Question

我有一个ListView，一个CustomAdapter和一个xml文件＆＃34; row_layout＆＃34;为ListView定义一行。＆＃34; row_layout＆＃34;有一个TextView和一个按钮。我的问题是单击按钮，如何从相应的TextView获取访问信息？目前，我从listview的最后一行中的textview获取信息。

public class CustomAdapter extends BaseAdapter implements ListAdapter {
     private ArrayList<String> list = new ArrayList<String>();
     private Context context;
     View view;

public CustomAdapter(ArrayList<String> list, Context context) {
      this.list = list;
      this.context = context;
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    view = convertView;
    if (view == null) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = inflater.inflate(R.layout.row_layout, null);
    }

    //Handle buttons and add onClickListeners
    Button myButton = (Button)view.findViewById(R.id.myButton);

    myButton.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            //DOES NOT WORK HERE AS PLANNED
            TextView tv = (TextView) view.findViewById(R.id.myTextView);
            notifyDataSetChanged();
        }
    });

    return view;
    }

}

}

以下是xml布局：

<RelativeLayout android:id="@+id/root">
    <TextView android:id="@+id/myTextView"/>
    <Button android:id="@+id/myButton"/>
</RelativeLayout>

Answer 1

你必须替换

TextView tv = (TextView) layout.findViewById(R.id.myTextView);

带

TextView tv = (TextView) view.findViewById(R.id.myTextView);

您会发现Textview属于您的实际行（在您的代码中为变量view），而不是您的基本布局。

编辑：您的通胀应该是

view=inflater.inflate(R.layout.row_layout, parent, false);

Answer 2

替换此

RunAction(new CCFollow(yourNode, CCRect.Zero));

使用：

     view = inflater.inflate(R.layout.row_layout, null);

Answer 3

view = convertView;
if (view == null) {
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    view = inflater.inflate(R.layout.row_layout, null);
//Handle buttons and add onClickListeners
Button myButton = (Button)view.findViewById(R.id.myButton);
TextView textview = (TextView)view.findViewById(R.id.myTextView);}

myButton.setOnClickListener(new View.OnClickListener(){
    @Override
    public void onClick(View v) {
        //DOES NOT WORK HERE AS PLANNED
        textview.getText().toString();
        notifyDataSetChanged();
    }
});

return view;
}

ListView元素之间的通信

3 个答案: