I read several other posts and using input.setInputType(TYPE_NUMBER_FLAG_DECIMAL); does open the keyboard but its not the numeric keyboard
add android:inputType="number" to your edittext in your xml, it will automatically open numeric keyboard when you will click inside edittext.
Just you this code for your xml file,
android:inputType="number"
chinben
Add android:inputType="number"
in xml will automatically open numeric keyboard when click on EditText, but this will allow you to enter characters only numbers, and if you wanna enter other characters, you may try this:
android:inputType="number"
android:digits="0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
来源:https://stackoverflow.com/questions/13839333/how-to-open-numeric-keyboard-when-click-on-edittext