android:black screen switching between activity

Question

Hi, I am using below code from one of my activity to start another

Intent viewIntent = new Intent (getApplicationContext (), landingPage.class);
 Bundle b = new Bundle ();
 b.putString ("ApplicationName", a_Bean.getApplicationName ());
 if (landingPage.getInstanceCount () < 1)
  bp.landingPage_ProgressDialog = ProgressDialog.show (ViewAllApp.this, "Please wait...", "Retrieving data...", true, false);
 viewIntent.putExtras (b);
 viewIntent.addFlags (Intent.FLAG_ACTIVITY_CLEAR_TOP);
 startActivityForResult (viewIntent,10);
 Thread background=new Thread(new Runnable() {
  public void run() {
  Progresshandler.sendMessage(handler.obtainMessage());//finishes progressDialog
  }});
 background.start ();

but after startactivity it shows a black screen & then displays new activity. Can I make progressdialog to be shown while the black screen is displayed??

Answer 1

Your code is a bit confusing and unclear. Please specify the goal. Anyway, some things I see:

1- Do not use getApplicationContext(), an Activity is a Context itself, thus it's better to use:

new Intent (this, landingPage.class);

2- You don't need to create a Bundle to add a string to to an intent.

viewIntent.addExtra("ApplicationName", a_Bean.getApplicationName ());

Anyway, passing around your activities the application's name seems like a horrible idea to me. If you really need the application's name throughout the activities, create an Application class as the central point of your application. I really recommend you to revisit your architecture.

3- Are you sure you want to access the activity landingPage from its father? I assume that landingPage is instantiated somewhere. I find this to be a terrible approach. If I am wrong, please provide examples.

As for the rest of the code and your precise question, I can't answer it, I haven't worked with Progress dialogs, but we don't even know what the "bp" variable is and, as I said, you should try to ask again your question clarifying some points.

Answer 2

Hi StackOverflow, I resolved above issue by removing DataLoader(i.e. methods that load data from Internet) from called class(i.e. my landingPage.class) to the caller class.