android学习之SimpleAdapter

这篇文章我们来谈谈SimpleAdapter，ArrayAdapter就不谈了，因为感觉确实太简单了而且感觉在开发中也用不上，然后SimpleAdapter在开发中感觉可以简单的使用，而且本身也不是很难，至于BaseAdapter也会在后面的文章中谈论到。这里我们先谈谈MVC的设计把，一般来说M代码模型层，也就是数据的处理，在我们这篇文章中，也就是数据的准备，而V层也就是我们的显示层，也就是这篇文章中的ListView，最后就是C层，也就是控制层，也就是这篇文章中的Adapter，代码中都添加了注释，相信大家都能看懂：

代码：

package com.jk.simpleadapterdemo;import java.util.ArrayList;import java.util.HashMap;import android.os.Bundle;import android.app.Activity;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 implements OnItemClickListener {ListView lv;ArrayList<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);init();}private void init() {// bundle the lv with the idlv = (ListView) findViewById(R.id.lv);// prepare the dataHashMap<String, Object> row0 = new HashMap<String, Object>();row0.put("image", R.drawable.btn_sound);row0.put("name", "btn_sound");data.add(row0);HashMap<String, Object> row1 = new HashMap<String, Object>();row1.put("image", R.drawable.btn_sound_off);row1.put("name", "btn_sound_off");data.add(row1);HashMap<String, Object> row2 = new HashMap<String, Object>();row2.put("image", R.drawable.btn_sound_off_press);row2.put("name", "btn_sound_off_press");data.add(row2);HashMap<String, Object> row3 = new HashMap<String, Object>();row3.put("image", R.drawable.btn_sound_press);row3.put("name", "btn_sound_press");data.add(row3);HashMap<String, Object> row4 = new HashMap<String, Object>();row4.put("image", R.drawable.btn_start);row4.put("name", "btn_start");data.add(row4);HashMap<String, Object> row5 = new HashMap<String, Object>();row5.put("image", R.drawable.btn_start_press);row5.put("name", "btn_start_press");data.add(row5);/** * setAdapter 1.context 2.datasource 3.the layout of the item 4.the data * should be show 5.the data of the style */SimpleAdapter adapter = new SimpleAdapter(this, data, R.layout.lv_row,new String[] { "image", "name" }, new int[] { R.id.iv_row,R.id.tv_row });// set the adapterlv.setAdapter(adapter);// set the listenerlv.setOnItemClickListener(this);}@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {// deal the onclick event show the position item that you touchedToast.makeText(this, "position" + (arg2 + 1), Toast.LENGTH_SHORT).show();}}

因为这篇文章谈论的是ListView，所以我将布局文件的代码也贴上

<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"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <ListView         android:id="@+id/lv"        android:layout_height="wrap_content"        android:layout_width="wrap_content"></ListView></RelativeLayout>

<?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="horizontal" >    <ImageView         android:id="@+id/iv_row"        android:layout_height="48dp"        android:layout_width="48dp"        />    <TextView         android:id="@+id/tv_row"        android:layout_height="match_parent"        android:layout_width="match_parent"        android:gravity="center"/></LinearLayout>

最后附带一张结果运行图