How to Hide keyboard when activity starts

in your onCreate() use this..

this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);

Add this two line in your activity's XML file in the RootLayout i.e. either relative or linear(whatever you have taken) :

android:focusableInTouchMode="true" 

Add this line in activity manifests file

 android:windowSoftInputMode="stateHidden"