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On Android Ace Stream applications provide a service which is used to start engine (if it's not already started).

The general schema of using engine on Android is:

• bind to Ace Stream service
• send "start" command to service (to start engine)
• wait for "ready" event from service (which means that engine has started and ready to receive commands)
• use engine via Engine API or HTTP API

You can bind directly to the service via AIDL or Messenger (see Android Bound Services).

Here is the sample app which shows both ways to connect to Ace Stream service: https://bitbucket.org/AceStream/androidacestreamserviceclientexample

The third and preferred way to start engine on Android is Ace Stream Client module, which is covered later in this document. It's a wrapper around AIDL interface of Ace Stream service.

Ace Stream for Android is distributed within several packages with different application IDs.

Currently there are four official application IDs:

• org.acestream.media (Ace Stream Media for Android)
• org.acestream.media.atv (Ace Stream Media for Android TV)
• org.acestream.core (Ace Stream Engine for Android)
• org.acestream.core.atv (Ace Stream Engine for Android TV)

There is a possibility that several Ace Stream apps are installed on the same device. Each app provides its own Ace Stream service. In such situation a client should connect to the service of app with the highest version code.

If you are using Ace Stream Client the selection of proper app is done automatically.

The procedure of app selection is implemented (with comments) in ServiceClient.getServicePackage(Context ctx) method (see code).

Ace Stream Client is an Anroid Studio module which simplifies the procedure of starting Ace Stream engine on Android.

1. Open the terminal and execute these commands:

   cd your_project_folder
   git clone https://github.com/acestream/android-service-client.git AceStreamClient

2. On the root of your project create/modify the settings.gradle file. It should contain something like this:

   include ':app', ':AceStreamClient'

3. Edit your project's build.gradle to add this in the dependecies section:

   dependencies {
       // ...
       implementation project(':AceStreamClient')
   }

• import client

  import org.acestream.engine.client;

• create client instance. Usually this is done in activity's or service's onCreate method. You must provide a callback which implements ServiceClient.Callback interface to receive events from service.

  public class MyActivity extends Activity implements ServiceClient.Callback {
      private ServiceClient mClient = null;
      // ...
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate();
          // ...
          mClient = new ServiceClient(/*Context*/ this, /*ServiceClient.Callback*/ this);
      }
  
      //////////////////////////////////////////////////
      //
      // ServiceClient.Callback interface implementation
  
      @Override
      public void onConnected(int engineApiPort, int httpApiPort) {
          // Engine is ready to receive command.
          // Now you can use engine via either Engine API or HTTP API.
          // @see http://wiki.acestream.org/wiki/index.php/Engine_API
          // @see http://wiki.acestream.org/wiki/index.php/Engine_HTTP_API
      }
  
      @Override
      public void onFailed() {
          // Engine failed to start
      }
  
      @Override
      public void onDisconnected() {
          // Service is disconnected
      }
  
      @Override
      public void onUnpacking() {
          // Engine is unpacking
      }
  
      @Override
      public void onStarting() {
          // Engine is starting
      }
  
      @Override
      public void onStopped() {
          // Engine has stopped
      }
  
      @Override
      public void onPlaylistUpdated() {
          // Engine's media server event: playlist updated
      }
  
      @Override
      public void onEPGUpdated() {
          // Engine's media server event: EPG updated
      }
  
      @Override
      public void onRestartPlayer() {
          // You should restart player (stop playback and then start it with the same playback URI)
      }
  
  }

• start engine when you need it. It can be done in activity's onResume method. startEngine method throws ServiceClient.EngineNotFoundException exception when Ace Stream application is not installed.

  @Override
  protected void onResume() {
      super.onResume();
      try {
          if(mClient.startEngine()) {
              // "start" command was sent. Wait for "onConnected" callback.
          }
          else {
              // Failed to send "start" command.
          }
      }
      catch(ServiceClient.EngineNotFoundException e) {
          // Ace Stream is not installed
      }
  }

• disconnect from engine service when you no longer need it. This can be done in activity's onPause method:

  @Override
  protected void onPause() {
      super.onPause();
      mClient.disconnect();
  }

Engine will start asynchronous.

Upon successfull start callback.onConnected(int engineApiPort, int httpApiPort) method will be called.

Upon failure callback.onFailed() method will be called.