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Commit 7f9b9054 authored by Adam Powell's avatar Adam Powell
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Add ActionBar tab callback method onTabReselected 

onTabReselected is called if an already-selected tab is chosen again.
For many apps this will be a no-op, but some may treat it as a signal
to return to the top level of a given navigation category.

Change-Id: Ic51fbe477b979562f2d848c4070b2016b217a90f
parent ce146d9d

api/current.xml

+15 −0
Original line number Diff line number Diff line
@@ -19972,6 +19972,21 @@ 
 deprecated="not deprecated"

 visibility="public"

>

<method name="onTabReselected"

 return="void"

 abstract="true"

 native="false"

 synchronized="false"

 static="false"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<parameter name="tab" type="android.app.ActionBar.Tab">

</parameter>

<parameter name="ft" type="android.app.FragmentTransaction">

</parameter>

</method>

<method name="onTabSelected"

 return="void"

 abstract="true"

core/java/android/app/ActionBar.java

+10 −0
Original line number Diff line number Diff line
@@ -470,5 +470,15 @@ public abstract class ActionBar { 
         *        will be executed in a single transaction.

         */

        public void onTabUnselected(Tab tab, FragmentTransaction ft);



        /**

         * Called when a tab that is already selected is chosen again by the user.

         * Some applications may use this action to return to the top level of a category.

         *

         * @param tab The tab that was reselected.

         * @param ft A {@link FragmentTransaction} for queuing fragment operations to execute

         *        once this method returns.

         */

        public void onTabReselected(Tab tab, FragmentTransaction ft);

    }

}

core/java/com/android/internal/app/ActionBarImpl.java

+14 −11
Original line number Diff line number Diff line
@@ -326,12 +326,14 @@ public class ActionBarImpl extends ActionBar { 


    @Override

    public void selectTab(Tab tab) {

        final FragmentTransaction trans = mActivity.getFragmentManager().openTransaction();



        if (mSelectedTab == tab) {

            return;

            if (mSelectedTab != null) {

                mSelectedTab.getCallback().onTabReselected(mSelectedTab, trans);

            }



        } else {

            mActionView.setTabSelected(tab != null ? tab.getPosition() : Tab.INVALID_POSITION);

        final FragmentTransaction trans = mActivity.getFragmentManager().openTransaction();

            if (mSelectedTab != null) {

                mSelectedTab.getCallback().onTabUnselected(mSelectedTab, trans);

            }
@@ -339,6 +341,7 @@ public class ActionBarImpl extends ActionBar { 
            if (mSelectedTab != null) {

                mSelectedTab.getCallback().onTabSelected(mSelectedTab, trans);

            }

        }



        if (!trans.isEmpty()) {

            trans.commit();