如何在Android中设置后台堆栈中的活动限制？

Question

In the app that I am making, there are 12 different activities linked to the main page. All of them are independent of each other. I want the previous activities removed from the back stack so that the app takes less memory. I have managed to have single instance of each activity by using

android:launchMode = "singleInstance"

But still when these activities are started from the main page, 12 different pages go in the back stack and app crashes. What is the work-around?

Answer 1

It sounds like android:noHistory="true" would be the solution for you.

A value of "true" means that the activity will not leave a historical trace. It will not remain in the activity stack for the task, so the user will not be able to return to it.

How does android:noHistory="true" work?

Answer 2

when you go back start the MainActivty,call this on backpress on 12 activitys.

Intent intent  = new Intent(youeActivity.this,MainActivity.class); 
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK|Intent.FLAG_ACTIVITY_CLEAR_TOP);      
startActivity(intent);
finish();

manofest add this one

android:excludeFromRecents="true"