新手求助:ListView点击删除按钮时,总是最后一个item被删除
0.0 刚开始学写Android的东西。。。在网上学着做了一份动态添加和删除item的代码,但是达不到想要的效果。我让每个item都显示position,然后删除的时候,不管点哪个item的删除,总是最下面的那个item被删除,这是为什么???怎么解决呢??
public class Posting extends Fragment{
private Button button,add;
private TextView text;
private ListView listview;
public MyAdapter adapter;
private View postView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
postView=inflater.inflate(R.layout.post, container, false);
listview = (ListView) postView.findViewById(R.id.cart_sending_listview);
adapter = new MyAdapter(this.getActivity());
listview.setAdapter(adapter);
ImageView add_mission = (ImageView) postView.findViewById(R.id.add_mission);
add_mission.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
adapter.arr.add("");
adapter.notifyDataSetChanged();
}
});
return postView;
}
private class MyAdapter extends BaseAdapter {
private Context context;
private LayoutInflater inflater;
public ArrayList<String> arr;
public MyAdapter(Context context) {
super();
this.context = context;
inflater = LayoutInflater.from(context);
arr = new ArrayList<String>();
for (int i = 0; i < 3; i++) { //listview初始化3个子项
arr.add("");
}
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return arr.size();
}
@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}
@Override
public View getView(final int position, View view, ViewGroup arg2) {
ViewHolder holder=null;
// final TextView edit;
// TODO Auto-generated method stub
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.mission_item, null);
holder.edit = (TextView) view.findViewById(R.id.pro_name);
holder.del = (ImageView) view.findViewById(R.id.del);
view.setTag(holder);
}else
{
holder = (ViewHolder)view.getTag();
}
holder.edit.setText(String.valueOf(position));
holder.del.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
//从集合中删除所删除项的EditText的内容
arr.remove(position);
adapter.notifyDataSetChanged();
}
});
return view;
}
class ViewHolder
{
TextView edit;
ImageView del;
}
}
}