Activity中与ListActivity中使用listview区别

一.Activity中与ListActivity中使用listview区别（本身没多大区别，只是ListActivity在listview的显示上做了一些优化）

Activity中使用Listview步骤：

1.xml布局中,ListView标签id可以任意取值如：

<ListView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:id="@+id/listview" 
　　　　/>

 

2.程序中通过findViewById获取该Listview对象如：

ListView lv = (ListView)findViewById(R.id.listview);

3.实例化Adapter

4.然后通过listView.setAdapter(adapter);  设置adapter绑定数据如：

lv.setAdapter(adapter);

ListActivity中使用Listview步骤：

1.xml布局中,ListView标签id必须写成android:id="@+id/android:list"如：

<ListView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:id="@+id/android:list" 

        />

2.实例化Adapter

3.然后通过setListAdapter(adapter);设置adapter绑定数据

setListAdapter(adapter);

补充：程序中如果想获取Listview对象，通过getListView()方法

ListView lv = getListView();

上图：

源码目录结构：

                                             

完整源码：

1>AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.bravestarr.app.listview1"

    android:versionCode="1"

    android:versionName="1.0" >



    <uses-sdk android:minSdkVersion="7" />



    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name" >

        <activity

            android:name=".MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />



                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <activity

            android:name=".ListViewInActivity"

            android:label="@string/app_name" >

        </activity>

        <activity

            android:name="com.bravestarr.app.listview1.ListViewInListActivity"

            android:label="@string/app_name" >

        </activity>

    </application>



</manifest>

2>main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <Button 

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/btn1"

        android:id="@+id/btn1"

        />

    <Button 

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/btn2"

        android:id="@+id/btn2"

        />

</LinearLayout>

3>activity.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >



    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="@string/listview_in_activity" />

    <ListView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:id="@+id/listview" 

        />

</LinearLayout>

4>listactivity.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >



    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="@string/listview_in_listactivity" />

    <ListView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:id="@+id/android:list" 

        />

</LinearLayout>

5>mylist_item.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:id="@+id/item"/>

6>strings.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="btn1">继承自Activity的listview使用</string>

    <string name="btn2">继承自ListActivity的listview使用</string>

    <string name="listview_in_activity">说明:Activity中使用Listview\nxml布局中,ListView标签id可以任意取值,\n程序中通过findViewById找到该Listview对象,\n然后通过listView.setAdapter(adapter);  绑定设置adapter绑定数据</string>

    <string name="listview_in_listactivity">说明:ListActivity中使用Listview\nxml布局中,ListView标签id必须写成android:id="@+id/android:list",\n程序中通过getListView()找到该Listview对象,\n然后通过setListAdapter(adapter);设置adapter绑定数据,无需得到listview</string>

    <string name="app_name">ListView的使用</string>

</resources>

7>MainActivity.java

package com.bravestarr.app.listview1;



import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;



/**

 * @Author    BraveStarr

 * @QQ        1733259520

 * @Blog    http://www.cnblogs.com/bravestarrhu/,http://blog.sina.com.cn/wanghubravestarr

 *

 */

public class MainActivity extends Activity {



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        Button btn1,btn2;

        btn1 = (Button)findViewById(R.id.btn1);

        btn2 = (Button)findViewById(R.id.btn2);

        btn1.setOnClickListener(l);

        

        btn2.setOnClickListener(l);

    }

    

    private View.OnClickListener l = new View.OnClickListener() {

        Intent i;

        @Override

        public void onClick(View v) {

            switch(v.getId()){

            case R.id.btn1:

                i = new Intent(MainActivity.this,ListViewInActivity.class);

                startActivity(i);

                break;

            case R.id.btn2:

                i = new Intent(MainActivity.this,ListViewInListActivity.class);

                startActivity(i);

                break;

            }

        }

    };

}

8>ListViewInActivity.java

package com.bravestarr.app.listview1;



import android.app.Activity;

import android.os.Bundle;

import android.widget.ArrayAdapter;

import android.widget.ListView;



public class ListViewInActivity extends Activity {

    private static final String[] names = new String[]{"斗破苍穹","网游之终极牧师","琴帝"};

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity);

        ListView lv = (ListView)findViewById(R.id.listview);

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.mylist_item, names);

        lv.setAdapter(adapter);

    }

}

9>ListViewInListActivity.java

package com.bravestarr.app.listview1;



import android.app.ListActivity;

import android.os.Bundle;

import android.widget.ArrayAdapter;



/**

 * @Author    BraveStarr

 * @QQ        1733259520

 * @Blog    http://www.cnblogs.com/bravestarrhu/,http://blog.sina.com.cn/wanghubravestarr

 *

 */

public class ListViewInListActivity extends ListActivity {

    private static final String[] names = new String[]{"斗破苍穹","网游之终极牧师","琴帝"};

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.listactivity);

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.mylist_item, names);

        setListAdapter(adapter);

    }



}

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