ActionBar overlay mode, height fetching, show/hide

Change-Id: Ie931ed26ec885d891d6733132b517a53d95f8491

2 files changed, 41 insertions, 2 deletions

diff --git a/core/java/android/app/ActionBar.java b/core/java/android/app/ActionBar.java
index d33494b..38086f0 100644
--- a/core/java/android/app/ActionBar.java
+++ b/core/java/android/app/ActionBar.java
@@ -18,6 +18,7 @@ package android.app;
 
 import android.graphics.drawable.Drawable;
 import android.view.View;
+import android.view.Window;
 import android.widget.SpinnerAdapter;
 
 /**
@@ -383,6 +384,34 @@ public abstract class ActionBar {
     public abstract void selectTab(Tab tab);
 
     /**
+     * Retrieve the current height of the ActionBar.
+     *
+     * @return The ActionBar's height
+     */
+    public abstract int getHeight();
+
+    /**
+     * Show the ActionBar if it is not currently showing.
+     * If the window hosting the ActionBar does not have the feature
+     * {@link Window#FEATURE_ACTION_BAR_OVERLAY} it will resize application
+     * content to fit the new space available.
+     */
+    public abstract void show();
+
+    /**
+     * Hide the ActionBar if it is not currently showing.
+     * If the window hosting the ActionBar does not have the feature
+     * {@link Window#FEATURE_ACTION_BAR_OVERLAY} it will resize application
+     * content to fit the new space available.
+     */
+    public abstract void hide();
+
+    /**
+     * @return <code>true</code> if the ActionBar is showing, <code>false</code> otherwise.
+     */
+    public abstract boolean isShowing();
+
+    /**
      * Callback interface for ActionBar navigation events. 
      */
     public interface NavigationCallback {
diff --git a/core/java/android/view/Window.java b/core/java/android/view/Window.java
index f32ff77..36f6bb2 100644
--- a/core/java/android/view/Window.java
+++ b/core/java/android/view/Window.java
@@ -64,14 +64,24 @@ public abstract class Window {
      */
     public static final int FEATURE_ACTION_BAR = 8;
     /**
+     * Flag for requesting an Action Bar that overlays window content.
+     * Normally an Action Bar will sit in the space above window content, but if this
+     * feature is requested along with {@link #FEATURE_ACTION_BAR} it will be layered over
+     * the window content itself. This is useful if you would like your app to have more control
+     * over how the Action Bar is displayed, such as letting application content scroll beneath
+     * an Action Bar with a transparent background or otherwise displaying a transparent/translucent
+     * Action Bar over application content.
+     */
+    public static final int FEATURE_ACTION_BAR_OVERLAY = 9;
+    /**
      * Flag for specifying the behavior of action modes when an Action Bar is not present.
      * If overlay is enabled, the action mode UI will be allowed to cover existing window content.
      */
-    public static final int FEATURE_ACTION_MODE_OVERLAY = 9;
+    public static final int FEATURE_ACTION_MODE_OVERLAY = 10;
     /**
      * Flag for requesting this window to be hardware accelerated, if possible. 
      */
-    public static final int FEATURE_HARDWARE_ACCELERATED = 10;
+    public static final int FEATURE_HARDWARE_ACCELERATED = 11;
     /** Flag for setting the progress bar's visibility to VISIBLE */
     public static final int PROGRESS_VISIBILITY_ON = -1;
     /** Flag for setting the progress bar's visibility to GONE */