Alan Android SDK

Alan can be integrated with Android apps developed in Java and Kotlin.

Integrating with Alan

To add Alan voice to an Android app, you need to do the following:

1. Add the Alan SDK dependency

2. Add the Alan button to the app layout

3. Add the AlanConfig object

4. Connect to the Alan Studio project

Step 1. Add the Alan SDK dependency

You need to add the Alan SDK dependency to the Android app. You can do it in two ways:

• Add a reference as a Maven dependency

• Download the aar package and include it manually

Maven dependency

Do the following:

1. Open the build.gradle file at the module level.

2. In the dependencies block, add the dependency configuration for the Alan Android SDK: implementation 'app.alan:sdk:<latest-version>'. To get the latest version, check out the Releases page for the Alan Android SDK GitHub repository.

build.gradle (module level)

dependencies {
  /// Add Alan SDK dependency
  implementation "app.alan:sdk:4.12.0"
}

aar package

Do the following:

1. Download the Alan SDK from the releases section in the Alan Git repository.

2. Put it in your <project>/app/libs folder. Create the libs folder if needed.

3. Open the build.gradle file at the module level.

4. In the repositories block, add the name of the folder in which the aar package resides.

5. In the dependencies block, add the dependency configuration for the Alan Android SDK. To get the latest version, check out the Releases page for the Alan Android SDK GitHub repository.

build.gradle (module level)

repositories {
  /// Add the following line to the repositories section
  flatDir {
    dirs 'libs'
  }
}
dependencies {
  /// Add the Alan SDK dependency
  implementation (name: 'AlanSdk-4.12.0', ext: 'aar')
}

Step 2. Add the Alan button to the app layout

To add the Alan button to the layout of your app, use the AlanButton class. The AlanButton class provides a view with the voice button and instance methods to communicate with Alan Studio.

In activity_main.xml, create a new AlanButton instance using the following XML layout:

activity_main.xml

<com.alan.alansdk.button.AlanButton
    android:id="@+id/alan_button"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom"
    android:visibility="visible"
    app:button_horizontal_align="right"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"/>

Note

The layout_width param should be set to match_parent.

Step 3. Add the AlanConfig object

You need to add the AlanConfig object to your app. This object describes the parameters that are provided for AlanButton. In the MainActivity.java file (for Android Java apps) or the MainActivity.kt file (for Android Kotlin apps), use AlanConfig.Builder to create a config with the necessary parameters:

Name	Type	Description
projectId	String	The Alan SDK key for a project in Alan Studio.
dialogId	String	(Optional) The dialog ID to connect to the necessary dialog.
dataObject	String or JSONObject	(Optional) A valid JSON string or JSON object with authentication or configuration data to be sent to the voice script. For details, see authData.

Java

MainActivity.java

public class MainActivity extends AppCompatActivity {

  /// Add the alanButton variable
  private AlanButton alanButton;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    /// Set up the Alan button
    AlanConfig config = AlanConfig.builder().setProjectId("").build();
    alanButton = findViewById(R.id.alan_button);
    alanButton.initWithConfig(config);
  }
}

Kotlin

MainActivity.kt

class MainActivity : AppCompatActivity() {

  /// Add the alanButton variable
  private var alanButton: AlanButton? = null

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    /// Set up the Alan button
    val config = AlanConfig.builder().setProjectId("").build()
    alanButton = findViewById(R.id.alan_button)
    alanButton?.initWithConfig(config)
  }
}

Step 4. Connect to the Alan Studio project

As the last step, you need to connect the Android app to the Alan Studio project in which you create voice scripts for the app. In setProjectId of MainActivity, provide the Alan SDK Key for your project in Alan Studio. To get the key, in Alan Studio, at the top of the code editor click Integrations and copy the key value from the Alan SDK Key field.

Java

MainActivity.java

public class MainActivity extends AppCompatActivity {

  private AlanButton alanButton;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    /// Define the project key
    AlanConfig config = AlanConfig.builder().setProjectId("e40fc04e9aff7b4b7d43485dbc3cb44a2e956eca572e1d8b807a3e2338fdd0dc/stage").build();
    alanButton = findViewById(R.id.alan_button);
    alanButton.initWithConfig(config);
  }
}

Kotlin

MainActivity.kt

class MainActivity : AppCompatActivity() {

  private var alanButton: AlanButton? = null

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    /// Define the project key
    val config = AlanConfig.builder().setProjectId("e40fc04e9aff7b4b7d43485dbc3cb44a2e956eca572e1d8b807a3e2338fdd0dc/stage").build()
    alanButton = findViewById(R.id.alan_button)
    alanButton?.initWithConfig(config)
  }
}

Your app is now integrated with Alan. You can now add voice commands to the script in Alan Studio, run the app, tap the Alan button and interact with the app with voice.

