ListView_SimpleAdapter

一:java代码.

MainActivity：

package com.action;import android.app.Activity;import android.app.AlertDialog;import android.app.AlertDialog.Builder;import android.content.DialogInterface;import android.content.Intent;import android.content.DialogInterface.OnClickListener;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.ListView;import android.widget.SimpleAdapter;import android.widget.AdapterView.OnItemClickListener;import android.widget.AdapterView.OnItemLongClickListener;import java.util.*;import com.util.*;/**主界面的Activity*/public class MainActivity extends Activity {/** Called when the activity is first created. */private ListView lv;private List<Map<String, Object>> lsmap;private int index;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);lv = (ListView) findViewById(R.id.main_lv);// 获取保存有数据的List集合对象lsmap = new DataUtil().findData();// 创建简单适配器对象/** * 参数1：上下文关系对象 参数2: 绑定数据的List集合，此List集合的对象元素为Map集合 参数3: * 子布局视图，子布局视图用于设置Map集合中保存的数据 参数4: Map集合中的主键名称 参数5: * 子布局视图上的控件（如ImageView和TextView） * */SimpleAdapter sa = new SimpleAdapter(this, lsmap, R.layout.list_item,new String[] { "icon", "title", "content" }, new int[] {R.id.item_iv, R.id.item_title, R.id.item_content });// 将适配器传递给ListViewlv.setAdapter(sa);/** listView的选项点击事件 */lv.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {// TODO Auto-generated method stub// 获取选中的索引位置，它也是list集合的索引位置index = arg2;Map<String, Object> map = lsmap.get(index);Integer id = (Integer) map.get("icon");Intent in = new Intent();in.setClass(MainActivity.this, ShowImageActivity.class);in.putExtra("icon", "" + id);MainActivity.this.startActivity(in);}});/** ListView的长按事件 */lv.setOnItemLongClickListener(new OnItemLongClickListener() {@Overridepublic boolean onItemLongClick(AdapterView<?> arg0, View arg1,int arg2, long arg3) {String[] op = { "修改信息", "删除信息" };AlertDialog.Builder ab = new Builder(MainActivity.this);ab.create();ab.setTitle("选择操作");ab.setItems(op, new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubswitch (which) {case 0:System.out.println("进行修改");break;case 1:System.out.println("进行删除");break;default:break;}}});ab.setPositiveButton("确定", new OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stub}});ab.show();return false;}});}}

ShowImageActivity:

package com.action;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;/**显示图片的Activity*/public class ShowImageActivity extends Activity {private ImageView iv;private Button btback;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.showimage_layout);//获取意图Intent in=getIntent();//获取资源对象String id=in.getStringExtra("icon");int rid=Integer.parseInt(id);iv=(ImageView) findViewById(R.id.showimage_iv);iv.setImageResource(rid);btback=(Button) findViewById(R.id.showimage_btback);btback.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent inr=new Intent();inr.setClass(ShowImageActivity.this,MainActivity.class);startActivity(inr);finish();}});}}

DataUtil:

package com.util;import java.util.*;import com.action.*;/**提供数据源*/public class DataUtil {private List<Map<String,Object>> lsmap=new ArrayList<Map<String,Object>>();public List<Map<String,Object>> findData(){Map<String,Object> map1=new HashMap<String, Object>();map1.put("icon",R.drawable.ascent);map1.put("title","月亮");map1.put("content","静夜思，李白，晚唐作品");lsmap.add(map1);Map<String,Object> map2=new HashMap<String, Object>();map2.put("icon",R.drawable.home);map2.put("title","归家");map2.put("content","家庭，陆游，南宋作品");lsmap.add(map2);Map<String,Object> map3=new HashMap<String, Object>();map3.put("icon",R.drawable.autumn);map3.put("title","秋叶");map3.put("content","渔舟晚照，王维，晚唐作品");lsmap.add(map3);Map<String,Object> map4=new HashMap<String, Object>();map4.put("icon",R.drawable.azul);map4.put("title","海子");map4.put("content","孤舟晚归，苏轼，北宋作品");lsmap.add(map4);Map<String,Object> map5=new HashMap<String, Object>();map5.put("icon",R.drawable.bliss);map5.put("title","草原");map5.put("content","敕勒川，岑蔘，南宋作品");lsmap.add(map5);return lsmap;}}

二:布局文件.

主布局文件:main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/linearLayout1"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:orientation="vertical" > <ListView        android:id="@+id/main_lv"        android:layout_width="match_parent"        android:layout_height="wrap_content" >    </ListView></LinearLayout>

ListView的子布局视图:list_item.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" >    <LinearLayout        android:id="@+id/linearLayout1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:orientation="horizontal" >        <ImageView            android:id="@+id/item_iv"            android:layout_width="80dp"            android:layout_height="90dp"            android:contentDescription="@string/desc"            android:src="@drawable/ic_launcher" />        <LinearLayout            android:id="@+id/linearLayout2"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:gravity="center_vertical"            android:orientation="vertical" >            <TextView                android:id="@+id/item_title"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:textAppearance="?android:attr/textAppearanceMedium" />            <TextView                android:id="@+id/item_content"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:textAppearance="?android:attr/textAppearanceMedium" />        </LinearLayout>    </LinearLayout></LinearLayout>

用于显示图片的布局:showimage_layout.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <LinearLayout        android:id="@+id/linearLayout1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="vertical" >        <ImageView            android:id="@+id/showimage_iv"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:contentDescription="@string/desc"            android:src="@drawable/ascent" />    </LinearLayout>    <LinearLayout        android:id="@+id/linearLayout2"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center"        android:orientation="vertical" >        <Button            android:id="@+id/showimage_btback"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="@string/btback" />    </LinearLayout></LinearLayout>

效果如下图所示:

点击item,显示这张图片;长按图片弹出一个对话框.