It is also requires all those empty methods in this example. The OnKeyboardActionListener listens for keyboard input.Public class MyInputMethodService extends InputMethodService implements KeyboardView.OnKeyboardActionListener View onCreateInputView() It handles input received from the keyboard and sends it on to whatever view is receiving it (an EditText, for example). Add the Java code to handle key inputĬreate a new Java file. I am just including a minimal version here. This file tells the system the input method subtypes that are available. isRepeatable: If you hold down the key it will keep repeating the input.keyEdgeFlags: This indicates which edge the key should be aligned to.keyLabel: This is the text that is displayed on the key.See keyOutputText if you want to input a longer Unicode string. codes: This can be a Unicode or custom code value that determines what happens or what is input when the key is pressed.Even if you set it to 0px there is still a small gap. Gap: The horizontal and vertical gap tells how much space to leave between keys.keyHeight: It is hard coded here, but you could use something like to set it dynamically for different screen sizes.It can be overridden by individual keys, though, as you can see happened with the Delete and Enter keys in the third row. The 20%p means that each key should take up 20% of the width of the parent. keyWidth: This is the default width of each key.This Keyboard defines the layout of the keys.

This is where it starts to get more interesting. (Right click the xml folder and choose New > XML resource file.) Then add the following two xml files to it. (Right click res and choose New > Directory.) For that you should check out the Candidates view. It just shows what key you are pressing (in case your big, fat fingers are covering it). The key preview is a layout that pops up when you press a keyboard key. In this example there is only one keyboard, but you could add other keyboards and swap them in and out of this KeyboardView. This view is like a container that will hold our keyboard. I will just leave the MainActivity and 'Hello World!' layout as it is.Īdd the following two files to your app's res/layout folder: If there are other features that you need, I provided links to more help at the end. As much as possible I tried to remove any unnecessary code. The following steps show how to create a working custom system keyboard. You can modify it for any keyboard layout. If you want to make a keyboard that will only be used within your own app, then see my other answer. This answer tells how to make a custom system keyboard that can be used in any app that a user has installed on their phone.

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