Android基础(六) ListView - ArrayAdapter

一、概述

ListView和SpinnerView一样适合用来存放拥有多个元素的数据集。下面Demo里面，先定义了一个String数组，然后用它来构建一个ArrayAdapter。再将ListView实例与ArrayAdapter关联。

二、实例

【效果图】
 


【代码节选】

package enleo.ListViewExample;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class ListViewExample extends Activity {

String[] presidents = {
"Dwight D. Eisenhower",
"John F. Kennedy",
"Lyndon B. Johnson",
"Richard Nixon",
"Gerald Ford",
"Jimmy Carter",
"Ronald Reagan",
"George H. W. Bush",
"Bill Clinton",
"George W. Bush",
"Barack Obama"
};

private ListView mLv;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listview);

mLv = (ListView)findViewById(R.id.listView1);
mLv.setAdapter((new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, presidents)));

mLv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// TODO Auto-generated method stub
Toast.makeText(getBaseContext(),
"You have clicked "+presidents[position]+" position="+position+" id="+id,
Toast.LENGTH_SHORT).show();
}

});
}
}

 

 

三、注意

1.继承关系





2.public void onItemClick(AdapterView<?> parent, View view, int position, long id) 

postion参数 和 id参数， 这两个参数的异同以后再分析。