Android : How to view custom softkeyboard while tap on EditText in android?

I want to show softkeyboard after tapping on EditText in my custom Softkeyboard.

I have made one custom keyboard in which I've added one key.

This key will navigate you to a Conversion View which contains an EditText. So after tapping on that EditText I want to open my own custom softkeyboard.

Please reply me as soon as possible.