ListView显示信息列表

在主布局文件中声明一个ListView控件

<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
</ListView>

在Main.activity中声明并获取此对象

private ListView listView;
listView = (ListView) findViewById(R.id.listView1);

定义ListView中每一行的布局样式

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<ImageView
android:id="@+id/appIcon"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:scaleType="fitXY"
android:src="@drawable/ic_launcher"/>

<TextView
android:id="@+id/appName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/appIcon"
android:text="AppName"
android:textSize="24sp" />

<TextView
android:id="@+id/appPackage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/appName"
android:layout_below="@+id/appName"
android:text="package"
android:textAppearance="?android:attr/textAppearanceMedium" />

<TextView
android:id="@+id/appSize"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/appPackage"
android:layout_toRightOf="@+id/appIcon"
android:text="TextView" />

</RelativeLayout>

定义数据源

/*
*数据源的格式是一个List集合在此集合中，
*每一项又是一个Map集合，
*此Map泛型定义为String，Object
*/
private List<Map<String, Object>> data;

/*
*此List即为上面Map中的object
*此处的AppBean是获取手机中已安装的所有应用信息
*/
private ArrayList<AppBean> src;

定义适配器

simpleAdapter = new SimpleAdapter(
this,
data,
R.layout.item,
new String[] { "appIcon", "appName", "appPackage", "appSize" },
new int[] { R.id.appIcon, R.id.appName, R.id.appPackage, R.id.appSize }
);

android.widget.SimpleAdapter.SimpleAdapter(
Context context, //上下文
List<? extends Map<String, ?>> data, //数据源
int resource, //每一行的布局文件
//以下两个参数主要用于Map映射
String[] from, //Map中的每一个Key
int[] to//布局文件中对应的id，Map中的Object
)

为ListView绑定适配器

listView.setAdapter(simpleAdapter);

为ListView 绑定监听器

public class MainActivity extends Activity
implements OnScrollListener, OnItemClickListener

listView.setOnScrollListener(this);
listView.setOnItemClickListener(this);

@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO Auto-generated method stub

//此监听器中的此方法可实现动态下拉刷新

if (scrollState == SCROLL_STATE_IDLE) {
if (view.getLastVisiblePosition() == view.getCount() - 1) {
Toast.makeText(this, "继续向下滑动刷新列表", Toast.LENGTH_SHORT).show();
Map<String, Object> temp = new HashMap<String, Object>();
AppBean ap = src.get(0);
temp.put("appIcon", ap.getAppIcon());
temp.put("appName", ap.getAppName());
temp.put("appPackage", ap.getAppPackageName());
temp.put("appSize", ap.getAppSizeM());

data.add(temp);

simpleAdapter.notifyDataSetChanged();

listView.setSelection(simpleAdapter.getCount()-1);
}
}
}

@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
// TODO Auto-generated method stub

}

@Override
public void onItemClick(
AdapterView<?> parent,View view,int position,long id) {

// TODO Auto-generated method stub
Map<String,Object> temp = (Map<String, Object>) listView.getItemAtPosition(position);
Toast.makeText(this,"已选中："+temp.get("appName"),Toast.LENGTH_SHORT).show();
}

如何自定义布局文件中对数据源中对数据的使用方式

SimpleAdapter.ViewBinder viewBinder = new SimpleAdapter.ViewBinder() {

@Override
public boolean setViewValue(View view, Object data, String textRepresentation) {
// TODO Auto-generated method stub

if (view instanceof ImageView) {
ImageView iv = (ImageView) view;
iv.setImageDrawable((Drawable) data);
return true;
}

return false;
}
};
simpleAdapter.setViewBinder(viewBinder);