Android
Chat SDK

V2TIMSDKConfig config = new V2TIMSDKConfig();
V2TIMManager.getInstance().initSDK(
    context, sdkAppID, config
);

V2TIMManager.getInstance().sendC2CTextMessage(
    "See you soon!", recipientID,
    new V2TIMValueCallback<V2TIMMessage>() {
        public void onSuccess(V2TIMMessage message) {
            // Update your sent state.
        }
        public void onError(int code, String desc) {
            // Show the sending error.
        }
    });

V2TIMManager.getInstance().addIMSDKListener(sdkListener);

// When the listener owner is released:
V2TIMManager.getInstance().removeIMSDKListener(sdkListener);