Using client API methods

You can use the following client API methods in your app:

• setVisualState()

• callProjectApi()

• playText()

• sendText()

• playCommand()

• activate()

• deactivate()

• isActive()

• getWakewordEnabled()

• setWakewordEnabled()

setVisualState()

Use the setVisualState() method to inform the voice assistant about the app’s visual context. For details, see setVisualState().

Kotlin

Client app

fun setVisualState() {
  /// Providing any params
  val params = JSONObject()
  try {
    params.put("data", "your data")
  } catch (e: JSONException) {
    Log.e("AlanButton", e.message)
  }
  alanButton?.setVisualState(params.toString())
}

Java

Client app

void setVisualState() {
  /// Providing any params
  JSONObject params = new JSONObject();
  try {
    params.put("data","your data");
  } catch (JSONException e) {
    Log.e("AlanButton", e.getMessage());
  }
  alanButton.setVisualState(params.toString());
}

callProjectApi()

Use the callProjectApi() method to send data from the client app to the voice script and trigger activities without voice commands. For details, see callProjectApi().

Voice script

projectAPI.setClientData = function(p, param, callback) {
  console.log(param);
};

Kotlin

Client app

fun callProjectApi() {
  /// Providind any params
  val params = JSONObject()
  try {
    params.put("data", "your data")
  } catch (e: JSONException) {
    Log.e("AlanButton", e.message)
  }
  alanButton?.callProjectApi("script::funcName", params.toString())
}

Java

Client app

void callProjectApi() {
  /// Providing any params
  JSONObject params = new JSONObject();
  try {
    params.put("data","your data");
  } catch (JSONException e) {
    Log.e("AlanButton", e.getMessage());
  }
  alanButton.callProjectApi("script::funcName", params.toString());
}

playText()

Use the playText() method to play specific text in the client app. For details, see playText().

Kotlin

Client app

/// Playing any text message
fun playText() {
  /// Providing text as string param
  alanButton?.playText("Hi")
}

Java

Client app

/// Playing any text message
void playText() {
  /// Providing text as string param
  alanButton.playText("Hi");
}

sendText()

Use the sendText() method to send a text message to Alan as the user’s input. For details, see sendText().

Kotlin

Client app

/// Sending any text message
fun sendText() {
  /// Providing text as string param
  alanButton?.sendText("Hello Alan, can you help me?")
}

Java

Client app

/// Sending any text message
void sendText() {
  /// Providing text as string param
  alanButton.sendText("Hello Alan, can you help me?");
}

playCommand()

Use the playCommand() method to execute a specific command in the client app. For details, see playCommand().

Kotlin

Client app

/// Executing a command locally
fun playCommand() {
  /// Providing any params
  val params = JSONObject()
  try {
    params.put("action", "openSomePage")
  } catch (e: JSONException) {
    e.message?.let { Log.e("AlanButton", it) }
  }
  alanButton?.playCommand(params.toString(), null)
}

Java

Client app

/// Executing a command locally
void playCommand() {
  /// Providing any params
  JSONObject params = new JSONObject();
  try {
    params.put("action","openSomePage");
  } catch (JSONException e) {
    Log.e("AlanButton", e.getMessage());
  }
  alanButton.playCommand(params.toString(), null);
}

activate()

Use the activate() method to activate the Alan button programmatically. For details, see activate().

Kotlin

Client app

/// Activating the Alan button programmatically
fun activate() {
  alanButton?.activate()
}

Java

Client app

/// Activating the Alan button programmatically
void activate() {
  alanButton.activate();
}

deactivate()

Use the deactivate() method to deactivate the Alan button programmatically. For details, see deactivate().

Kotlin

Client app

/// Deactivating the Alan button programmatically
fun deactivate() {
  alanButton?.deactivate()
}

Java

Client app

/// Deactivating the Alan button programmatically
void deactivate() {
  alanButton.deactivate();
}

isActive()

Use the isActive() method to check the Alan button state: active or not. For details, see isActive().

Kotlin

Client app

alanButton?.isActive()

Java

Client app

alanButton.isActive();

getWakewordEnabled()

Use the getWakewordEnabled() method to check the state of the wake word for the Alan button. For details, see getWakewordEnabled().

