Android SDK Usage

Using Variable Values

To get values from your Features, the variableValue() method is used to fetch variable values using the variable's identifier key coupled with a default value. The default value can be of type String, Boolean, Number, or JSONObject:

Kotlin example:

var strValue: String = devcycleClient.variableValue("str_key", "default")
var boolValue: Boolean = devcycleClient.variableValue("bool_key", false)
var numValue: Number = devcycleClient.variableValue("num_key", 0)
var jsonValue: JSONObject = devcycleClient.variableValue("json_key", JSONObject("{ \"key\": \"value\" }"))

Java example:

String strValue = devcycleClient.variableValue("str_key", "default");
Boolean boolValue = devcycleClient.variableValue("bool_key", false);
Number numValue = devcycleClient.variableValue("num_key", 0);
JSONObject jsonValue = devcycleClient.variableValue("json_key", new JSONObject().put("key", "value"));

If you would like to get the full Variable object using the variable() method it also contains the following params:

• key: the key identifier for the Variable
• type: the type of the Variable, one of: String / Boolean / Number / JSON
• value: the Variable's value
• defaultValue: the Variable's default value
• isDefaulted: if the Variable is using the defaultValue
• evalReason: evaluation reason for why the variable was bucketed into its value

If the value is not ready, it will return the default value passed in the creation of the variable.

Variable Updates

Variable values update whenever identifyUser() or resetUser() are called, or when the project configuration changes (to learn more, visit our Realtime Updates page). To listen for updates, a callback can be registered using the onUpdate() method:

Kotlin example:

var variable: Variable<String> = devcycleClient.variable("str_key", "default")
variable.onUpdate {
    // grab the variable value using it.value
}

Java example:

Variable<String> variable = devcycleClient.variable("str_key", "default");
variable.onUpdate((result) -> {
    // use the new value result.getValue()
    return Unit.INSTANCE;
});

Get All Variables

To get all the Variables returned in the config:

Kotlin example:

var variables: Map<String, BaseConfigVariable>? = devcycleClient.allVariables()

Java example:

Map<String, BaseConfigVariable> variables = devcycleClient.allVariables();

If the SDK has not finished initializing, these methods will return an empty Map.

caution

This method is intended to be used for debugging and analytics purposes, not as a method for retrieving the value of Variables to change code behaviour. For that purpose, we strongly recommend using the individual variable access method described in Using Variable Values Using this method instead will result in no evaluation events being tracked for individual variables, and will not allow the use of other DevCycle features such as Code Usage detection

Get All Features

To grab all the Features returned in the config:

Kotlin example:

var features: Map<String, Feature>? = devcycleClient.allFeatures()

Java example:

Map<String, Feature<Object>> variables = devcycleClient.allFeatures();

If the SDK has not finished initializing, these methods will return an empty Map.

Identifying User

To identify a different user, or the same user passed into the initialize method with more attributes, build a DevCycleUser object and pass it into identifyUser:

Note: If you do not have a user ID, you can use any string at all.

Kotlin example:

var user = DevCycleUser.builder()
                .withUserId("test_user")
                .withEmail("test_user@devcycle.com")
                .withCustomData(mapOf("custom_key" to "value"))
                .build()
devcycleClient.identifyUser(user)

Java example:

DevCycleUser user = DevCycleUser.builder()
                    .withUserId("test_user")
                    .withEmail("test_user@devcycle.com")
                    .withCustomData(Collections.singletonMap("custom_key", "value"))
                    .build();
devcycleClient.identifyUser(user);

To wait on Variables that will be returned from the identify call, you can pass in a DevCycleCallback:

Kotlin example:

devcycleClient.identifyUser(user, object: DevCycleCallback<Map<String, BaseConfigVariable>> {
    override fun onSuccess(result: Map<String, BaseConfigVariable>) {
        // new user configuration loaded successfully from DevCycle
    }

    override fun onError(t: Throwable) {
        // user configuration failed to load from DevCycle, existing user's data will persist.
    }
})

Java example:

devcycleClient.identifyUser(user, new DevCycleCallback<Map<String, BaseConfigVariable>>() {
    @Override
    public void onSuccess(Map<String, BaseConfigVariable> result) {
        // new user configuration loaded successfully from DevCycle
    }

    @Override
    public void onError(@NonNull Throwable t) {
        // user configuration failed to load from DevCycle, existing user's data will persist.
    }
})

If onError is called the user's configuration will not be updated and previous user's data will persist.

