You can set the background image to an activity by setting android:background xml attributes as followings: (Here, for example, Take a LinearLayout for an activity and setting a background image for the layout(i.e. indirectly to an activity)).
Mobdro is 100% legal in USA. You donât need to worry about it. Up to now, there is no legal issues regarding Mobdro application. Mobdro streaming application is quite familiar to UK and US people.
SolarMovie is legal as it is running 'in accordance with copyright law' although people who reproduce or distribute any or the works will be in violation of this law. See the related link for further information. + 48 others found this useful.