Android version check

Try this one

 if (Build.VERSION.SDK_INT > Build.VERSION_CODES.LOLLIPOP_MR1) {
       // Marshmallow+
   }else{
        //below Marshmallow
}

Note: Build.VERSION_CODES.LOLLIPOP_MR1==22

    Build.VERSION_CODES.M==23

Well in that case use this

// Check if we're running on Android 5.0 or higher
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    // Call some material design APIs here
} else {
    // Implement this feature without material design
}

Build.VERSION_CODES.LOLLIPOP = 21

Well, you must compile your project with the latest SDK version. Your constants are replaced with corresponding integer values during compilation. No matter what version of Android you run the application on - integers are the same