Android之旅第四站——Simpleapter的使用…

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Simpleadapter的使用要比ArrayAdapter的使用复杂一些，必须是map对象类型，每一个map对象包括每一行的控件，可以改变每一个Item，每一行的内容，图片等。

而ArrayAdapter只能用来适配文字的内容，不能更改多个内容。来看一些效果

这里写图片描述

文字内容和后面的图片都可以更改。。

附下代码：

Mainactivity：

package com.example.simpleada;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.Window;import android.widget.ListView;import android.widget.SimpleAdapter;public class MainActivity extends Activity {    private ListView lv;    private List<Map<String, Object>> datas;    private SimpleAdapter adapter;    private String[] xuhao = { "1", "2", "3", "4", "5" };    private String[] name = { "简单爱", "蒲公英的约定", "夜曲", "一路向北", "听妈妈的话" };    private int imags[] = { android.R.drawable.ic_media_play, android.R.drawable.ic_input_get };    private int flags[] = { 0, 0, 0, 1, 1 };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);        setContentView(R.layout.activity_main);        initDatas();        initViews();    }    private void initDatas() {        // TODO Auto-generated method stub        datas = new ArrayList<Map<String, Object>>();        for (int i = 0; i < xuhao.length; i++) {            Map map = new HashMap<String, Object>();            map.put("xuhao", xuhao[i]);            map.put("name", name[i]);            map.put("imags", imags[flags[i]]);            datas.add(map);        }    }    private void initViews() {        // TODO Auto-generated method stub        lv = (ListView) findViewById(R.id.main_lv);        adapter = new SimpleAdapter(this, datas, R.layout.item, new String[] { "xuhao", "name", "imags" },                new int[] { R.id.tv, R.id.tv1, R.id.iv });        lv.setAdapter(adapter);    }    @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;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }}

主xml：

<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="com.example.simpleadapteruse.MainActivity" >    <ListView        android:id="@+id/main_lv"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:background="#0f0"        android:cacheColorHint="#00000000"        android:dividerHeight="5dp" >    </ListView></RelativeLayout>

子布局item：

<?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:gravity="center_vertical"    android:orientation="horizontal" >    <TextView        android:id="@+id/tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textColor="#f00"        android:textSize="20sp" />    <TextView        android:id="@+id/tv1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="20dp"        android:textColor="#f00"        android:textSize="20sp" />    <View        android:layout_width="0dp"        android:layout_height="0dp"        android:layout_weight="1" />    <ImageView        android:id="@+id/iv"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>

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