Android custom keyboard layout leaving a margin of white at the side

Question

I\'m working on a custom keyboard for Android, and I\'ve run in to an issue where the keyboard seems to leave a white line/space at right, instead of filling the parent view...

Answer 1

I cannot reproduce the error, I have provided a screenshot, with a light background app and all my relevant code. I am not sure exactly where you are going wrong without seeing the whole project and directories, so I've posted the relevant xml. There is a service class also, I haven't included (as you obviously have it working).

The code is in a file called qwerty.xml in the resources/xml folder, with a file called method.xml:

I used all your keyboard dimensions in the qwerty.xml, except I replaced the image.

method.xml

Two layout files:

keyboard.xml

preview.xml

Styles:

In the manifest, within application:

I've left the image so large so you can clearly see there is no gap.

This link here also steps through this code:

http://code.tutsplus.com/tutorials/create-a-custom-keyboard-on-android--cms-22615

edit 1

After discussion in the comments, I would suggest checking your background style as there are issues/changes with the default background color may be showing for the keyboard window. This is addressed in detail issue in this answer https://stackoverflow.com/a/33052648/3956566. I won't reiterate the details, as the link is unlikely to rot, being an upvoted SO post.

edit 2

Ok Adding the difference in the input method service:

@Override
public void onKey(int primaryCode, int[] keyCodes) {
    InputConnection ic = getCurrentInputConnection();

    switch(primaryCode){
        case Keyboard.KEYCODE_DELETE :
            ic.deleteSurroundingText(1, 0);
            break;
        case Keyboard.KEYCODE_SHIFT:
            caps = !caps;
            keyboard.setShifted(caps);
            kv.invalidateAllKeys();
            break;
        case Keyboard.KEYCODE_DONE:
            ic.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_ENTER));
            break;
        default:
            char code = (char)primaryCode;
            if(Character.isLetter(code) && caps){
                code = Character.toUpperCase(code);
            }
            ic.commitText(String.valueOf(code),1);
    }
}

edit 3

Create a blank project, no activity for your keyboard, to test and run it as a separate app. You are using android:theme="@style/AppTheme.NoActionBar" In your launcher activity and there may be an issue with background opacity and your windows/views.