Android: How to Clear Intent Stack While Using SingleTask

Question

I'm using Twitter oAuth library in my application. Users are logging in with ther Twitter accounts.

In activity A, twitter login is available. When user logged in, I want to start activity B with no history. Here is my all stuff:

Firstly, Manifest.xml, so I set launchMode=singleTask as Twitter api requested:

<activity
    android:name=".A_Activity"
    android:label="@string/app_name"
    android:launchMode="singleTask"
    android:theme="@android:style/Theme.Black.NoTitleBar">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" /> 
    </intent-filter>
    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data android:scheme="my_twitter_scheme" />
    </intent-filter>
</activity>

Here is how I'm starting activity B:

Intent i = new Intent(A.this, B.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);

Note: I'm calling activity B over BroadcastReceiver instance.

When I logged in, my receivers starting activity B properly, but unfortunately when I pressed the back button, application turning back to activity A.

I suppose it's about launchMode and as I said, Twitter needs that option. What am I doing wrong? Any help or suggestion (maybe about Twitter) would be great.

score 2 · Accepted Answer · edited May 23 '17 at 12:20

I'm sure there should be more efficient ways to solve this issue but, I suggest something different.

Just call finish() method after you started an activity, so activity A would finish and when user pressed back button in activity B application returns home screen as you hope.

Also check twice your dialogs to avoid any exceptions, i.e check this question (and answers too) to understand what I meant.

Android: How to Clear Intent Stack While Using SingleTask

1 Answers1