageResource(R.drawable.blackberry_logo);
  } else {
   imageView.setImageResource(R.drawable.android_logo);
  }
 
  return rowView;
 }
}

2.4 ListView
ListView, but use above custom adapter to display the list.

package com.mkyong.android;
 
import com.mkyong.android.adaptor.MobileArrayAdapter;
import android.app.ListActivity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.Toast;
import android.view.View;
 
public class ListMobileActivity extends ListActivity {
 
 static final String[] MOBILE_OS = 
               new String[] { "Android", "iOS", "WindowsMobile", "Blackberry"};
 
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
 
  setListAdapter(new MobileArrayAdapter(this, MOBILE_OS));
 
 }
 
 @Override
 protected void onListItemClick(ListView l, View v, int position, long id) {
 
  //get selected items
  String selectedValue = (String) getListAdapter().getItem(position);
  Toast.makeText(this, selectedValue, Toast.LENGTH_SHORT).show();
 
 }
 
}

2.5 Demo

Download Source Code

Download both examples – Android-ListView-Example.zip (21 KB)

References

1. Android ListView example
2. Android ListView JavaDoc

Thanks

akm

www.cdacians.com