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Chat SDKs for Android#

With CONTUS MirrorFly Chat SDK for Android, you can efficiently integrate the desired real-time chat features into a client app.

When it comes to the client-side implementation, you can initialize and configure the chat with minimal efforts. With the server-side, MirrorFly ensures reliable infra-management services for the chat within the app. This page will let you know how to install the chat SDK in your app.

Note : If you're looking for the fastest way in action with CONTUS MirrorFly Chat SDKs, then you need to build your app on top of our sample version. Simply download the sample app and commence your app development. To download sample app click here


The requirements for chat SDK for Android are:

  • Android Lollipop 5.0 (API Level 21) or above
  • Java 7 or higher
  • Gradle 4.1.0 or higher

Things to be Noted Before Making a Start#

SDK License Key#

Before integrating CONTUS MirrorFly Chat SDK, you need to have a SDK license key for your MirrorFly application. This SDK needs to be authenticated by the MirrorFly server using the license key for further processing.

Follow the below steps to get your license key:

Step 1: Let’s Create an Account - Sign up into MirrorFly Console page (https://console.mirrorfly.com/register) for free MirrorFly account

Step 2: Create an account with your basic details including your name, organization details, work email, and contact number

Step 3: Once you’re in! You get access to your MirrorFly account ‘Overview page’ where you can find a license key as well as downloadable Android SDK for further integration process

Step 4: You can copy the license key from the ‘Application info’ section


Step 5: To download the AAR files from the Android SDKs, click on ‘Download’ which will take you to the top of the guided documentation page, here, click on the ‘Download button’ and extract the AAR files from the ZIP folder

Step 6: Once finished with the download, now it's time to start with the integration process that begins with creating a new project to develop a chat app.

Integrate the Chat SDK#

As soon as the AAR files have been imported from the zip file using Kotlin, you can start over with the integration process.

Step 1: Create a new project or Open an existing project in Android Studio

Step 2: Add the following libraries in app/libs folder in the project

  • appbase.aar
  • flycommons.aar
  • flynetwork.aar
  • flydatabase.aar
  • videocompression.aar
  • xmpp.aar


Step 3: Add the below code in the app/build.gradle file.

plugins {
id 'kotlin-android'
id 'kotlin-kapt'
android {
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
kotlinOptions {
jvmTarget = '1.8'
packagingOptions {
exclude 'META-INF/AL2.0'
exclude 'META-INF/LICENSE.txt'
exclude 'META-INF/license.txt'
exclude 'META-INF/NOTICE.txt'
exclude 'META-INF/notice.txt'
exclude 'META-INF/ASL2.0'
exclude 'META-INF/LGPL2.1'

Step 4: Add the following dependencies in the app/build.gradle file.

dependencies {
... // your app dependencies
implementation files('libs/appbase.aar')
implementation files('libs/flycommons.aar')
implementation files('libs/flynetwork.aar')
implementation files('libs/flydatabase.aar')
implementation files('libs/videocompression.aar')
implementation files('libs/xmpp.aar')


Step 5: Add the below dependencies required by the SDK in the app/build.gradle file.

dependencies {
... // your app dependencies
configurations {
all {
exclude group: 'org.json', module: 'json'
exclude group: 'xpp3', module: 'xpp3'
//For lifecycle listener
implementation 'android.arch.lifecycle:extensions:1.1.1'
annotationProcessor 'android.arch.lifecycle:compiler:1.1.1'
//For GreenDao
implementation 'de.greenrobot:greendao:2.1.0'
//For gson parsing
implementation 'com.google.code.gson:gson:2.8.1'
//for smack implementation
implementation 'org.igniterealtime.smack:smack-android:4.4.4'
implementation 'org.igniterealtime.smack:smack-tcp:4.4.4'
implementation 'org.igniterealtime.smack:smack-im:4.4.4'
implementation 'org.igniterealtime.smack:smack-extensions:4.4.4'
implementation 'org.igniterealtime.smack:smack-sasl-provided:4.4.4'
implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.0.0'
implementation 'androidx.multidex:multidex:2.0.1'
implementation 'com.google.android.gms:play-services-location:17.0.0'
//Dagger Dependencies
api 'com.google.dagger:dagger:2.40.5'
kapt 'com.google.dagger:dagger-compiler:2.40.5'
api 'com.google.dagger:dagger-android:2.40.5'
api 'com.google.dagger:dagger-android-support:2.40.5'
kapt 'com.google.dagger:dagger-android-processor:2.40.5'
implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.3'
implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-test:1.3.3'
implementation 'com.squareup.retrofit2:retrofit:2.6.1'
implementation 'com.squareup.retrofit2:converter-gson:2.6.1'
implementation 'com.squareup.okhttp3:okhttp:4.2.0'
implementation 'com.jakewharton.retrofit:retrofit2-kotlin-coroutines-adapter:0.9.2'
//stetho interceptor
implementation 'com.facebook.stetho:stetho-okhttp3:1.3.1'
//okhttp interceptor
implementation 'com.squareup.okhttp3:logging-interceptor:3.14.3'
//shared preference encryption
implementation 'androidx.security:security-crypto:1.1.0-alpha03'

Step 6: Add the below line in the gradle.properties file, to avoid imported library conflicts.


