Android example source code file (ExpandedMenuView.java)

This example Android source code file (ExpandedMenuView.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, attributeset, content, expandedmenuview, iteminvoker, listadapter, listview, menuadapter, menubuilder, onitemclicklistener, override, typedarray, ui, util, view, widget

The ExpandedMenuView.java Android example source code

/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.internal.view.menu;


import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.View;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;

import com.android.internal.view.menu.MenuBuilder.ItemInvoker;

/**
 * The expanded menu view is a list-like menu with all of the available menu items.  It is opened
 * by the user clicking no the 'More' button on the icon menu view.
 */
public final class ExpandedMenuView extends ListView implements ItemInvoker, MenuView, OnItemClickListener {
    private MenuBuilder mMenu;

    /** Default animations for this menu */
    private int mAnimations;
    
    /**
     * Instantiates the ExpandedMenuView that is linked with the provided MenuBuilder.
     * @param menu The model for the menu which this MenuView will display
     */
    public ExpandedMenuView(Context context, AttributeSet attrs) {
        super(context, attrs);
        
        TypedArray a = context.obtainStyledAttributes(attrs, com.android.internal.R.styleable.MenuView, 0, 0);
        mAnimations = a.getResourceId(com.android.internal.R.styleable.MenuView_windowAnimationStyle, 0);
        a.recycle();

        setOnItemClickListener(this);
    }

    public void initialize(MenuBuilder menu, int menuType) {
        mMenu = menu;

        setAdapter(menu.new MenuAdapter(menuType));
    }

    public void updateChildren(boolean cleared) {
        ListAdapter adapter = getAdapter();
        // Tell adapter of the change, it will notify the mListView
        if (adapter != null) {
            if (cleared) {
                ((BaseAdapter)adapter).notifyDataSetInvalidated();
            }
            else {
                ((BaseAdapter)adapter).notifyDataSetChanged();
            }
        }
    }

    @Override
    protected void onDetachedFromWindow() {
        super.onDetachedFromWindow();
        
        // Clear the cached bitmaps of children
        setChildrenDrawingCacheEnabled(false);
    }

    @Override
    protected boolean recycleOnMeasure() {
        return false;
    }

    public boolean invokeItem(MenuItemImpl item) {
        return mMenu.performItemAction(item, 0);
    }

    public void onItemClick(AdapterView parent, View v, int position, long id) {
        invokeItem((MenuItemImpl) getAdapter().getItem(position));
    }

    public int getWindowAnimations() {
        return mAnimations;
    }
    
}