am getting error in this class MainActivity.java #1
Description
caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Switch.setChecked(boolean)' on a null object reference.
{{ message }}
caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Switch.setChecked(boolean)' on a null object reference.