17

When creating your own SoftKeyboard you are given a "key preview" by default.

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How do you disable this?

Edit:

You can customise the keyPreview layout by changing the <KeyboardView> attribute android:keyPreviewLayout. This is styled by default to look at keyboard_key_preview.xml:

Edit 2: Following my be a red herring:

The source code suggests supplying 0 or not applying the tag android:keyPreviewLayout will result in no key preview appearing:

    ...
    case com.android.internal.R.styleable.KeyboardView_keyPreviewLayout:
        previewLayout = a.getResourceId(attr, 0);
        break; 
    ...
    if (previewLayout != 0) {
        mPreviewText = (TextView) inflate.inflate(previewLayout, null);
        mPreviewTextSizeLarge = (int) mPreviewText.getTextSize();
        mPreviewPopup.setContentView(mPreviewText);
        mPreviewPopup.setBackgroundDrawable(null);
    } else {
        mShowPreview = false;
    }

I've tried:

  • A styled KeyboardView with no keyPreviewLayout (Strangely though replacing this value changed the style of the preview.)
  • I made a keyPreviewLayout reference an id with a value of 0 (which causes a crash on inflation).

Stumped. :( Any help would be greatly appreciated!

Graeme
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4 Answers4

17

There's a method:

public void setPreviewEnabled(boolean previewEnabled)

But I don't know which version of the API that starts at.

Reno
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Rob Myers
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  • This is implemented on the KeyboardView Object. See the javadoc https://developer.android.com/reference/android/inputmethodservice – fishjd Mar 31 '17 at 19:28
1

Another way - add to xml
android:keyPreviewLayout="@null"

<android.inputmethodservice.KeyboardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/keyboard"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:keyPreviewLayout="@null"
    android:visibility="gone"
    />
Yuliia Ashomok
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0

If you want to handle Preview for Particular Keys means handle it inside onPress Method.

override fun onPress(primaryCode: Int) {
    handleKeyPreviews(primaryCode)
}

private fun handleKeyPreviews(code: Int) {
    when (code) {
        Keyboard.KEYCODE_DELETE, Keyboard.KEYCODE_SHIFT, Keyboard.KEYCODE_DONE, 32 ->
            keyboardView?.isPreviewEnabled = false
        else ->
            keyboardView?.isPreviewEnabled = true
    }
}
Vivek
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  • Hey Graeme, Could you please help me to sort out this issue https://stackoverflow.com/questions/53959115/in-android-custom-keyboard-how-to-change-alphabets-keyboard-to-symbols-keyboard – Vivek Dec 29 '18 at 20:11
0

Have you tried this:

public static mEmptyView;

//somewhere where you have the context:
mEmptyView = new View(context);

@Override public View onCreateCandidatesView() {
    return mEmptyView;
}

This basically will always return an empty view, when the candidates should show up.

Franziskus Karsunke
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  • This stops the entire soft keyboard appearing. I have been returning `null` as standard: [InputMethodService.onCreateCandidatesView()](http://developer.android.com/reference/android/inputmethodservice/InputMethodService.html#onCreateCandidatesView()) – Graeme Oct 18 '11 at 11:19
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    Also, it's generally recommended you never keep View's as static members of a class as a view will keep a reference to his ancestors and can quite quickly build up memory leaks. – Graeme Oct 18 '11 at 13:31
  • Yep it is better to create one in the method... I thought of that too. The garbage collector has more to do then, but better more garbage collection than memory leaks^^ – Franziskus Karsunke Oct 18 '11 at 15:45