Activity中与ListActivity中使用listview区别

电玩女神 2021-12-15 05:27 252阅读 0赞

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：

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：

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：

![Image 1][]![Image 1][]![Image 1][]

源码目录结构：

![Image 1][]

完整源码：

1>AndroidManifest.xml

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<?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>

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2>main.xml

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<?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>

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3>activity.xml

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<?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>

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4>listactivity.xml

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<?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>

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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

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<?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>

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7>MainActivity.java

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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;
                }
            }
        };
    }

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8>ListViewInActivity.java

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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);
        }
    }

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9>ListViewInListActivity.java

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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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转载于:https://www.cnblogs.com/fx2008/p/3140483.html

[Image 1]: 
[copycode.gif]: /images/20211214/439b9b90db2046db88f9c18e7633e534.png