Question

我创建了一个ListView，其中包含一行，而该行又包含文本和按钮。我们的想法是让按钮用作删除按钮以删除行从列表和数据库。

为了做到这一点，我创建了一个适配器来处理按钮点击。这段代码如下。删除数据库记录工作正常，但我还没有成功刷新 ListView所以不再显示记录。

公共类FeedArrayAdapter扩展了ArrayAdapter {

private ARssEReaderDBAdapter dba;
private String TAG = "FeedArrayAdapter";
private View v;
private ListView feedList;

private OnClickListener btnDeleteFeedListener = new OnClickListener(){

    public void onClick(View pView) {
        dba = new ARssEReaderDBAdapter(getContext());

        Integer objInt = (Integer) pView.getTag();
        dba.open();
        dba.deleteFeed(objInt);
        dba.close();

        Log.w(TAG, "Database row, " + pView.getTag() + " got clicked.");
    }
};

public FeedArrayAdapter(Context context, int textViewResourceId, List<Feed> items) {
    super(context, textViewResourceId, items);
}

@Override
public View getView(int position, View convertView, ViewGroup parent){
    Log.w(TAG, "getView");
    v = convertView;
    if (v == null) {
        LayoutInflater vi = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = vi.inflate(R.layout.feedlistrow, null);
    }
    Feed feed = getItem(position);
    if (feed != null){
        v.setTag(feed.getFeedId());
        TextView title = (TextView)v.findViewById(R.id.TextView01);
        if (title != null){
            title.setText(feed.getTitle());
        }
        Button btnDelete = (Button)v.findViewById(R.id.btnDelete);
        btnDelete.setTag(feed.getFeedId());
        btnDelete.setOnClickListener(btnDeleteFeedListener); //
    }
    return v;
}

}

非常感谢任何帮助。

理查德

Answer 1

也许你正在寻找notifyDataSetChanged()。确保从UI线程中调用它。

public void notifyDataSetChanged ()

Since: API Level 1
Notifies the attached View that the underlying data has been changed and it should refresh itself.

单击该列表视图的行中的按钮刷新列表视图

1 个答案: