content: package com.android.ex.photo;
  
  
  import android.graphics.drawable.Drawable;
  import androidx.appcompat.app.ActionBar;
  
  /**
   * Wrapper around {@link ActionBar}.
   */
  public class ActionBarWrapper implements ActionBarInterface {
  
      private final ActionBar mActionBar;
  
      private class MenuVisiblityListenerWrapper implements ActionBar.OnMenuVisibilityListener {
  
          private final ActionBarInterface.OnMenuVisibilityListener mWrapped;
  
          public MenuVisiblityListenerWrapper(ActionBarInterface.OnMenuVisibilityListener wrapped) {
              mWrapped = wrapped;
          }
  
          @Override
          public void onMenuVisibilityChanged(boolean isVisible) {
              mWrapped.onMenuVisibilityChanged(isVisible);
          }
      }
  
      public ActionBarWrapper(ActionBar actionBar) {
          mActionBar = actionBar;
      }
  
      @Override
      public void setDisplayHomeAsUpEnabled(boolean showHomeAsUp) {
          mActionBar.setDisplayHomeAsUpEnabled(showHomeAsUp);
      }
  
      @Override
      public void addOnMenuVisibilityListener(OnMenuVisibilityListener listener) {
          mActionBar.addOnMenuVisibilityListener(new MenuVisiblityListenerWrapper(listener));
      }
  
      @Override
      public void setDisplayOptionsShowTitle() {
          mActionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_TITLE, ActionBar.DISPLAY_SHOW_TITLE);
      }
  
      @Override
      public CharSequence getTitle() {
         return mActionBar.getTitle();
      }
  
      @Override
      public void setTitle(CharSequence title) {
          mActionBar.setTitle(title);
      }
  
      @Override
      public void setSubtitle(CharSequence subtitle) {
          mActionBar.setSubtitle(subtitle);
      }
  
      @Override
      public void show() {
          mActionBar.show();
      }
  
      @Override
      public void hide() {
          mActionBar.hide();
      }
  
      @Override
      public void setLogo(Drawable logo) {
          mActionBar.setLogo(logo);
      }
  
  }
  