如果用户在警报对话框中按下“是”按钮，如何在列表中添加项目，如果他按下“否”则不添加

Question

I am making an app in which if a user selects a submenu item I pop up an Alert dialog which asks his confirmation whether he wishes to save that item in his list and saves it if he presses yes and doesn't add it if he presses no.

Answer 1

You can use this to show alert:

AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage("Are you sure to do this?").setCancelable(false).setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    doSomeThing();
                                            dialog.cancel();
                }
            }).setNegativeButton("No", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    dialog.cancel();
                }
            });
    AlertDialog alert = builder.create();
    alert.show();

Answer 2

You add the element you get from the dialog to the ArrayList you use to feed your Adapter then feed the cursor = new yourAdapter(YourClass.this.getBaseContext(), android.R.layout.simple_list_item_1, dataList);

Call cursor.notifyDataSetChanged(); which tells the list to repopulate with the new data;