Android Installation Guide In order to install the Android SDK you can either follow this link or do as the following Android SDK Installation Follow this link to download the SDK Please notice that the SDK that come with the Phone is 2 0 1 Therefore DO NOT choose the build target as 2 1 for your program because then you won t be able to install the application on your Droid phone Use the SDK 1 6 After you agree to the terms of the SDK license click on the link that corresponds to your OS Linux Mac OS X Windows and download the zip file It is recommended that you download everything on Windows since our motorola usb driver that needs to be installed on your machine is available for windows Go to Motorala USB driver section for more info Unzip the archive at a suitable location in your machine We will refer to this location as ANDROID HOME from now on By default the files are unzipped into a folder called android sdk platform release build and has subdirectories tools samples and docs Windows versions have another folder for the usbdriver On Linux edit your bash profile to add tools to your path export PATH PATH ANDROID HOME tools On Mac the process is similar to linux Create a bash profile if you dont have one already On Windows right click on My Computer and select Properties Under the Advanced tab hit the Environment button Double click on Path in the window that comes up Add the full path to the tools directory here Remember that if you update your Android SDK you also need to update the paths that have been set JDK Installation Download JDK 6 Update 19 from the following link Please note that you are required to install JDK and not just the JRE Eclipse Installation Download Eclipse IDE for Java Developers 92 MB from the following link Unzip the downloaded file at an appropriate location NOTE If you are using Linux it is recommended that you use your package manager synaptic apt get for ubuntu and other debian based distros and yum for fedora and other redhat based distros to install eclipse Also ensure that your version is Ganymede or Eclipse 3 4 Install Android Development Tools For the android development tools go to Help Install New Software Click on Add and Add https dl ssl google com android eclipse as URL Now you will see Android Development Tools in the available software Select and install this package After the installation and restart you need to update the preferences for ADT This can be done by going to Window Preferences Eclipse Preferences on Mac select Android For the SDK Location click browse and find the location where the android sdk was unzipped Click Apply and then Ok On the toolbar click on Android SDK and Android Manager Then click on Available Packages and select Android SDK 1 6 and Install Then in the left menu Virtual Devices New Enter the following Name Android 1 6 Emulator Target Android 1 6 Size 64 MB Then click on Create AVD Motorola USB driver Your operation system needs to install the USB driver so it can recognize the device The drivers provided here are for windows If you are using any other OS you need to look for the proper driver to install For 32 bit Windows http infolab usc edu projects GeoTrust download Handset USB Driver 3 2 v4 2 4 msi For 64 bit windows http infolab usc edu projects GeoTrust download Handset USB Driver x 64 v4 2 4 msi Phone Registration Each phone needs a Google account Each group needs to create a google account with the following format First name infolab Last name USC Account infolabXX usc gmail com Password infolabXX XX stands for 2 digits number which is assigned to your phone Secondary email infolab usc gmail com Hello World Application In this project here is also a link we will learn to create our first application in Android outputting Hello World on the screen of an Android screen Outline Create a new project Fill out the project details Edit auto generated source code template to display some output Creating the Project Create a new Android project via the File New Project menu item If the Android Plugin for Eclipse has been successfully installed the resulting dialog should have a folder labeled Android which should contain a single entry Android Project Select Android Project and click Next Fill out the project details Edit the auto generated source code After the plugin runs you ll have a class named HelloAndroid found in your package HelloAndroid src com android hello It should look like this public class HelloAndroid extends Activity Called when the activity is first created Override public void onCreate Bundle savedInstanceState super onCreate savedInstanceState setContentView R layout main This compiles right away but lets see what s happening underneath Construct the UI Take a look at this revised code below and make the same changes to your HelloAndroid java file We ll dissect it line by line package com android hello import android app Activity import android os Bundle import android widget TextView public class HelloAndroid extends Activity Called when the activity is first created Override public void onCreate Bundle savedInstanceState super onCreate savedInstanceState TextView tv new TextView this tv setText Hello Android setContentView tv Tip If you forgot to import the TextView package try this press Ctrl ShiftO Cmd Shift O on Mac This is an Eclipse shortcut to organize importsit identifies missing packages and adds them for you In Android user interfaces are composed of hierarchies of classes called Views A View is simply a drawable object such as a radio button an animation or in our case a text label The specific name for the View subclass that handles text is simply TextView Here s how you construct a TextView TextView tv new TextView this The argument to TextView s constructor is an Android Context instance The Context is simply a handle to the system it provides services like resolving resources obtaining access to databases and preferences and so on The Activity class inherits from Context Since our HelloAndroid class is a subclass of Activity it is also a Context and so we can pass the this reference to the TextView Once we ve constructed the TextView we need to tell it what to display tv setText Hello Android Nothing too surprising there At this point we ve constructed a TextView and told it what text to display The final step is to connect this TextView with the on screen display like so setContentView tv The setContentView method on Activity indicates to the system which View