@Nezz is correct, this will likely be the quickest method on Android. However, it is likely that you are loading a lot of content when you first start your game.
A good multiplatform approach is to create a screen management class, similar to the XNA code example offered by microsoft.
A system like that one allows you to only load content that will be needed immediately in the next screen.
So, for instance:
- start the game with a splash screen, which only loads a single graphic.
- while the splash screen is displaying, load content for your next screen (menu?)
- then, from your menu and all other screens that follow, you load only the next screen needed (maybe scores, maybe gameplay)
This is what I do in my game Tap Ski Extreme, and you will notice it boots up very quickly.
Another reason why this system is good, is that it allows you to dump content that is no longer needed, and free up memory. Example: after showing the splash screen, it is unlikely you want to display your logo or graphic again, so there is no need to keep it loaded