Android KeyBoard.Key disable iconPreview of special keys?

Question

I customize my own soft keyboard by implementing the KeyboardView.OnKeyboardActionListener interface.

When the keys are pressed, it will show a preview popup.

My problem is how to disable the preview popup for special keys such as SHIFT and DELETE?

I have tried to set the android:iconPreview attribute to null but it didn't work.

<Key
    android:codes="-1"
    android:keyIcon="@drawable/key_shift" 
    android:keyWidth="15%p"
    android:isModifier="true"
    android:isSticky="true"
    android:keyEdgeFlags="left" />

Have any idea?

Thanks in advance!

Answer 1

First you must implement OnKeyboardActionListener

then use onPress() and onRelease() to control the preview popup like this:

public void onPress(int primaryCode) {
    if (primaryCode==-2||primaryCode==-5||primaryCode==-4){
        mInputView.setPreviewEnabled(false);
    }
}

public void onRelease(int primaryCode) {
    mInputView.setPreviewEnabled(true);
}