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DroidCafe - Solution Code

App that demonstrates radio buttons, images used as buttons, the options menu, up-button navigation, and a floating action button for an implicit intent.


This app created from the Basic Activity template lets a user tap image buttons to launch an activity, and choose a single delivery option from radio-button choices for a food order. The options menu includes choices, and the app displays a Toast message showing the user’s choice. The app also uses an implicit intent so that when the user taps the floating action button, it launches the Maps app. The Up button is included in the second activity to return to the main activity.


You need to know:

  • How to open, build, and run apps with Android Studio.
  • Handling a button click.
  • Editing an XML layout file.
  • Displaying a Toast message.

Getting Started

  1. Download the code.
  2. Open the code in Android Studio.
  3. Run the app.


Copyright 2016 Google, Inc.

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you 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

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.

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