Android如何刷新ExpandableListView中的項目

Question

SQLController dbcon;
@Override
public View getChildView(int groupPosition, final int childPosition,
                     boolean isLastChild, View convertView, ViewGroup parent) {
final String children = (String) getChild(groupPosition, childPosition);
TextView text;
if (convertView == null) {
    convertView = inflater.inflate(R.layout.listrow_details, null);
}
text = (TextView) convertView.findViewById(R.id.textView1);
text.setText(children);
convertView.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        Toast.makeText(activity, children,Toast.LENGTH_SHORT).show();
    }
});

convertView.setOnLongClickListener(new View.OnLongClickListener() {
    @Override
    public boolean onLongClick(View view) {

        AlertDialog.Builder Delete=new AlertDialog.Builder(activity);
        Delete.setTitle("Show Linups Or Delete");
        Delete.setMessage("Press Delete For Remove "+children+" or Press Show Lineups to get Lineups.");
        Delete.setPositiveButton("Delete", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
               dbcon=new SQLController(activity);
                dbcon.open();
                Cursor c=dbcon.returnData();
                if(c.moveToFirst())
                {
                    do{
                        if(children.equals(c.getString(0))){
                            dbcon.deleteData(children);
                            notifyDataSetChanged();
                            Toast.makeText(activity,"Successfully Deleted",Toast.LENGTH_LONG).show();
                            break;
                        }
                    }while(c.moveToNext());
                }
                dbcon.close();
            }
        }).show();
        return false;
    }
});
return convertView;
}

這是我的可擴展列表適配器的getChildView方法，我正在使用Sqlite數據庫，並且將數據存儲到數據庫中，並且還需要刪除一些項目，因此當我長時間單擊要刪除的項目時，我使用onLongClickListener來刪除項目刪除按鈕，當我單擊該按鈕時，已從數據庫中刪除該項目，但該項目仍顯示在該活動中，直到我重新打開該應用程序為止。我想要的是，當我單擊刪除按鈕時，它也應立即從該列表中消失，謝謝預先，

Answer 1

您需要更新視圖的適配器。 大多數適配器都具有notifyDataSetChanged()方法，該方法會更新其顯示的數據集