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);}}
源码打包下载
转载于:https://blog.51cto.com/huyusheng/1925487