During Part 3 of the developing iPhone and Android apps in the cloud series, we went over signing up for a brewerydb.com account as well as downloading and deploying the BeerShift backend source code on OpenShift.
In this blog post, we will discuss the mobile application code and get it working inside of Titanium Studio. If you haven’t already installed and configured XCode, Titanium Studio, and the Android SDK, please follow the steps outlined in Part 2 of this series.
Step 1: Clone the BeerShift project
In order to start working with the mobile application for BeerShift, we need a local copy of the open sourced code that is available on github. If you are not familiar with git, we are going to clone the BeerShift repository. This will copy the BeerShift source to our local machine as well as setup a local source code revision control repository that is private. This will enable us to make changes to the source code and commit them to our local private repository. Any change that you commit to BeerShift on your local machine will remain private. If you add some fancy new features, or fix some bugs, you will need to issue a pull request on github in order for the public repository to be updated with your changes.
In order to clone the BeerShift source code, open up a terminal window and create a directory for your project.
$ mkdir ~/code $ cd ~/code
Now that we have a location for our source code, lets clone the BeerShift repository.
$ git clone https://github.com/BeerShift/BeerShift.git
This will create a directory named BeerShift underneath the code directory. To verify that you have the proper source code, lets view some of the commit log.
$ cd BeerShift $ git log
At this point, you should see the last several contributions to the project.
Step 2: Import the project into Titanium Studio
Start Titanium Studio and select 'Import Project' on the left hand side of the screen.
Select 'Existing Titanium Project' and click 'Next'.
Select the location of your source from Step 1, and click on the 'Finish' button.
Step 3: Set your deployment targets
Now that we have the source code imported into Titanium Studio, we need to set the deployment targets for our application. Double click on the tiapp.xml file that is located under your project directory.
If you are on the Mac operating system, and followed all of the steps in Part 2 of this blog series to install XCode and the Android SDK, select iPhone and Android. In you are on Windows or Linux, you will not be able to target iOS devices.
Step 4: Understand the directory structure
In your 'App Explorer' pane, you should see two top-level directories. The i18n directory is where you can place all of your localization files for your application.
Localization in Titanium Studio is pretty straightforward and I will detail how to add the users default locale to your application.
Under the i18n directory, you should create a subdirectory for each language / locale that you plan to support (based on the ISO 639-1 standard). For instance, to support both English and German, create two directories: en and de
In each locale specific subdirectory, you will need a strings.xml file that is an xml based key->value pair.
<?xml version="1.0" encoding="UTF-8"?>
<string name="lblBeerName">Beer Name: </string>
<string name="tfBeerName">What am I drinking?</string>
<string name="winFirehose">Keg Stand</string>
<string name="tabFireHouse">Keg Stand</string>
<string name="winBeerDetails">Beer Details</string>
<string name="lblDrinkTheBeer">Drink It!</string>
<string name="titleLabelText"> drank </string>
<string name="lblApi">URL: </string>
<string name="lblApiHintText">Service URL</string>
<string name="lblUsername">Username: </string>
<string name="tfUsernameHintText">BeerShift Username</string>
<string name="lblPassword">Password: </string>
<string name="alrtDialogTitle">Bad Password</string>
<string name="alrtDialogMsg">Password is not correct for this user</string>
<string name="createUserTitle">That user doesn't exist. Would you like to create it?</string>
These resource files are processed and included in your project at build time.
Step 5: Getting started with the source code
Expand the 'Resources' directory and double click the app.js file.
The app.js file acts like a bootstrap for your application. This is the first file that gets loaded and is where you define and create your layout and application.
Instead of walking through the source code in this blog post, check out the video where I walk through the code and explain what is happening.
Step 6: Test your application in the simulator
Now that we have and understand the source code, lets see it running inside of the iPhone or Android emulator. In order to run the application, select 'Run' and then select 'Run' again. This will open a dialog that will allow you to select which run configuration to use.
Once you select your device, Titanium Studio will build your application code and launch the emulator. At this point, you can play around with the application and even set breakpoints and debug inside of the emulator.
Step 7: What’s next?
You should have the application up and running and hopefully pointed to your own backend hosted on OpenShift. The next step is to add a cool feature or fix a bug that is present in the source code. Once you have modified the code, submit a pull request on github and I will work to get it accepted into the master source code branch.
If you haven’t already signed up for OpenShift, take a moment to do that now. Use the promo code ‘BeerShift’ to claim your 3 free applications running on the Red Hat Cloud.
Want to see me give a presentation on mobile development? I will be at the following upcoming events:
Want me to come and speak at your users group or conference? Send an email to firstname.lastname@example.org and we can co-ordinate scheduled.