Determine if Android app is being used for the first time

Question

I am currently developing an android app. I need to do something when the app is launched for the first time, i.e. the code only runs on the first time the program is launch

Answer 1

I like to have an "update count" in my shared preferences. If it's not there (or default zero value) then this is my app's "first use".

private static final int UPDATE_COUNT = 1;    // Increment this on major change
...
if (sp.getInt("updateCount", 0) == 0) {
    // first use
} else if (sp.getInt("updateCount", 0) < UPDATE_COUNT) {
    // Pop up dialog telling user about new features
}
...
sp.edit().putInt("updateCount", UPDATE_COUNT);

So now, whenever there's an update to the app that users should know about, I increment UPDATE_COUNT