MainActivity如下:
package cc.ca;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.SimpleAdapter;
/**
* Demo描述:
* notifyDataSetChanged使用示例
*
*/
public class MainActivity extends Activity {
private ListView mListView;
private SimpleAdapter mSimpleAdapter;
private HashMap<String, Object> mHashMap;
private ArrayList<HashMap<String, Object>> mArrayList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
init();
}
private void init() {
mListView = (ListView) findViewById(R.id.listView);
mArrayList = new ArrayList<HashMap<String, Object>>();
addDataForListView();
mSimpleAdapter = new SimpleAdapter(
MainActivity.this,
mArrayList,
R.layout.listviewitem,
new String[] { "id" },
new int[] { R.id.textView });
mListView.setAdapter(mSimpleAdapter);
mListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,long arg3) {
//1 修改原本的数据
HashMap<String, Object> hashMap=mArrayList.get(position);
hashMap.put("id", "click "+position);
//2 重新放入ArrayList中
mArrayList.set(position, hashMap);
//3 Adapter调用notifyDataSetChanged方法
mSimpleAdapter.notifyDataSetChanged();
}
});
}
private void addDataForListView() {
for (int i = 0; i < 20; i++) {
mHashMap = new HashMap<String, Object>();
mHashMap.put("id", "" + i);
mArrayList.add(mHashMap);
}
}
}
main.xml如下:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ListView
android:id="@+id/listView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_centerInParent="true"
/>
</RelativeLayout>
listviewitem.xml如下:
<?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="fill_parent" >
<TextView
android:id="@+id/textView"
android:layout_width="fill_parent"
android:gravity="center"
android:layout_height="80dip"
/>
</RelativeLayout>
