mentech: ListView in Android (Basic)

ListView: ListView is a view group that displays a list of scrollable items. The list items are automatically inserted to the list using an Adapter that pulls content from a source such as an array and converts each item result into a view that's placed into the list.

This tutorial describes how to use ListView and ListActivity in Android.

okay! so let's try this small app

-------------------------------------------
App Name: ListViewBasic
Package Name: com.rdc
Android SDK: Android SDK 2.3.3 / API 10
Default ListActivity Name: ActivityListView
-------------------------------------------

ActivityListView.java

package com.rdc;

import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class ActivityListView extends ListActivity {

 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);

 // Create an array of Strings, that will be put to our ListActivity
 String[] namesArray = new String[] { "Linux", "Windows7", "Eclipse",
    "Suse", "Ubuntu", "Solaris", "Android", "iPhone" };
 
 /* Create an ArrayAdapter, that will actually make the Strings above
  appear in the ListView */
 this.setListAdapter(new ArrayAdapter<String>(this,
   android.R.layout.simple_list_item_1, namesArray));
 }

  @Override
  protected void onListItemClick(ListView l, View v, 
  int position, long id) {
 super.onListItemClick(l, v, position, id);
 
 // Get the item that was clicked
 Object o = this.getListAdapter().getItem(position);
 String keyword = o.toString();
 Toast.makeText(this, "You selected: " + keyword, 
   Toast.LENGTH_SHORT).show();
 }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent">
 <TextView
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="@string/hello" />
</LinearLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest
 xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.rdc"
 android:versionCode="1"
 android:versionName="1.0">
 <uses-sdk android:minSdkVersion="10" />

 <application
  android:icon="@drawable/icon"
  android:label="@string/app_name">
  <activity
   android:name=".ActivityListView"
   android:label="@string/app_name">
   <intent-filter>
   <action android:name="android.intent.action.MAIN" />
   <category android:name="android.intent.category.LAUNCHER" />
   </intent-filter>
  </activity>

 </application>
</manifest>