CODEWITHSUNDEEP
android
shabeer
shabeer

Reputation: 143

Android back button going to main activity when I pressed logout button

*I have created a main Activity and login activity.

*My app will redirect user to login activity when they click on logout button but, problem is when I click on back it still goes to main activity which I don't want my app to do.

*According to me writing some condition with back button listener will help in some way. Is there any other solution to prevent this?

Upvotes: 1

Views: 3310

Answers (3)

Libin
Libin

Reputation: 17085

When you start the login activity , you can clear all the other Activity in stack using Intent.FLAG_ACTIVITY_CLEAR_TASK flag.

FLAG_ACTIVITY_CLEAR_TASK flag will cause any existing task that would be associated with the activity to be cleared before the activity is started. i.e., the activity becomes the new root and any old activities are finished. This flag can only be used in conjunction with FLAG_ACTIVITY_NEW_TASK

Example :

Intent intent = new Intent(this, LoginActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);

Note: After you close the LoginActivity using back and if you launch from `Activity History' the LoginActivity will be launched(not the MainActivity)

Upvotes: 4

cYrixmorten
cYrixmorten

Reputation: 7108

To make the back button always exit the app when in LoginActivity:

@Override
public void onBackPressed() {
    Intent intent = new Intent(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_HOME);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(intent);
    super.onBackPressed();
}

To remove the MainActivity from the task stack when redirecting:

    Intent intent = new Intent(MainActivity.this,
            LoginActivity.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
    startActivity(intent);

Upvotes: 1

Rod_Algonquin
Rod_Algonquin

Reputation: 26198

When you logout make sure that the your main activity is not overlapping with your login activity

Solution:

Intent intent = new Intent(this,LoginActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        finish();
        startActivity(intent);

FLAG_ACTIVITY_CLEAR_TOP: If set, and the activity being launched is already running in the current task, then instead of launching a new instance of that activity, all of the other activities on top of it will be closed and this Intent will be delivered to the (now on top) old activity as a new Intent.

Upvotes: 1

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