- Getting the SDK
- Running the APSCloud example application
- Enabling Cloud services in a new project
- Making API Calls and Handling Responses
- Making Generic REST APIs Method Calls
- Working with Push Notifications
The AMPLIFY Appcelerator Platform Services SDK for Android provides APIs for your Android application built with Java to access Mobile Backend Services (MBS).
Getting the SDK
To download and start using the SDK, you first need to register your Android application in Dashboard. See Managing Non-Titanium Client Applications in Dashboard for details on registering a new application. After you register the application, a service key is generated that associates your application with all the Platform services. Appcelerator Dashboard also provides full instructions for enabling all Platform Services in your application. This guide will deal specifically with enabling and using MBS in an Android application.
Running the APSCloud example application
The SDK ZIP file includes an Android sample project that demonstrates the basic usage of each of the Cloud APIs. To run the sample, you first need to register a new application in Dashboard to obtain the necessary service key. You will then copy the key into the imported sample project's main Activity and then run the application.
To create the APSCloudExample application in Dashboard:
- Log into the AMPLIFY Platform.
- Select the Dashboard link on the Dashboard tile.
- From the Orgs menu, select the organization to associate with the application. Note that the Orgs menu will not appear if you are not a member of multiple organizations.
- Click the Add menu (+) and select Register App for Services.
- In the dialog:
- Type APSCloudExampleApp (or another name) in the Name field.
- Select Android from the Platform menu.
- Select any category from the Category menu.
- Click Next and then click the Overview tab.
- Click the Services tab, then click Show Key under Cloud > Performance > Analytics.
- Select Development from the Environment menu, then click the clipboard icon to copy the key to your clipboard.
Next, import the APSCloudExample project into Eclipse, copy the key from your clipboard into the application's main activity, and run the application.
To import the completed APSCloudExample project:
- In Eclipse, select File > Import > General > Existing Code into Workspace, then click Next.
- Click Browse and navigate to the
appcelerator-sdk-android-<VERSION>/examples/APSCloudExamplefolder, and click Open.
- Click Finish.
- Open the
Locate the following line of code and replace << YOUR APP KEY >> with the application key you copied to your clipboard previously.
- Run the application on an Android device or emulator.
Once the application is running, try the following:
- Create a new user by selecting Users > Create User. Enter a username, password, and password confirmation, then click Create. If the user is created successfully, the following dialog is shown:
- View the newly created user in Dashboard:
- Log into the AMPLIFY Platform.
- Select the Dashboard link on the Dashboard tile.
- Select your MBS application from the Apps tab.
- Select Manage Data, then click Users in the Manage Data Objects table. You should see the user you created listed in the Users table.
Enabling Cloud services in a new project
Once you've registered an application in Dashboard, downloaded the SDK, and obtained your application service key, there are few steps to enable Cloud services in your Android project.
To enable the Cloud services in your project:
- Copy the
appcelerator-sdk-android-<VERSION>.jarfile to your project's
Add the following permission to your project's
Import the APSServiceManager class into the project's main Activity:
APSServiceManager.getInstance().enable(), passing it the application context and the application key provided by Dashboard:
At this point, your application can begin making API calls. Note that the application will need to import additional classes, depending on which APS APIs it uses.
Making API Calls and Handling Responses
The com.appcelerator.aps package contains a collection of classes whose methods map to individual REST API method endpoints. For example, the
APSUsers.create() method corresponds to the
/users/create.json method endpoint.
Building Request Parameters
The first parameter of each Cloud API method is a
HashMap object that contains the parameters to send with the request. For example, the
APSPhotos.show() method takes a
photo_id parameter whose value is, naturally, the ID of the photo to show.
The second parameter of each method call is an instance of APSResponseHandler, an interface that has the following signature:
The instance you specify must override the
onException methods. The
onResponse method is invoked upon completion of a Cloud API call, and the
onException handler is invoked if there is an exception while communicating with the MBS server.
The APSResponse object provides getter methods to access information about the response. For instance, the
getSuccess() method returns a boolean indicating if the method call was successful or not; the
getResponse() method returns a JSON-encoded object with the results of the method call.
onException() handler is invoked for any exceptions that occur during communication with the MBS server.
Example: APSUsers Login Call with Response Handler
The following example logs in an existing MBS user by their username and password. After a successful login, the application updates a TextView object with the user's MBS username.
Monitoring Request Progress
For Cloud API methods that involve uploading large files, such as
APSFiles.create(), there is an overloaded version that takes an optional
progressHandler parameter. This parameter takes an APSProgressHandler instance, which must provide an
onProgress handler. This handler is periodically triggered as the file transfer continues and is passed an integer between 0-100, indicating the current upload progress.
