NumberPicker in AlertDialog always activates keyboard. How to disable this?

Question

To all,

I am trying to get a simple NumberPicker to work in a AlertDialog. The problem is that whenever I increase/decrease the value in the numberpicker, the keyboard activates.

There are many posts describing this problem, but none of the suggestions work. I have tried:

android:configChanges="keyboard|keyboardHidden"

And

inputManager.hideSoftInputFromWindow(currentView.getWindowToken(), 0);

And

getWindow().setSoftInputMode(
     WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);

I have tried calling these functions before and after initialization (dialog.show ()), on keypress events (using listeners obviously), etc. but no luck so far.

The complete code:

popup.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" >
    <NumberPicker
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/myNumber"
        android:configChanges="keyboard|keyboardHidden"   
    />
</RelativeLayout>

And the calling function:

AlertDialog.Builder builder =  new AlertDialog.Builder(this);
builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int which) {
        return;
    } }); 
builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int which) {
        return;
    } }); 
View view = getLayoutInflater().inflate(R.layout.popup, null);
builder.setView (view);

final AlertDialog dialog = builder.create ();
NumberPicker picker = (NumberPicker) view.findViewById(R.id.myNumber);
picker.setMinValue(0);
picker.setMaxValue(999);

dialog.getWindow().
    setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
dialog.show();      

Any help appreciated

Barry

Answer 1

Actually, although the solution above works perfectly, there is an easier way.

picker.setDescendantFocusability(NumberPicker.FOCUS_BLOCK_DESCENDANTS);

This is all that is needed. Anyway, thanks for the replies!!!! :-)

Answer 2

Since there is no access to NumberPicker buttons, it's "impossible" to do.

I made fast dirty hack to deal with it.

First add focus eater to layout, in this case Button with 0 size:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" >
    <NumberPicker
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/myNumber"
        android:configChanges="keyboard|keyboardHidden"
        />
    <Button
        android:id="@+id/myBtn"
        android:layout_width="0dp"
        android:layout_height="0dp"
        />
</RelativeLayout>

We need to catch event of clicking on incement/decrement buttons, I chose OnValueChangedListener, couldn't find something better.

    EditText edit = null;
    try {
        final Field[] fields = picker.getClass().getDeclaredFields();
        for (Field f : fields) {
            if (EditText.class.equals(f.getType())) {
                f.setAccessible(true);
                edit = (EditText) f.get(picker);
            }
        }
    } catch (IllegalAccessException e) {
        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    }
    if (edit != null) {
        final EditText finalEdit = edit;
        final InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        picker.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
            @Override
            public void onValueChange(NumberPicker numberPicker, int i, int i1) {
                dialog.findViewById(R.id.myBtn).requestFocusFromTouch();
                imm.hideSoftInputFromWindow(finalEdit.getWindowToken(), 0);
            }
        });
    }

This is not recommended solution. I hope someone would find something better. Use only for educational purpose ;-)

Answer 3

the android:configChanges attribute belongs in your Manifest.xml file, not the layout. But if you are hiding the keyboard from there, you are probably best of using

android:windowSoftInputMode="stateAlwaysHidden"

You should also try to use getWindow() on your Activity rather than just the Dialog and see if that helps. This is probably the best solution as the first one (hiding from the manifest) will keep the keyboard hidden throughout the entire Activity.