Get the value of android:name attribute of all activities of an app.

Android.java

public String getParentPackageName() {
  PackageManager pm = context.getPackageManager();
  String packageName = context.getApplicationContext().getPackageName();

  PackageInfo pi;
  try {
      pi = pm.getPackageInfo(packageName, PackageManager.GET_ACTIVITIES);
  } catch (NameNotFoundException e) {
      e.printStackTrace();
  }

  ActivityInfo[] ai = pi.activities;
  String activityName = ai[0].name; // Get the value of android:name attribute 

  String parentName = activityName.substring(0, activityName.lastIndexOf("."));

  return parentName;
}

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