Setting "task affinity" programmatically

Question

is there a way to set the "task affinity" programmatically? I mean like with some Intent flag or sth? I didn't find anything about this being possible in the Android docs.

Setting the affinity in a static way in the AndroidManifest.xml with android:taskAffinity does not suit my needs.

Whenever launching an Activity, you can add affinity flags like so. Not sure if this is what you intended. ```Intent intent = new Intent(this, IntroActivity.class); // These flags disable back-pressing back into the previous activity intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK); startActivity(intent); finish();``` — Clark Wilson, Aug 07 '16 at 19:53
Possible duplicate of [Android: Task affinity & Clear task](https://stackoverflow.com/questions/21528508/android-task-affinity-clear-task) — Ganesh, May 04 '18 at 09:00

Stanley Ko · Answer 1 · 2019-08-23T02:17:13.017

You cannot.

taskAffinity is contained by ActivityInfo, which is member of Activity.

Source code of Activity

public class Activity extends ContextThemeWrapper
    ...
    ... {
    // set by the thread after the constructor and before 
    // onCreate(Bundle savedInstanceState) is called.

    @UnsupportedAppUsage
    /*package*/ ActivityInfo mActivityInfo;
 }

And ActivityInfo has taskAffinity.

Source code of ActivityInfo

/**
 * Information you can retrieve about a particular application
 * activity or receiver. This corresponds to information collected
 * from the AndroidManifest.xml's &lt;activity&gt; and
 * &lt;receiver&gt; tags.
 */
public class ActivityInfo extends ComponentInfo implements Parcelable {

   /**
    * The affinity this activity has for another task in the system.  The
    * string here is the name of the task, often the package name of the
    * overall package.  If null, the activity has no affinity.  Set from the
    * {@link android.R.attr#taskAffinity} attribute.
    */
    public String taskAffinity;

According to the comment of source code, information of taskAffinity is collected from AndroidManifest.xml. And there is no public method to set mActivityInfo.taskAffinity.

score -4 · Answer 2 · edited Jun 04 '20 at 23:02

-4

Use this method :

finishAffinity();

edited Jun 04 '20 at 23:02

Boken

4,825
10
32
42

answered May 08 '18 at 07:18

Prudhvi Bsecure

35
3

He is asking about "setting affinity" not finishing affinity – Mohit Rajput May 04 '22 at 09:33

Setting "task affinity" programmatically

2 Answers2