Android开发学习：[1]列表视图(ListView)

1、一、直接使用ListView组件创建在布局文件中首先添加ListView代码如下：<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/LinearLayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".MainActivity" > <ListView android:id="@+id/listView1" android:layout_width="match_parent" android:layout_height="wrap_content" android:entries="@array/cytpe" > </ListView></LinearLayout>

2、这里使用了名称为ctype的数组资源，因此我们要在res/values目录中创建一个定义的数组资源的xml文件arrays.xml代码如下：<?xml version="1.0"encoding="UTF-8"?><resources><string-array name="cytpe"><item>情景模式</item><item>主题模式</item><item>手机</item><item>程序管理</item><item>通话设置</item><item>连接功能</item></string-array></resources>

3、下面通过适配器来指定列表项来创建ListView布局代码：<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:id="@+id/LinearLayout1"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"tools:context=".MainActivity"><ListViewandroid:id="@+id/listView1"android:layout_width="match_parent"android:layout_height="wrap_content"android:divider="@drawable/ic_launcher"android:dividerHeight="3px"android:footerDividersEnabled="false"android:headerDividersEnabled="false"></ListView></LinearLayout>

4、Java代码：package com.basillee.blogdemo;import java.lang.annotation.Retention;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.LinearLayout;import android.widget.ListView;import android.widget.Toast;publicclassMainActivity extends Activity {@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);ListView listView=(ListView)findViewById(R.id.listView1);ArrayAdapter<CharSequence>adapter=ArrayAdapter.createFromResource(this,R.array.cytpe,android.R.layout.simple_list_item_single_choice);listView.setAdapter(adapter);listView.setOnItemClickListener(newOnItemClickListener() {@OverridepublicvoidonItemClick(AdapterView<?> parent, View arg1,intpos,longid) {String result=parent.getItemAtPosition(pos).toString();Toast.makeText(getApplicationContext(), result, Toast.LENGTH_LONG).show();}});}}

5、二、让Activity继承ListActivity实现：如果程序的窗口仅仅需要显示一个列表，则可以直接让Activity继胱絮枳砖承ListActivity来实现。继承ListActivity的类中无需调用setContentView方法来显示页面，而是可以直接为其设置适配器，从而显示一个列表。废话少说直接看看代码大家就都懂了：package com.basillee.blogdemo;import java.lang.annotation.Retention;import java.util.List;import android.os.Bundle;import android.app.Activity;import android.app.ListActivity;import android.view.Menu;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ArrayAdapter;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.Toast;publicclassMainActivity extends ListActivity{@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);String []cytpeStrings=newString[]{"情景模式","主题模式","手机","程序管理"};ArrayAdapter<String>adapter=newArrayAdapter<String>(this, android.R.layout.simple_list_item_single_choice,cytpeStrings);setListAdapter(adapter);}@OverrideprotectedvoidonListItemClick(ListView l, View v,intposition,longid) {// TODO Auto-generated method stubsuper.onListItemClick(l, v, position, id);String resultString=l.getItemAtPosition(position).toString();Toast.makeText(getApplicationContext(), resultString, Toast.LENGTH_LONG).show();}}

6、大家可以在在自己的虚拟机上面运行试试。