Hi guys, I'm still working on my app, first i'll explain what it does and then what i want it to do.

When the app is started, it shows a splash screen with a button, after this button is clicked the user gets a view with 3 tabs, at the moment only the first tab has content, and the selected tab is the first tab which shows a listview with RSS news articles. When a user clicks on the article they will be sent to the corresponding url.
However, when the user has read enough, and wants close the app, I assume they close it by hitting the hardware back button. It then hides the app since I set up the splash screen to finish itself after being displayed.

Now the problem, when the user starts the app again, the splashscreen is displayed again, this i do not want, unless the app has actually been killed, it should just show the tabs view.

Another problem i run into when the app is started for the second time (or resumed, i don't know which it does), is that when the splashscreen button is pressed for the second time it force closes the app because it starts parsing the RSS for a second time giving me arrayoutofbounds errors. It should either memorize the complete listview with rss items, or it should reset completely to be able to parse it again.


my set up is as follows:

splashactivity shows,
Tabacitivty shows RSSactivity in the first tab.
RSSactivity starts RSSreader and RSShandler to parse an rss feed and build a listview.


Any help on how to set up the onStop onStart onRestart onResume onPause etc methods would be greatly appreciated.


(All i have set up now is onCreate methods and an onStop method in the splashactivity which only does finish())

Hi Kalder,

Making progress.

About the first question. You need to put something like this in your code to return to (actually restart the) home screen.

Code: Select all

               Intent startMain = new Intent(Intent.ACTION_MAIN);
                startMain.addCategory(Intent.CATEGORY_HOME);
                startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                startActivity(startMain);


When you call finish in an activity it removes itself from the activity stack. If its at the top of the stack, it ends the app. Since your splash screen ends itself, that leaves your main activity for the reader on the top of the stack. This code leaves it there and starts the home screen for you to choose other apps from. You must intercept the back key to run this code instead. Question then is, how do you end the program so the splash screen can start and reread the feed? Probably need a special button to restart the app with an intent and then finish this one.

Whenever you change tabs, the current tab activity is paused. When you return, it is resumed. Put anything that needs fixed after a pause in the resume not in the oncreate. The easiest way to see how your app behaves is to put plenty of Log statements in there at all the points you want to track, like oncreate, pause, resume and any of those other ones you might be using. Then you can see the sequence during these state changes. Also, if you are using the application global variables you need to handle saving them yourself since the activity manager does not help you do this. Be aware though that while your app is running this should not be a concern. This will only happen when the OS needs the memory very badly and almost kills your app completely.

Hope this helps.

Phyll

in the tabactivity, i added:

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@Override
   public void onBackPressed() {
      // TODO Auto-generated method stub
      super.onBackPressed();
      Log.d("Back Pressed?", "Yes");
      Intent startMain = new Intent(Intent.ACTION_MAIN);
        startMain.addCategory(Intent.CATEGORY_HOME);
        startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(startMain);
   }

however, when i press the back button, my log message doesn't show, so it does not start the new intent, seems like it bypasses onBackPressed() although it shouldn't.

I'm going to post the contents of the splash activity, tabsactivity and rssactivity, it will make helping me easier i guess

Splash Activity:


TabsActivity:


RssActivity:

Hi Kalder,

Code: Select all

    @Override
    public void onBackPressed() {

       //TODO: Task goes here. No task will ignore back button

        return;
        }//onbackpressed


Don't use the super, espcially before what you really want to do. I'll look at the rest of you code.

Phyll

Instead of placing this in the TabActivity:

Kalder wrote:

Code: Select all

@Override
   public void onBackPressed() {
      // TODO Auto-generated method stub
      super.onBackPressed();
      Log.d("Back Pressed?", "Yes");
      Intent startMain = new Intent(Intent.ACTION_MAIN);
        startMain.addCategory(Intent.CATEGORY_HOME);
        startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(startMain);
   }

I placed this in the RssActivity:

Code: Select all

@Override
   public void onBackPressed() {
      // TODO Auto-generated method stub
      Log.d("Back Pressed?", "Yes");
      Intent startMain = new Intent(Intent.ACTION_MAIN);
        startMain.addCategory(Intent.CATEGORY_HOME);
        startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(startMain);
        return;
   }

And now it works

Thanks for that piece of code Phyll! It's exactly what i was looking for.
Now I will try to make a menu that allows the user to really close the app