CODEWITHSUNDEEP
javaandroidandroid-intentandroid-activitystack
Sahil Gupta
Sahil Gupta

Reputation: 43

Android Clear Middle Activities

I have 5 Activities,

A - Base Activity

B,C,D - Normal Activities

E - Final Activity

A-B-C-D-E

I navigate from A to B to C to D, D takes me to E. I want behaviour : if I press back button on D it should take me to C , back button from C should take me to B down to A. But if I have moved to Activity E from D, I want the back button from E it should take me to A skipping B,C and D.

Upvotes: 3

Views: 496

Answers (3)

David Wasser
David Wasser

Reputation: 95578

In E:

@Override
public void onBackPressed() {
    Intent intent = new Intent(this, ActivityA.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP) | Intent.FLAG_ACTIVITY_SINGLE_TOP);
    startActivity(intent);
}

This will go back to A, finishing B, C, D and E.

Using FLAG_ACTIVITY_SINGLE_TOP will ensure that you return to the existing instance of A. If you want to also finish the existing instance of A and create a new one to return to, simply remove FLAG_ACTIVITY_SINGLE_TOP.

Upvotes: 4

borichellow
borichellow

Reputation: 1001

you can "group" you activities, by using affinity. So in Manifest file add android:taskAffinity="activity.normal" to activities B,C,D,E. And now you'll be able to finish all this group in any of this activities by calling finishAffinity() (instead of usual finish()) in your case you can just add to E activity:

@Override
public void onBackPressed() {
    finishAffinity();
    super.onBackPressed();
}

Upvotes: 0

Mo.
Mo.

Reputation: 61

You can use a static variable to track which activity you're coming from. Then override onBackPressed to check that variable and move to the appropriate activity. Something like:

public static Boolean skipActivities = false;

Then when you start activity E from D set it to true. For your activity E:

@Override
public void onBackPressed() {
    if (skipActivities){
        //start activity A, skipActivities should be reset to false also
    } else {
        super.onBackPressed();
    }
}

Upvotes: 1

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