如何刷新屏幕或在后台运行初始过程

Question

My main screen has a process which can take 20-30 seconds to load the information on to the screen. While this is happening the screen is just black. I have tried using a ProgressDialog to let the user know the process is running but as the screen is black you cannot see it. Can I refresh the screen so that the dialog is visible or do I need to run my initial process in background so that the screen is visible?

Answer 1

Anything that takes over ~200ms should be run as a background task. You can either use an AsyncTask or a Thread / Handler combination.

• AsyncTask
• Painless threading
• Threading
• Designing for responsiveness
• Thread documentation
• Handler documentation