android get sdk version

if(android.os.Build.VERSION.SDK_INT ==  android.os.Build.VERSION_CODES.LOLLIPOP){
	// Code For Android Version higher equal to LOLLIPOP(21)
} else if(android.os.Build.VERSION.SDK_INT > 21){
	// Code For Android Version higher than LOLLIPOP(21)
} else{
	// Code For Android Version lower than LOLLIPOP(21)
}