Question

I am working on an application which contain register activity as it’s first page which is on tabs. i want that once the user is register then whenever the user starts the application it should always run from main menu screen and should never display the register screen till the user uninstall the application and reinstall it again.

Answer 1

you can use SharedPreferences. This is an example:

SharedPreferences mPrefs = getSharedPreferences("MyPreferences", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = mPrefs.edit();
editor.putBoolean("firstTime", true);
editor.commit();

So you can check if firstTime is true doing this:

SharedPreferences mPrefs = getSharedPreferences("MyPreferences", Context.MODE_PRIVATE);
if(mPrefs.getBoolean(firstTime, false){
    //show screen
}