平时都是用simpleAdapter,今天学习了BaseAdapter,写了个demo记录一下,以备不时之需。如果有写错的希望大家指出
AdapterActivity:
package com.example.myadapter01;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.w3c.dom.Text;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class AdapterActivity extends Activity {
private List<Map<String,Object>> list = null;
private HashMap<String, Object> map = null;
private ListView listView;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.list_view);
list = new ArrayList<Map<String,Object>>();
// 添加数据到list
for(int i = 0;i<4;i++){
map = new HashMap<String, Object>();
map.put("name", "HJ");
map.put("number", "1234567");
list.add(map);
}
listView = (ListView)findViewById(R.id.list_view);
Myadapter adapter = new Myadapter(this);
listView.setAdapter(adapter);
}
// 自定义适配器
public class Myadapter extends BaseAdapter{
private LayoutInflater inflater;
public Myadapter(Context context){
inflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// 创建View对象
convertView = inflater.inflate(R.layout.item, null);
if(list.get(position)!=null){
// 添加数据
TextView name = (TextView)convertView.findViewById(R.id.name);
name.setText(list.get(position).get("name").toString());
//
TextView number = (TextView)convertView.findViewById(R.id.number);
number.setText(list.get(position).get("number").toString());
}
return convertView;
}
}
}
list_view.xml
<?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" >
<ListView
android:id="@+id/list_view"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
></ListView>
</RelativeLayout>
item.xml
<?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"
android:orientation="horizontal" >
<TextView
android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="25sp"
android:text="HJ"
/>
<TextView
android:id="@+id/number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginRight="70dp"
android:text="1234567"
android:textSize="25sp" />
</RelativeLayout>