Step 7: Open the AndroidManifest.xml and add below permissions.

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

Configure in app/build.gradle file#

buildTypes {
debug {
buildConfigField 'String', 'SDK_BASE_URL', '"https://api-preprod-sandbox.mirrorfly.com/api/v1/"'
buildConfigField 'String', 'LICENSE', '"xxxxxxxxxxxxxxxxxxxxxxxxx"'
buildConfigField 'String', 'WEB_CHAT_LOGIN', '"https://webchat-preprod-sandbox.mirrorfly.com/"'
buildConfigField "String", "SUPPORT_MAIL", '"contussupport@gmail.com"'

Initialize Chat SDK#

To start using the sdk, there is a need for some basic requirements before proceeding with the initialization process. Thus, the ChatSDK builder class is used to provide the necessary data to the SDK. In your Application class, inside the onCreate() method use the below ChatSDK Builder to provide the necessary data.


//For chat logging

Chat Builder Function Description#

FunctionParameter TypeDescription
setDomainBaseUrlStringUrl is provided to make API calls
setLicenseKeyStringLicense key is required to proceed with registration
setIsTrialLicenceKeybooleanIf the provided license key is for trial version, display the text as ‘true’ else ‘false’
buildn/aInitializes the chat configuration

The base URL must have the Http/Https protocol which must be closed with a ‘slash (/)’, if not an exception - a bug message will pop up.


The below method to register a user in sandbox Live mode based on setIsTrialLicenceKey provided.


Unless you log out the session, make a note that should never call the registration method more than once in an application

Note: While registration, the below registerUser method will accept the FCM_TOKEN as an optional param and pass it across.

FlyCore.registerUser(USER_IDENTIFIER, (isSuccess, throwable, data ) -> {
if(isSuccess) {
JSONObject responseObject = (JSONObject) data.get("data");
// Get Username and password from the object
} else {
// Register user failed print throwable to find the exception details.
USER_IDENTIFIERStringA unique Id to Register the User
FCM_TOKENStringA registration token that is generated by FCM SDK for the user's app instance to send message for free
CALLBACKFlyCallbackFlyCallback is used as a callback, implemented and expressed as lambda expression for easy reading

Connect to the Chat Server#

In order to send messages using the Chat SDK, at first you need to establish the connection to the server. SDK provides methods for initialize the chat connection.

Note: The ChatManager.connect() method should be called only once in an application. SDK will handle the chat server connection and disconnection automatically.

ChatManager.connect(new ChatConnectionListener() {
public void onConnected() {
// Write your success logic here to navigate Profile Page or
// To Start your one-one chat with your friends
public void onDisconnected() {
// Connection disconnected
//No need implementations
public void onConnectionNotAuthorized() {
// Connection Not authorized
//No need implementations
CALLBACKChatConnectionListenercallback listener for chat connection


Some of the most common terminologies used in Chat SDK with description

userID/userBareIDUnique ID assigned for each user Ex: 12345678 (any alphanumeric). The below characters is not allowed in userId: U+0022 (") U+0026 (&) U+0027 (') U+002F (/) U+003A (:) U+003C (<) U+003E (>) U+0040 (@) userID should follow below specification: https://xmpp.org/extensions/xep-0106.html
userJid (or) JIDuserID+@+domain of the chat server Ex. 12345678@xmpp.chatsystem.dev.contus.us
groupID/groupBareIDUnique ID assigned for each group Ex: group123456 (any alphanumeric). GroupJID = groupID +@mix.+domain of the chat server Ex: group123456@mix.xmpp.mirrorfly.dev.contus.us`

SDK will have built-in functions to prepare the JID, Group JID, and more.

Send a One-to-One Message#

Use the below method to send a text message to other user,

Note: To generate a unique user id, you must call the other user's username method String userJID = FlyUtils.getJid(USERNAME)

FlyMessenger.sendTextMessage(TO_JID, TEXT, new SendMessageListener() {
public void onResponse(boolean isSuccess, @Nullable ChatMessage chatMessage) {
// you will get the message sent success response
TO_JIDStringJID of the end user
TEXTStringIndicates the text message that needs to be sent
REPLY_MESSAGE_IDStringSpecifies the Message ID of replied message
CALLBACKSendMessageListenercallback to observe the action status

Receive a One-to-One Message#

You can extend the FlyBaseActivity from SDK into your app BaseActivity, and observe all the incoming messages and other feature listeners.

public class MainActivity extends FlyBaseActivity { }

Moreover, here the listeners would be called only when a new message is received from other user. To get more details please visit this callback listeners

public void onMessageReceived(@NonNull ChatMessage message) {
// received message object