Question

适配器

import ...;
public class CustomAdapter extends ArrayAdapter<MyObject> {
    public CustomAdapter(Context context, ArrayList<MyObject> objects) {
        super(context, 0, objects);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = LayoutInflater.from(getContext());
        View view1 = inflater.inflate(R.layout.row, parent, false);

        MyObject myobj = getItem(position);
        String objectName = myobj.getName();

        TextView name_TV = (TextView) view1.findViewById(R.id.name);
        name_TV.setText(objectName);
        return view1; 
    } 
}

MainActivity

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ArrayList <MyObject> obj_list = new ArrayList<MyObject>();
    obj_list.add(new MyObject("user1", 123));
    obj_list.add(new MyObject("user2", 123));
    obj_list.add(new MyObject("user3", 123));

    CustomAdapter adptr = new CustomerAdapter(this, obj_list);
    ListView lv = (ListView) findViewById(R.id.abcListview);
    lv.setAdapter(adptr);
}

MyObject类

public class MyObject{
     String a;
     int b;
     public MyObject(String a, int b){
         this.a = a;
         this.b = b; 
     }
     public String getName(){
         return a;
     }
}

代码将生成3个列表视图项并打印“user3”三次，而不是一次打印“user1”，一次打印“user2”，一次打印“user3”。

修改上述代码的结果：http://imgur.com/BBJS0wt

Answer 1

您应该使用ViewHolder范例。

<强> EDITED

问题出在您的getView()，试试这个：

public static class ViewHolder {

 public TextView name;

}
MyObject myobj;

@Override
public View getView(int position, View convertView, ViewGroup parent) {

   View view1 = convertView;
   ViewHolder holder;

  if (null == view1) {

    holder = new ViewHolder();
    LayoutInflater inflater = LayoutInflater.from(getContext());
    view1 = inflater.inflate(R.layout.row, parent, null);

    holder.name = (TextView) view1.findViewById(R.id.name);

    view1.setTag(holder);

   }
   else
    holder = (ViewHolder) view1.getTag();

    myobj = getItem(position);
    if (myobj == null)
        return view1;

    String objectName = myobj.getName();
     holder.name.setText(objectName);

   return view1; 

}

希望这会有所帮助

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