Kotlin

Client app

var enabled = alanButton?.getWakewordEnabled()

Java

Client app

boolean enabled = alanButton.getWakewordEnabled();

setWakewordEnabled()

Use the setWakewordEnabled() method to enable or disable the wake word for the Alan button. For details, see setWakewordEnabled().

Kotlin

Client app

alanButton?.setWakewordEnabled(true)

Java

Client app

alanButton.setWakewordEnabled(true);

Using handlers

You can use the following Alan handlers in your app:

• onCommand handler

• onButtonState handler

• onEvent handler

onCommand handler

Use the onCommand handler to handle commands sent from the voice script. For details, see onCommand handler.

Kotlin

Client app

val alanCallback: AlanCallback = object : AlanCallback() {
  /// Handle commands from Alan Studio
  override fun onCommand(eventCommand: EventCommand) {
    try {
      val command = eventCommand.data
      val commandName = command.getJSONObject("data").getString("command")
      Log.d("AlanButton", "onCommand: commandName: $commandName")
    } catch (e: JSONException) {
      e.message?.let { Log.e("AlanButton", it) }
    }
  }
};

/// Register callbacks
alanButton?.registerCallback(alanCallback);

Java

Client app

AlanCallback alanCallback = new AlanCallback() {
  /// Handle commands from Alan Studio
  @Override
  public void onCommand(final EventCommand eventCommand) {
    try {
      JSONObject command = eventCommand.getData();
      String commandName = command.getJSONObject("data").getString("command");
      Log.d("AlanButton", "onCommand: commandName: " + commandName);
    } catch (JSONException e) {
      Log.e("AlanButton", e.getMessage());
    }
  }
};

/// Register callbacks
alanButton.registerCallback(alanCallback);

onButtonState handler

Use the onButtonState handler to capture and handle the Alan button state changes. For details, see onButtonState handler.

Kotlin

Client app

val alanCallback: AlanCallback = object : AlanCallback() {

  /// Handle button state
  override fun onButtonState(alanState: AlanState) {
    Log.d("AlanButton", "onButtonState: $alanState")
  }
}

Java

Client app

AlanCallback alanCallback = new AlanCallback() {

  /// Handle button state
  @Override
  public void onButtonState(AlanState alanState) {
    Log.d("AlanButton", "onButtonState: " + alanState);
  }
};

onEvent handler

Use the onEvent handler to capture and handle events emitted by Alan: get user’s utterances, voice assistant responses and so on. For details, see onEvent handler.

Kotlin

Client app

val alanCallback: AlanCallback = object : AlanCallback() {
  /// Handle events
  override fun onEvent(payload: String) {
    try {
      val eventDict = JSONObject(payload)
      Log.d("AlanButton", "onEvent: event: $eventDict")
    } catch (e: JSONException) {
      e.message?.let { Log.e("AlanButton", it) }
    }
  }
}

Java

Client app

AlanCallback alanCallback = new AlanCallback() {
  /// Handle events
  @Override
  public void onEvent(String payload) {
    try {
      JSONObject eventDict = new JSONObject(payload);
      Log.d("AlanButton", "onEvent: event: " + eventDict);
    } catch (JSONException e) {
      Log.e("AlanButton", e.getMessage());
    }
  }
};

Switching between logging levels

You can switch to the extended logging level with a static enableLogging method of the Alan object:

Alan.enableLogging(true);

Troubleshooting

To troubleshoot problems you may have with your Android app, check the solutions below:

• The minimum possible Android SDK version required by the Alan SDK is 21. If the version in your project is lower, you may encounter the following error: AndroidManifest.xml Error: uses-sdk:minSdkVersion 16 cannot be smaller than version 21 declared in library [:alan_voice]. Open the app/build.gradle file, under defaultConfig, locate minSdkVersion and change the version to 21.

• If gradle fails to get all dependencies required by the Alan SDK, you will encounter the following error: Could not find <dependency-name> required by project :app > alan.app:sdk:x.xx.x.

  Make sure jcenter() is added to your project:

  1. In your project, open the settings.gradle file.

  2. Check the repositories list. If jcenter() is not in the list, add it:

     settings.gradle

     dependencyResolutionManagement {
       repositories {
         mavenCentral()
         jcenter()
       }
     }
     

  3. Sync and run your project.

• • (If running the app on an emulator) All virtual microphone options must be enabled. On the emulator settings bar, click More (…) > Microphone and make sure all toggles are set to the On position.

What’s next?

Example apps

Find and explore examples of voice-enabled apps on the Alan AI GitHub repository.

View on GitHub