Android ListView 之 SimpleAdapter 一

SimpleAdapter

Activity

主程序

listItem 中存放所有要显示的所有列数据，每 new 一个map，即 在显示的列表中 新建一行数据，Title (自定义)、Image(自定义) 只是别名，分别对应 每一行的布局 item_layout 中的 资源 ID ， Title => R.id.item_text，Image=> R.id.item_image。

package com.michael.training;

import java.util.ArrayList;
import java.util.HashMap;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main_layout);
		
		ListView listView = (ListView)findViewById(R.id.mListView);
		ArrayList<HashMap<String, Object>> listItem = new ArrayList<HashMap<String, Object>>();
		
        HashMap<String, Object> map = new HashMap<String, Object>();
        map.put("Title", "NO.1	开发环境搭建");
        map.put("Image", R.drawable.item);
        listItem.add(map);
        
        map = null;
        map = new HashMap<String, Object>();
        map.put("Title", "NO.2	四大组件");
        map.put("Image", R.drawable.item);
        listItem.add(map);
		
		SimpleAdapter listAdapter = new SimpleAdapter(	this,
								listItem,
								R.layout.item_layout,
								new String[] {"Title", "Image"},
								new int[] {R.id.item_text,R.id.item_img});
		listView.setAdapter(listAdapter);
		listView.setOnItemClickListener(listener);
	}
	
	OnItemClickListener listener=new OnItemClickListener() {

		@Override
		public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {
			Toast.makeText(getApplicationContext(),((Integer)arg2).toString()+"-----"+((Integer)arg2).toString(), Toast.LENGTH_SHORT).show();
		}
	};
	
	
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}

main_layout.xml

主页面布局

只放了个ListView。

<RelativeLayout   xmlns:android = "http://schemas.android.com/apk/res/android"
     xmlns:tools = "http://schemas.android.com/tools"
     android:layout_width = "match_parent"
     android:layout_height = "match_parent"
     tools:context = ".MainActivity"  >
    <ListView  
         android:id = "@+id/mListView"
         android:layout_width = "match_parent"
         android:layout_height = "match_parent" />
</RelativeLayout>

item_layout.xml

item布局

即ListView中每一行显示的布局，我定义了一个图片和一个文本。

<? xml   version = "1.0"   encoding = "utf-8" ?>
<RelativeLayout   xmlns:android = "http://schemas.android.com/apk/res/android"
     android:layout_width = "fill_parent"
     android:layout_height = "match_parent"
     android:layout_gravity = "center_vertical"   xmlns:tools = "http://schemas.android.com/tools"   tools:ignore = "HardcodedText" >
    <ImageView
         android:id = "@+id/item_img"
         android:layout_width = "wrap_content"
         android:layout_height = "wrap_content"
         android:layout_alignParentTop = "true"
         android:layout_marginLeft = "10dp"
         android:src = "@drawable/item"
         android:contentDescription = "imageflag"   />
    <TextView
         android:id = "@+id/item_text"
         android:layout_width = "wrap_content"
         android:layout_height = "wrap_content"
         android:layout_alignBottom = "@+id/item_img"
         android:layout_alignParentRight = "true"
         android:layout_alignParentTop = "true"
         android:layout_marginTop = "4dp"
         android:layout_marginLeft = "24dp"
         android:layout_toRightOf = "@+id/item_img"
         android:gravity = "center_vertical"
         android:text = "环境搭建"
         android:textStyle = "bold"   />
</RelativeLayout>

成果

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