Question

如何在列表适配器上删除项目后刷新片段列表？

这是我的适配器代码： https://pastebin.com/rGhV3fXj

builder.setPositiveButton("YES",
                    new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog,
                                            int which) {
                            if(pos!=1){
                                sqLiteDatabase.execSQL("DELETE FROM BmiPersons where id = "+pos );
                                Toast.makeText(getContext(),"Delete Success !",Toast.LENGTH_SHORT).show();                                  ListDataAdapter.this.notifyDataSetChanged();

                            }else {
                                Toast.makeText(getContext(),"You Can't delete initial data. ",Toast.LENGTH_SHORT).show();
                            }

这是我的片段代码： https://pastebin.com/hcPDKtVA

public void updatePersonList(){
    mBmiList.clear();
    dbHelper = new DatabaseHelper(getContext());
    sqLiteDatabase = dbHelper.getReadableDatabase();
    cursor = dbHelper.getBmiInformation();
    if (cursor.moveToFirst()){
        do{
            list_id = cursor.getInt(cursor.getColumnIndex(DatabaseHelper.COLUMN_ID));
            list_date = cursor.getString(cursor.getColumnIndex(DatabaseHelper.COLUMN_DATE));
            list_age = cursor.getString(cursor.getColumnIndex(DatabaseHelper.COLUMN_AGE));
            list_result = Float.parseFloat(cursor.getString(cursor.getColumnIndex(DatabaseHelper.COLUMN_RESULT)));

            DataProvider dataProvider = new DataProvider(list_id,list_date,list_age,list_result);
            mBmiList.add(dataProvider);
        }while (cursor.moveToNext());
    }
    mListDataAdapter.notifyDataSetChanged();
}

Answer 1

您必须删除mBmiList中使用的mListDataAdapter数据，然后调用mListDataAdapter.notifyDataSetChanged();

删除列表项后，从列表适配器刷新片段

1 个答案: