Question

所以我遇到一个小问题，我的代码会从ListView中删除ListView行，但每次我杀死应用程序然后重新打开它时，“已删除”行会再次填充ListView。

这是DatabaseHelper类中delete方法的代码：

 public void obrisiTrening(int id){
        SQLiteDatabase db = this.getWritableDatabase();
        db.delete(DBKonstante.TABLE_NAME, DBKonstante.KEY_ID + "=?", new String[]{String.valueOf(id)});
        db.close();

这是我从数据库中删除ListView行和记录的代码：

  rec_WorkoutItemsList.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
        @Override
        public boolean onItemLongClick(AdapterView<?> adapterView, View view, final int i, long l) {


            final Dialog dialog = new Dialog(MainActivity.this);
            dialog.setContentView(R.layout.dialog_delete);

            final TextView tvDialogDelete = (TextView) dialog.findViewById(R.id.tvDialogDelete);

            tvDialogDelete.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    final DBPodatci infoData = dbPodatci.get(i);
                    dba = new DBHandler(MainActivity.this);
                    int position = dbPodatci.indexOf(infoData);
                    dbPodatci.remove(position);

                    DBPodatci podatki = new DBPodatci();
                    final int idToDelete = podatki.getItemId();

                    dba.obrisiTrening(idToDelete);
                    dba = new DBHandler(MainActivity.this);
                    dba.obrisiTrening(i);

                    rec_WorkoutItemsList.setAdapter(vjezbaAdapter);
                    vjezbaAdapter.notifyDataSetChanged();
                    dialog.dismiss();

                }
            });
            dialog.show();

            return false;
        }
    });

DB PODATCI

public class DBPodatci {
    public String odabraneVjezbe, recordDate;
    public int itemId;

    public String getOdabraneVjezbe() {
        return odabraneVjezbe;
    }

    public void setOdabraneVjezbe(String odabraneVjezbe) {
        this.odabraneVjezbe = odabraneVjezbe;
    }

    public String getRecordDate() {
        return recordDate;
    }

    public void setRecordDate(String recordDate) {

    this.recordDate = recordDate;
}

public int getItemId() {
    return itemId;
}

public void setItemId(int itemId) {
    this.itemId = itemId;
}

}

Answer 1

不确定这是做什么的。

dba.obrisiTrening(idToDelete);
dba = new DBHandler(MainActivity.this);
dba.obrisiTrening(i);

你只需要这个

   final TextView tvDialogDelete = (TextView) dialog.findViewById(R.id.tvDialogDelete);

    final DBHandler dba = new DBHandler(MainActivity.this);

        tvDialogDelete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                final DBPodatci infoData = dbPodatci.get(i);
                final int idToDelete = infoData.getItemId();

                dbPodatci.remove(i);  
                dba.obrisiTrening(idToDelete);

                vjezbaAdapter.notifyDataSetChanged();
                dialog.dismiss();

注意：你不应该使用Arraylist＆amp; ArrayAdapter here ...您正在使用数据库，因此CursorAdapter就是您想要的

Android - 从ListView中删除项目但不从数据库

1 个答案: