使用先前选择的值启动数字选择器

Question

我使用alert dailog作为数字选择器，我可以选择值并将其设置为我的textview，但我正在尝试的是，如果我从数字选择器中选择假设5，那么它将设置为textview并再次设置我点击textview然后5必须聚焦或选择numberpicker

 public void qtyshow()
    {

        final AlertDialog.Builder alert = new AlertDialog.Builder(ProductView.this);

        alert.setTitle("Select the Qty: ");

        final NumberPicker np = new NumberPicker(ProductView.this);


        np.setMaxValue(20); // max value 20
        np.setMinValue(1);   // min value 0
        np.setWrapSelectorWheel(false);

        alert.setView(np);


        alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {

                proqty.setText(String.valueOf(np.getValue())); //set the value to textview
                // Do something with value!



                Float mulprice=Float.parseFloat(packlist.get(0).getProductPack_SP());
                int mulqty= np.getValue();

                Float total=mulprice*mulqty;
                packsp.setText("$" + String.format("%.2f%n", total));
                System.out.println("price test" + packlist.get(0).getProductPack_SP() + "," + mulprice + "," + mulqty + "," + String.format("%.2f%n", total));
                Float mulelseprice=Float.parseFloat(packlist.get(0).getProductPack_ElseWhere());
                Float totalelse=mulelseprice*mulqty;

                packelsewhere.setText("$" + String.format("%.2f%n", totalelse));
            }
        });

        alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
                // Cancel.

            }
        });

        alert.show();


    }

Answer 1

你可以这样做：

mNumberPicker.setValue(number);