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Build your first app

Lesson 1

Android Developer Fundamentals V2

This work is licensed under a Creative Commons Attribution 4.0 International License.

Your first Android app

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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1.1 Your first Android app

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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Contents

Android Studio
Creating "Hello World" app in Android Studio
Basic app development workflow with Android Studio
Running apps on virtual and physical devices

Android Developer Fundamentals V2

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Create your first Android app

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Prerequisites

Java Programming Language
Object-oriented programming
XML - properties / attributes
Using an IDE for development and debugging

Android Developer Fundamentals V2

Your first Android app

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Android Studio

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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What is Android Studio?

Android integrated development environment (IDE)
Project and Activity templates
Layout editor
Testing tools
Gradle-based build
Log console and debugger
Emulators

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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Android Studio interface

Toolbar
Navigation bar
Project pane
Editor
Tabs for other panes

Android Developer Fundamentals V2

Your first Android app

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Installation Overview

Mac, Windows, or Linux
Download and install Android Studio from https://developer.android.com/studio/
See 1.1 P: Android Studio and Hello World

Android Developer Fundamentals V2

Your first Android app

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Creating your �first Android app

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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Start Android Studio

Android Developer Fundamentals V2

Your first Android app

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Create a project inside Android Studio

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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Name your app

Android Developer Fundamentals V2

Your first Android app

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Pick activity template

Choose templates for common activities, such as maps or navigation drawers.

Pick Empty Activity or Basic Activity for simple and custom activities.

Android Developer Fundamentals V2

Your first Android app

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Name your activity

Good practice:

Name main activity MainActivity
Name layout activity_main

Use AppCompat
Generating layout file is convenient

Android Developer Fundamentals V2

Your first Android app

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Project folders

manifests—Android Manifest file - description of app read by the Android runtime
java—Java source code packages
res—Resources (XML) - layout, strings, images, dimensions, colors...
build.gradle—Gradle build files

Android Developer Fundamentals V2

Your first Android app

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Gradle build system

Modern build subsystem in Android Studio
Three build.gradle:

project
module
settings

Typically not necessary to know low-level Gradle details
Learn more about gradle at https://gradle.org/

Android Developer Fundamentals V2

Your first Android app

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Run your app

2. Select virtual or physical device

3. OK

Android Developer Fundamentals V2

Your first Android app

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Create a virtual device

Use emulators to test app on different versions of Android and form factors.

Tools > Android > AVD Manager or:

Android Developer Fundamentals V2

Your first Android app

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Configure virtual device

Choose hardware
Select Android version
Finalize

Android Developer Fundamentals V2

Your first Android app

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Run on a virtual device

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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Run on a physical device

Turn on Developer Options:

Settings > About phone
Tap Build number seven times

Turn on USB Debugging

Settings > Developer Options > USB Debugging

Connect phone to computer with cable

Windows/Linux additional setup:

Using Hardware Devices

Windows drivers:

OEM USB Drivers

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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Get feedback as your app runs

Emulator running the app
Run pane
Run tab to open or close the Run pane

Android Developer Fundamentals V2

Your first Android app

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Adding logging to your app

As the app runs, the Logcat pane shows information
Add logging statements to your app that will show up in the Logcat pane
Set filters in Logcat pane to see what's important to you
Search using tags

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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The Logcat pane

Logcat tab to show Logcat pane
Log level menu

Android Developer Fundamentals V2

Your first Android app

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Logging statement

import android.util.Log;

// Use class name as tag

private static final String TAG = � MainActivity.class.getSimpleName();

// Show message in Android Monitor, logcat pane

// Log.<log-level>(TAG, "Message");

Log.d(TAG, “Creating the URI…”);

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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Learn more

Meet Android Studio
Official Android documentation at developer.android.com
Create and Manage Virtual Devices
Supporting Different Platform Versions
Supporting Multiple Screens

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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Learn even more

Gradle Wikipedia page
Google Java Programming Language style guide
Find answers at Stackoverflow.com

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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What's Next?

Concept Chapter: 1.1 Your first Android app
Practical: 1.1 Android Studio and Hello World

Android Developer Fundamentals V2

Your first Android app

This work is licensed under a Creative Commons Attribution 4.0 International License.

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END

Android Developer Fundamentals V2

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License