Starting an alternate activity on startup if certain conditions satisfy

Question

I am creating an app that requires some settings to be set first before starting the display activity. I would like the app to check if a preference file (that contains these settings) exists and if it does exist move to a particular activity or remain in the main activity(as the settings activity is my main activity).
I tried to use startactivty() on startup, but it shows the settings menu for a fraction of a second before moving on to the display activity.

how should I do it?

I tried the following code:

    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);          
        SharedPreferences prefsfile = getSharedPreferences("myfile",0); 

        if( prefsfile!=null & Timetablledisplay.flag==0){
            Intent i=new Intent(ProjectBunkitActivity.this,Timetablledisplay.class);
            startActivity(i);
        }

Have you tried adding the `finish()` tag after you call `startActivity(i)` to close your current activity? — gkiar, Jun 26 '12 at 13:07
the code is working well but I need the Timetabledisplay activity to start without showing the settings activity — jaisonDavis, Jun 26 '12 at 13:10

score 2 · Answer 1 · answered Jun 26 '12 at 13:26

You should have the LAUNCHER Activity call startActivity() on the new Activity (plus finish()) in onCreate() before calling setContentView() when needed. This way, the new Activity will be launched "behind the scenes" before an attempt at inflating any layout is made.

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    SharedPreferences prefs = getSharedPreferences("myFile", 0); 

    if(prefs != null && ActivityOne.flag == 0) {
        Intent i = new Intent(this, ActivityOne.class);
        startActivity(i);
    } else {
        Intent i = new Intent(this, ActivityTwo.class);
        startActivity(i);
    }

    finish();
}

gkiar · Accepted Answer · 2012-06-26T13:29:58.280

1

An option for a potential workaround for this problem would be taking a slightly different approach:

Instead of launching into Settings, and then deciding whether or not to go to the Timetablleddisplay activity, you could start in a blank activity that simply decides which activity to launch.

The activity could be something like this:

super.onCreate(savedInstanceState);      
    SharedPreferences prefsfile = getSharedPreferences("myfile",0); 

    if( prefsfile!=null && Timetablledisplay.flag==0){
        Intent i=new Intent(CURRENT.this,Timetablledisplay.class);
        startActivity(i);
        finish();
    }
    else
    {
        Intent i=new Intent(CURRENT.this,ProjectBunkitActivity.class);
        startActivity(i);
        finish();
    }

edited Jun 26 '12 at 13:29

answered Jun 26 '12 at 13:17

gkiar

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@iKiar, why do you need to call `setContentView` here? – Alex Lockwood Jun 26 '12 at 13:29
Thanks for pointing it out, I just copied the OPs code from above and forgot to remove it. – gkiar Jun 26 '12 at 13:29
I'm glad. Don't forget to accept the answers that work for you! – gkiar Jun 29 '12 at 18:51

Starting an alternate activity on startup if certain conditions satisfy

2 Answers2