Hide application icon

Question

I am doing an Android application. I want to hide the application icon in the emulator and I want to start my application by pressing some numbers, for instance 456#. Is the

Answer 1

Note that the solution:

PackageManager pm = getApplicationContext().getPackageManager(); 
pm.setComponentEnabledSetting(getComponentName(), PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);

will make the app NOT upgradeable from google play as the OS will not find the package after this component disabling and will not able to re-install it, unless the app is not manullay uninstalled (which is not a user friendly behaviour)