在Android中启动其他活动时如何完成活动？

Question

I have problems to finish the activity before. I want to start another activity and finish the current activity. When I used finish it didn't exit the current activity.

How can I exit the activity before?

Answer 1

You need to intent your current context to another activity first with startActivity . After that you can finish your current activity from where you redirect.

 Intent intent = new Intent(this, FirstActivity.class);// New activity
 intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 startActivity(intent);
 finish(); // Call once you redirect to another activity

intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP) - Clears the activity stack. If you don't want to clear the activity stack. PLease don't use that flag then.

Answer 2

Intent i = new Intent(this,NewLaunchingActivity.Class);
    i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); // Call Only, if you dont want to come back to this activity on back press, else ignore this line
    startActivity(i);
    finish();

Answer 3

The best - and simplest - solution might be this:

Intent intent = new Intent(this, OtherActivity.class);
startActivity(intent);
finishAndRemoveTask();

Documentation for finishAndRemoveTask() :

Call this when your activity is done and should be closed and the task should be completely removed as a part of finishing the root activity of the task.

Is that what you're looking for?

Answer 4

1. Make your activity A in manifest file: launchMode = "singleInstance"
2. When the user clicks new, do FirstActivity.fa.finish(); and call the new Intent.
3. When the user clicks modify, call the new Intent or simply finish activity B.

Answer 5

startActivity(new Intent(context, ListofProducts.class)
    .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
    .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
    .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK));

Answer 6

For eg: you are using two activity, if you want to switch over from Activity A to Activity B

Simply give like this.

          Intent intent = new Intent(A.this, B.class);
         startActivity(intent);
         finish();