1、main.xml
<?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="vertical" > <ListView android:id="@+id/personLV"
android:layout_width="fill_parent"
android:layout_height="fill_parent" /> </LinearLayout>
2、item.xml
<?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" > <TextView android:id="@+id/idTV"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:padding="10dp"
android:textSize="20sp"
/> <TextView android:id="@+id/nameTV"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:padding="10dp"
android:textSize="20sp"
/> <TextView android:id="@+id/balanceTV"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="2"
android:padding="10dp"
android:textSize="20sp"
/> </LinearLayout>
3、MainActivity
package com.njupt.listview; import java.util.List; import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView; public class MainActivity extends Activity { private ListView personLV;
private List<Person> persons; @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main); personLV = (ListView) findViewById(R.id.personLV); PersonDao dao = new PersonDao(this); persons = dao.queryAll();
personLV.setAdapter(new MyBaseAdapter());//给ListView添加adapter,按照adapter中的方法给ListView添加条目
} private class MyBaseAdapter extends BaseAdapter{// 定义Adapter, 把每个Person对象生成一个条目, 将所有条目装入ListView @Override
public int getCount() {//获取条目数量
return persons.size();
} @Override
public Object getItem(int position) {//获取指定对象
return persons.get(position);
} @Override
public long getItemId(int position) {//获取指定对象的id
return position;
} @Override
public View getView(int position, View convertView, ViewGroup parent) {// 返回指定位置上的条目, 条目会被自动添加到ListView中 View item = View.inflate(getApplicationContext(), R.layout.item, null);// 根据布局文件创建View(LinearLayout) TextView idTV = (TextView) item.findViewById(R.id.idTV);// 获取这个新生成的View中的TextView
TextView nameTV = (TextView) item.findViewById(R.id.nameTV);
TextView balanceTV = (TextView) item.findViewById(R.id.balanceTV); Person p = persons.get(position);// 根据位置获取Person对象
idTV.setText(p.getId() + "");// 给TextView设置文本
nameTV.setText(p.getName());
balanceTV.setText(p.getBalance()+""); return item;
} }
@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;
} }
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结果如下所示: