Learn Android Programming using Android Studio 2

Learn Android Programming using the latest Android Studio 2. In this course you will learn all the fundamental building blocks of Android programming:

• Activities
• Intents
• Broadcasts and Broadcast Receivers
• Google Maps
• Location Based Services
• Databases
• File Storage

At the end of the course, you would have the knowledge to build some cool and exciting Android Apps and test it on your real devices!

Xcode 6 - iPhone Simulator Folder

In Xcode 6, the location of the applications on the iPhone Simulator has changed. Prior to iOS 8, the location of the Documents folder of your app can be found here:

/Users/weimenglee/Library/Application\ Support/iPhone\ Simulator/<iOS_Version>/Applications/<application_id>/Documents 

In xCode 6, the location of the simulator has changed to:

/Users/weimenglee/Library/Developer/CoreSimulator/

However, this location contains a list of folders for different types of simulators. If you go into this folder, you will see something like this:

Each folder correspond to a specific iPhone Simulator. To know which folder corresponds to which simulator, use the following command in Terminal:

Weis-Mac-mini:~ weimenglee$ xcrun simctl list

== Device Types ==

iPhone 4s (com.apple.CoreSimulator.SimDeviceType.iPhone-4s)

iPhone 5 (com.apple.CoreSimulator.SimDeviceType.iPhone-5)

iPhone 5s (com.apple.CoreSimulator.SimDeviceType.iPhone-5s)

iPhone 6 Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-6-Plus)

iPhone 6 (com.apple.CoreSimulator.SimDeviceType.iPhone-6)

iPad 2 (com.apple.CoreSimulator.SimDeviceType.iPad-2)

iPad Retina (com.apple.CoreSimulator.SimDeviceType.iPad-Retina)

iPad Air (com.apple.CoreSimulator.SimDeviceType.iPad-Air)

Resizable iPhone (com.apple.CoreSimulator.SimDeviceType.Resizable-iPhone)

Resizable iPad (com.apple.CoreSimulator.SimDeviceType.Resizable-iPad)

== Runtimes ==

iOS 7.0 (7.0 - Unknown) (com.apple.CoreSimulator.SimRuntime.iOS-7-0) (unavailable, runtime path not found)

iOS 7.1 (7.1 - Unknown) (com.apple.CoreSimulator.SimRuntime.iOS-7-1) (unavailable, runtime path not found)

iOS 8.0 (8.0 - 12A365) (com.apple.CoreSimulator.SimRuntime.iOS-8-0)

== Devices ==

-- iOS 7.0 --

-- iOS 7.1 --

-- iOS 8.0 --

    iPhone 4s (8C1303A2-C590-4822-BB9B-12EC32035C8C) (Shutdown)

    iPhone 5 (402C822D-567F-4F3A-B113-1499C5A7949C) (Shutdown)

    iPhone 5s (B6D71F6A-E94B-47ED-AF25-882FDEF8E6F5) (Shutdown)

    iPhone 6 Plus (5BCD1507-6F06-4D66-B71D-47670EB703B2) (Shutdown)

    iPhone 6 (00100565-4E4D-4D9A-A875-544E0A6E4F4F) (Booted)

    iPad 2 (187D75DD-824D-4381-AE2F-BDF57FEB87E0) (Shutdown)

    iPad Retina (604667D3-8366-4147-B0AD-F7840198713C) (Shutdown)

    iPad Air (01D6AEBC-F12A-47EE-82CB-0140AF117AE0) (Shutdown)

    Resizable iPhone (9C138BCD-BFB9-4AEB-A218-F0F99F678220) (Shutdown)

    Resizable iPad (4966C908-AAA7-43EC-8E3A-EADF8BFA3C05) (Shutdown)

Weis-Mac-mini:~ weimenglee$ 

In my example here, I am looking for iPhone 6, which has the device id of 00100565-4E4D-4D9A-A875-544E0A6E4F4F. You can then go into this folder and the following path shows the folder that contains all the applications installed on this simulator:

/Users/weimenglee/Library/Developer/CoreSimulator/Devices/00100565-4E4D-4D9A-A875-544E0A6E4F4F/data/Containers/Data/Application/

You can now locate your specific application and find the Documents folder:

/Users/weimenglee/Library/Developer/CoreSimulator/Devices/00100565-4E4D-4D9A-A875-544E0A6E4F4F/data/Containers/Data/Application/FD7949EA-7D39-4BC6-95F4-77F320592651/Documents/

iOS 8 - Getting Location Data

Getting location data in iOS 8 has changed drastically. Here is what you need to do if you are using the CLLocationManager class to get a location in iOS 8.

In iOS 8, you need to add the following two keys in your info.plist file:

For getting location in the foreground

Key

NSLocationWhenInUseUsageDescription

Value

"This app will display your current location" (up to you to write anything you want here)

For getting location in the background

Key

NSLocationAlwaysUsageDescription

Value

"This app will log your location into a database" (up to you to write anything you want here)

Before you use the startUpdatingLocation() method, you have to request for user's permission. To use the location in the foreground, call the requestWhenInUseAuthorization() method:

var lm: CLLocationManager!

...

        if (UIDevice.currentDevice().systemVersion as NSString).floatValue>=8.0 {            

            //---request for foreground location use---

            lm.requestWhenInUseAuthorization()

        }

        

        lm.startUpdatingLocation()

If you want to continue getting location data in the background, call the requestAlwaysAuthorization() method:

        if (UIDevice.currentDevice().systemVersion as NSString).floatValue>=8.0 {

            //---request for background location use---

            lm.requestAlwaysAuthorization()

        }

Note that if you want the app to access location information both in the foreground and in the background, it is sufficient to call the requestAlwaysAuthorization() method.

Foundation of Pebble Programming - 7-8 April 2014

The next run of the Foundation of Pebble Programming course would be held on the 7-8 April 2014. Come and learn how to write interesting apps on your Pebble watch. You will also learn how to write Javascript code that communicates with your Pebble watch. Once you learn that, you will be able to write apps that tells your location, displays stock prices, and more!

The fee of S$1,295 includes a Pebble watch! Download course brochures and application form here.