How to send your activities to the background and resume?

Question

I want to download data from the Internet.

During data loading, I show a loading indicator. What I want to do, when I click back, I cancel the download indicator through onCancelEvent() . I want my activity to continue in the background, so the latest activity is shown ahead.

I do not want to complete () and run the last action, since all the data is displayed in it, which will be loaded again if it is recreated.

Can anyone help?

Answer 1

Basically you want to switch the order of the current background and previous background. To do this, you can start the previous operation and use the flag FLAG_ACTIVITY_REORDER_TO_FRONT:

 Intent intent = new Intent(this, MyPreviousActivity.class); intent.setFlags(FLAG_ACTIVITY_REORDER_TO_FRONT); startActivity(intent); 

So, if you have tasks A, B, C and task C calls startActivity () with activity B, then B will be moved to the beginning of the action stack with the resulting order A, C, B, which is what you requested.

See Intent.FLAG_ACTIVITY_REORDER_TO_FRONT

Answer 2

Just use:

 moveTaskToBack(true);