Example: APSFiles Create Call with Progress Handler
The following example uploads a file from the device (
/res/raw/reference.pdf) to the MBS storage server. Since the method call requires that uploaded data be an instance of
java.io.File, the application needs to copy the resource to a read-write directory before uploading it. Locally storing the file requires that the WRITE_EXTERNAL_STORAGE permission is included in your AndroidManifest.xml file.
The progress callback calls the
setProgress() method on a
ProgressBar object, displaying the status of the upload. After the request completes, the application displays a toast notification.
Making Generic REST APIs Method Calls
APSCloud.sendRequest() method lets you quickly make REST API calls directly against MBS, rather than using the specialized classes (like
APSUsers). In general, you should use specialized classes as they provide an easier API. However, if new REST methods are deployed to the APS Cloud backend, this approach lets you immediately start using those methods without waiting for an update to the SDK.
To make a generic request, you call
APSCloud.getInstance() to get a reference to the shared APSCloud object and call its
sendRequest() method. For each call, you must specify the following:
- REST API method endpoint relative to
api.cloud.appcelerator.com/v1. Method endpoints are listed in the corresponding entries in the REST API documentation.
- The HTTP method to use.
- Data to send with the request.
For example, to create a post, pass the
sendRequest() method the following information:
- REST API method endpoint:
- The HTTP method to use:
- Data to send with the request: at a minimum, you must specify the
The following uses the
sendRequest() API to create a new Post object.
Working with Push Notifications
APSPushNotifications class lets your application subscribe, send, and receive push notifications. To use the class, you also need the
APSCloudPush class, which provides the underlying services to handle incoming push notifications.
To use these classes:
- Configure push services for your application.
- Add Google Play services as a dependency to your project and update the project's
AndroidManifest.xmlfile. See the Android Project Requirements section below.
- Retrieve the device token and subscribe to push notifications with MBS. See the Subscribe to push notifications section below.
Android Project Requirements for using APSCloud Push
Once you have configured your Google Cloud Messaging (GCM) or Firebase Cloud Messaging (FCM) settings in Dashboard, there are some required configuration changes to your Android project to use
APSCloudPush. Firebase Cloud Messaging (FCM) is the new version of GCM.
Add Google Play services
APSCloudPush requires that Google Play services be included in your application.
- Download the Google Play services SDK using the Android SDK Manager.
- Copy the
<android-sdk>/extras/google/google_play_services/libproject/google-play-services_libfolder to the same workspace folder as your Android projects (not into your Android project).
Add the following inside the
<application/>element of your
For Android Studio projects, update the
dependencies field of the
build.gradle file, then save and sync the gradle file.
For Eclipse projects:
- Import the library project into Eclipse. (From the menu, click File > Import, then select Android > Existing Android Code into Workspace, and browse to the copy of the library project to import it.)
- In the application project, reference the Google Play services library project. Right-click the project folder and select Properties, then select Android, click Add.. and select the library project.
For other projects, update the
project.properties file to reference the library project:
For detailed directions, see Android Developer: Setting Up Google Play Services.
The following changes must be added to your project's
AndroidManifest.xml file to use
APSCloudPush. Replace each occurrence of "YOURAPPSPACKAGENAME" with the actual package name of your application.
Subscribe to push notifications
Once the project is set up, the application needs to register with MBS to receive push notifications. The application should do this once the application starts, for example, in the
onCreate() method of the application's main activity.
To register push notifications, the application needs to retrieve the device token using the
APSCloudPush.getInstance.retrieveDeviceToken() method, then pass the token to either the
APSPushNotifications.subscribeToken() method to subscribe to a push channel.
For example, the code below can be added to the main activity's
onCreate() method to subscribe the device to the
Once push services have been configured, and you've obtained a device token by registering your application to receive push notifications, you can start calling methods of the
CloudPush sample application
The SDK includes the
APSCloudPushExample application that demonstrates the use of the
APSCloudPush APIs. To run the sample application, you'll first need to create an Android application in Dashboard (or use an existing application) and configure its push notification settings to include a GCM or FCM sender ID and application key.
APSCloudPush requires Google Play services, so you'll also need to add that library as a dependency to your project.
To import and run the APSCloudPushExample application:
- In Eclipse, select File > Import > General > Existing Projects into Workspace and click Browse.
- Navigate to the
appcelerator-sdk-android-<VERSION>/examples/APSCloudPushExamplefolder and click Open.
- Click Finish to import the project.
- Add the Google Play services to your project (see Android Project Requirements for instructions).
In MainActivity.java, locate the following line and replace << YOUR APP KEY >> with the application key generated by Dashboard:
Run the application on an Android device or emulator.