Have you tried AnySoftKeyboard on android? It's open source and fully customizable with different layouts and allows you to switch between different entry meth

Have you tried AnySoftKeyboard on android? It's open source and fully customizable with different layouts and allows you to switch between different entry methods with a swipe or button press. I've got a QWERTY layout, both regular and one with extra keys for terminals, a full number layout and a keypad layout all easily switchable. It also has what's surprisingly become one of my favourite features, left and right arrows at the top. It helps so much with text navigation, especially when writing long blocks of text.