Android - ListView

1. First of all, you got some data to display. In android, you would better store your data in XML files.

here is our /res/values/strings.xml

<?xml version="1.0" encoding="utf-8"?><resources> <string name="hello">Hello World, MyListView!</string> <string name="app_name">ListView</string> <string-array name="str_provinces"> <item>北京</item> <item>天津</item> <item>上海</item> <item>重庆</item> <item>宁夏</item> <item>西藏</item> <item>广西</item> <item>新疆</item> <item>内蒙古</item> <item>香港</item> <item>澳门</item> <item>黑龙江</item> <item>云南</item> <item>吉林</item> <item>安徽</item> <item>山东</item> <item>山西</item> <item>广东</item> <item>广西</item> <item>江苏</item> <item>江西</item> <item>河北</item> <item>河南</item> <item>浙江</item> <item>海南</item> <item>湖北</item> <item>湖南</item> <item>甘肃</item> <item>福建</item> <item>四川</item> <item>贵州</item> <item>辽宁</item> <item>陕西</item> <item>青海[</item> <item>台湾</item></string-array> </resources>

 

2. Seconly, you should define what each element is going to look like, also in a XML file.

here is /res/layout/single_item_layout.xml

<?xml version="1.0" encoding="utf-8"?><!-- This file defines the layout for each item that will be placed in the ListView --><TextView xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/single_item"android:layout_width="fill_parent"android:layout_height="wrap_content"android:text="TextView"/>

 

3. Finaly, you begin to type your logical code in a Java file.

here is src/org/vhow/android/listview/MyListView.java

/** * ListView is a ViewGroup that creates a list of scrollable items. * The list items are automatically inserted to the list using a ListAdapter. */package org.vhow.android.listview;import android.app.ListActivity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.TextView;import android.widget.Toast;/** * The activity extends from ListActivity, instead of Activity */public class MyListView extends ListActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Get the string array(defined in strings.xml) which is going to be displayed String[] provinces = getResources().getStringArray(R.array.str_provinces); // Provide the cursor for the list view. setListAdapter(new ArrayAdapter<String>(this, R.layout.single_item_layout, provinces)); // Get the activity's list view widget. ListView lv = getListView(); lv.setTextFilterEnabled(true); lv.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id){Toast.makeText(getApplicationContext(), ((TextView)view).getText(), Toast.LENGTH_SHORT).show();} }); }}