CODEWITHSUNDEEP
androidandroid-intentnavigation
Rafay
Rafay

Reputation: 24265

Stop from navigating back to an activity

I have an app with two activities. MainActivity (which is the launcher activity) and a LoginActivity. As soon as the user launches the app, MainActivity is skipped over and LoginActivity is displayed. However, if you press the back button, you can still navigate to MainActivity. I'm using the following code to stop that from happening, however it is not working.

In MainActivity class:

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

Any ideas?

Upvotes: 0

Views: 69

Answers (4)

Meenal
Meenal

Reputation: 2877

you have two options First: if you want back to work but MainActivity should not be there on Back then finish() MainActivity.

like 

 Intent intent = new Intent(this, LoginActivity.class);
 intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
 startActivity(intent);
 finish();//this line will finish MainActivity, then there will no instance of MainActivity in backstack.

Second: If you to stop back button to work , you can override OnBackPressed() metjod and remove super from that...then back button will not work (of device).

Upvotes: 0

Boldijar Paul
Boldijar Paul

Reputation: 5495

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

If you set twice, the last one will be set.

Upvotes: 1

Umair
Umair

Reputation: 6426

just use finish(); after startActivity(intent); ... finish(); will kill the activity as soon as you navigate from it.

Upvotes: 1

Muhammed Refaat
Muhammed Refaat

Reputation: 9103

just add finish(); in the last and change flags to CLEAR_TOP rather that CLEAR_TASK:

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

Upvotes: 0

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