Android Numberpicker default value not coming

Question

When the numberpicker is loaded, the default value is not appearing on the screen until touched.

Once touched, everything works fine.Any help appreciated.

Also if the formatter is removed, it works fine.

enter image description here

dialog.xml

<NumberPicker
    android:id="@+id/number_picker"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
     />

<Button
    android:id="@+id/apply_button"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_below="@+id/number_picker"
    android:text="@string/ok_string" />

Here is the activity code:

final NumberPicker np = (NumberPicker) d.findViewById(R.id.number_picker);
        np.setMaxValue(50);
        np.setMinValue(0);
        np.setWrapSelectorWheel(true);
        np.setOnValueChangedListener(this);
        np.setDescendantFocusability(NumberPicker.FOCUS_BLOCK_DESCENDANTS);

        np.setFormatter(new NumberPicker.Formatter() {
            @Override
            public String format(int i) {
                if (i == 25)
                    return "0";
                else
                    return String.valueOf(i - 25);
            }
        });
        np.setValue(25);

Thanks in advance

Could it be that the initial text color matches the background color? Hard to visualize what you are seeing without a device. — stkent, Dec 07 '14 at 14:51
Possible duplicate of [Android NumberPicker with Formatter does not format on first rendering](https://stackoverflow.com/questions/17708325/android-numberpicker-with-formatter-does-not-format-on-first-rendering) — Sebastian, Jul 14 '17 at 09:31

score 7 · Answer 1 · answered Jun 16 '15 at 05:40

7

@Renjith

Thank for the link, but I think you should link the code or even paste it here. https://code.google.com/p/android/issues/detail?id=35482#c9

Field f = NumberPicker.class.getDeclaredField("mInputText");
f.setAccessible(true);
EditText inputText = f.get(mPicker);
inputText.setFilters(new InputFilter[0]);

answered Jun 16 '15 at 05:40

min

953
1
11
23

Kotlin version below: https://stackoverflow.com/a/59704146/3451975 – Jeehut Jan 12 '20 at 13:14

score 6 · Accepted Answer · answered Dec 08 '14 at 05:49

6

The issue seems to a bug in NumberPicker widget.

And I have solved it using method 2 described here.

answered Dec 08 '14 at 05:49

Renjith

3,274
19
39

score 3 · Answer 3 · answered Jul 06 '17 at 12:51

3

I found a solution for this bug in NumberPicker that works in APIs 18-26 without using reflection and without using setDisplayedValues() here.

answered Jul 06 '17 at 12:51

Sebastian

2,896
23
36

score 3 · Answer 4 · answered Jan 12 '20 at 13:11

Here's the accepted answer written in Kotlin in a single line:

// NOTE: workaround for a bug that rendered the selected value wrong until user scrolled, see also: https://stackoverflow.com/q/27343772/3451975
(NumberPicker::class.java.getDeclaredField("mInputText").apply { isAccessible = true }.get(this) as EditText).filters = emptyArray()

Note that I recommend to keep the comment line to document why this code is needed.

score 1 · Answer 5 · answered Feb 01 '18 at 15:00

I had the same problem and I was using NumberPicker with Strings. My problem was that after the activity was opened with a transition the the default value in the number picker was invisible, even though i was setting the picker values with picker.setDisplayedValues(list.toStringsArray())

So for me the solution was the following:

private void populatePicker(NumberPicker picker, String[] strings, int index) {
    picker.setDisplayedValues(null);
    picker.setMinValue(0);
    picker.setMaxValue(strings.length - 1);
    picker.setDisplayedValues(strings);
    picker.setValue(index);

    try {
        Field field = NumberPicker.class.getDeclaredField("mInputText");
        field.setAccessible(true);
        EditText inputText = (EditText) field.get(picker);
        inputText.setVisibility(View.INVISIBLE);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

score 0 · Answer 6 · answered Jan 31 '20 at 17:24

0

Try

np.setWrapSelectorWheel(false);

answered Jan 31 '20 at 17:24

Paolo

43
2

Can you expand on why this is perhaps better than the accepted answer? – stdunbar Jan 31 '20 at 17:49

Android Numberpicker default value not coming

6 Answers6

Linked