Android(安卓): 继承BaseAdapter对ListView进行填充

Android : 继承BaseAdapter对ListView进行填充
import java.util.ArrayList;import java.util.List;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;class User {private String userid;、private String username;     public String getUserid() {        return userid;     }    public void setUserid(String userid) {        this.userid = userid;     }    public String getUsername() {         return username;    }    public void setUsername(String username) {       this.username = username;   }} class ViewHolder {     TextView textviewUserId;    TextView textviewUserName; } class UserInfoAdapter extends BaseAdapter {    private LayoutInflater inflater;    private List<User> list;    public UserInfoAdapter(Context context, List<User> list) {       // TODO Auto-generated constructor stub        inflater = LayoutInflater.from(context);        this.list = list;     }    @Override    public int getCount() {         // TODO Auto-generated method stub         return list.size();     }     @Override    public User getItem(int position) {        return list.get(position);    }      @Override     public long getItemId(int position) {        // TODO Auto-generated method stub        return position;     }      @Override     public View getView(int position, View view, ViewGroup viewgroup) {         ViewHolder viewHolder = null;         if (view == null) {             view = inflater.inflate(R.layout.user_detail, null);            viewHolder = new ViewHolder();            viewHolder.textviewUserId = (TextView) view                     .findViewById(R.id.textviewUserId);             viewHolder.textviewUserName = (TextView) view                    .findViewById(R.id.textviewUserName);           view.setTag(viewHolder);         } else {             viewHolder = (ViewHolder) view.getTag();         }         viewHolder.textviewUserId.setText(list.get(position).getUserid());         viewHolder.textviewUserName.setText(list.get(position).getUsername());         return view;     }  }   class NewsActivity extends Activity{     private List<User> list = null;     private UserInfoAdapter adapter;     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.news_list);         list = new ArrayList<User>();         //Maybe here you will call json...         User user=new User();         user.setUserid("");         user.setUsername("Zhou, Biwen");         list.add(user);         adapter=new UserInfoAdapter(this,list);         ListView listView = (ListView) findViewById(R.id.userlistview);         listView.setAdapter(adapter);              } }   //news_detail.xml //<?xml version="." encoding="utf-"?> //<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" //android:layout_width="wrap_content" //android:layout_height="wrap_content" //android:orientation="horizontal"> //<LinearLayout //android:layout_width="fill_parent" //android:layout_height="wrap_content" //android:orientation="vertical" //android:paddingLeft="px" //android:paddingRight="px" //android:layout_marginTop="px" //android:layout_marginBottom="px"> //<TextView //android:id="@+id/textviewUserId" //android:layout_width="wrap_content" //android:layout_height="wrap_content" //android:textSize="px" //android:textColor="#" //android:layout_alignParentLeft="true"> //</TextView> //<TextView //android:id="@+id/textviewUserName" //android:layout_width="wrap_content" //android:layout_height="wrap_content" //android:layout_alignParentRight="true" //android:textColor="#fa" //android:textSize="px"> //</TextView> //</LinearLayout> //</LinearLayout>
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