When I tried to enable wifi tethering from the following code it throws the exception
java.lang.reflect.InvocationTargetException at java.lang.reflect.Method
Guys I tried everything and I wasn't able to start the hotspot in Android 6.0. You can just check if Api is >= 23, and if so just take the user to settings page to create hotspot by himself.
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
final Intent intent = new Intent(Intent.ACTION_MAIN, null);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
final ComponentName cn = new ComponentName(
"com.android.settings",
"com.android.settings.TetherSettings");
intent.setComponent(cn);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity( intent);
}else{
createhotSpot();
}