Merge "Update docs for onBackPressed" into sc-dev

    }

    /**

     * Called when the activity has detected the user's press of the back

     * key.  The default implementation simply finishes the current activity,

     * but you can override this to do whatever you want.

     * Called when the activity has detected the user's press of the back key. The default

     * implementation depends on the platform version:

     *

     * <ul>

     *     <li>On platform versions prior to {@link android.os.Build.VERSION_CODES#S}, it

     *         finishes the current activity, but you can override this to do whatever you want.

     *

     *     <li><p>Starting with platform version {@link android.os.Build.VERSION_CODES#S}, for

     *         activities that are the root activity of the task and also declare an

     *         {@link android.content.IntentFilter} with {@link Intent#ACTION_MAIN} and

     *         {@link Intent#CATEGORY_LAUNCHER} in the manifest, the current activity and its

     *         task will be moved to the back of the activity stack instead of being finished.

     *         Other activities will simply be finished.

     *

     *         <p>If you target version {@link android.os.Build.VERSION_CODES#S} or later and

     *         override this method, it is strongly recommended to call through to the superclass

     *         implementation after you finish handling navigation within the app.

     * </ul>

     *

     * @see #moveTaskToBack(boolean)

     */

    public void onBackPressed() {

        if (mActionBar != null && mActionBar.collapseActionView()) {