Reset User

Calling resetUser will create a new user with an anonymous user_id and then identify as that user.

devcycleClient.resetUser()

Kotlin example:

To wait on the Features of the anonymous user, you can pass in a DevCycleCallback:

devcycleClient.resetUser(object : DevCycleCallback<Map<String, BaseConfigVariable>> {
    override fun onSuccess(result: Map<String, BaseConfigVariable>) {
        // anonymous user configuration loaded successfully from DevCycle
    }

    override fun onError(t: Throwable) {
        // user configuration failed to load from DevCycle, existing user's data will persist.
    }
})

Java example:

devcycleClient.resetUser(new DevCycleCallback<Map<String, BaseConfigVariable>>() {
    @Override
    public void onSuccess(Map<String, BaseConfigVariable> result) {
        // anonymous user configuration loaded successfully from DevCycle
    }

    @Override
    public void onError(@NonNull Throwable t) {
        // user configuration failed to load from DevCycle, existing user's data will persist.
    }
});

If onError is called the user's configuration will not be updated and the previous user's data will persist.

Tracking Events

To send events to DevCycle for metrics purposes, build an event object and then call "track". Note that these events will be periodically queued to be flushed to the DevCycle servers.

Kotlin example:

var event = DevCycleEvent.builder()
                .withType("custom_event_type") //Only Required
                .withTarget("custom_event_target")
                .withValue(BigDecimal(10.0))
                .withMetaData(mapOf("custom_key" to "value"))
                .build()
devcycleClient.track(event)

Java example:

DevCycleEvent event = DevCycleEvent.builder()
        .withType("custom_event_type") //Only Required Field
        .withTarget("custom_event_target")
        .withValue(BigDecimal.valueOf(10.00))
        .withMetaData(Collections.singletonMap("test", "value"))
        .build();
devcycleClient.track(event);

The SDK will flush events every 10s or flushEventsMS specified in the options.

Manually Flushing Events

To manually flush events, call:

devcycleClient.flushEvents()

A callback can be passed to this method to be notified when the method has completed:

Kotlin example:

devcycleClient.flushEvents(object: DevCycleCallback<String> {
    override fun onSuccess(result: String) {
        // The queue was successfully flushed
    }

    override fun onError(t: Throwable) {
        // The queue could not be flushed and a non-recoverable error was thrown
    }
})

Java example:

devcycleClient.flushEvents(new DevCycleCallback<String>() {
    @Override
    public void onSuccess(String result) {
        // The queue was successfully flushed
    }

    @Override
    public void onError(@NonNull Throwable t) {
        // The queue could not be flushed and a non-recoverable error was thrown
    }
});

EdgeDB

EdgeDB allows you to save user data to our EdgeDB storage so that you don't have to pass in all the user data every time you identify a user. Read more about EdgeDB.

To get started, contact us at support@devcycle.com to enable EdgeDB for your project.

Once you have EdgeDB enabled in your project, pass in the enableEdgeDB option to turn on EdgeDB mode for the SDK:

Kotlin example:

var user: DevCycleUser = DevCycleUser.builder()
                    .withUserId("test_user")
                    .withCustomData(mapOf("amountSpent" to 12.23))
                    .build()

let options: DevCycleOptions = DevCycleOptions.builder()
                            .enableEdgeDB(true)
                            .build()

Java example:

DevCycleUser user = DevCycleUser.builder()
                .withUserId("test_user")
                .withCustomData(Collections.singletonMap("amountSpent", 12.23))
                .build();

DevCycleOptions options = DevCycleOptions.builder()
                .enableEdgeDB(true)
                .build();

This will send a request to our EdgeDB API to save the custom data under the user test_user.

In the example, amountSpent is associated to the user test_user. In your next identify call for the same userId, you may omit any of the data you've sent already as it will be pulled from the EdgeDB storage when segmenting to experiments and features.