Android learning notes: simple use of ListView, androidlistview

Android learning notes: simple use of ListView, androidlistview

(1)

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <ListView        android:id="@+id/listView1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignParentTop="true" >    </ListView></RelativeLayout>

(2)

Package com. example. listview1; import java. util. arrayList; import java. util. list; import android. r. anim; 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. listAdapter; import android. widget. listView; import Droid. widget. toast; public class MainActivity extends Activity {private ListView listView1; private ArrayAdapter <String> arrayAdapter; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); listView1 = (ListView) this. findViewById (R. id. listView1); // it can be set to optional or single-choice CHOICE_MODE_SINGLE. The following simple should also correspond to listView1.setChoiceMode (Li StView. CHOICE_MODE_MULTIPLE); // sets the selected mode of listView1. arrayAdapter = new ArrayAdapter <String> (MainActivity. this, android. r. layout. listener, getDataSource (); listView1.setAdapter (arrayAdapter);/** listView1 Click Event */listView1.setOnItemClickListener (new OnItemClickListener () {@ Overridepublic void onItemClick (AdapterView <?> Parent, View view, int position, long id) {Toast. makeText (MainActivity. this, "-->" + arrayAdapter. getItem (position), Toast. LENGTH_SHORT ). show () ;}}) ;}public List <String> getDataSource () {List <String> list = new ArrayList <String> (); for (int I = 0; I <30; I ++) {list. add ("jack" + I);} return list;} @ Overridepublic boolean onCreateOptionsMenu (Menu menu) {getMenuInflater (). inflate (R. menu. main, menu); return true ;}}