18. Big Data Transfer Functionality

A big data transfer feature designed to facilitate large data interactions without file operations. It includes sub-functions such as receiving big data from the device, sending big data, and reading big data.

18.1. Receiving Big Data from Device

//Step0. WatchManager is a subclass of WatchOpImpl, must configure sdk in 1.3
WatchManager mWatchManager = WatchManager.getInstance();
final OnWatchCallback onWatchCallback = new OnWatchCallback() {
    /**
     * Callback for received big data
     * @param device Device object
     * @param type   Data type
     * @param data   Big data
     */
    @Override
    public void onReceiveBigData(BluetoothDevice device, int type, byte[] data) {
        super.onReceiveBigData(device, type, data);
    }

    /**
     * Exception occurred during receiving big data
     *
     * @param device Device object
     * @param error  Error event
     */
    @Override
    public void onBigDataError(BluetoothDevice device, BaseError error) {
        super.onBigDataError(device, error);
    }
};
//Step1. Register event listener
mWatchManager.registerOnWatchCallback(onWatchCallback);

//StepN. When no longer needing to monitor big data, remember to remove the listener
mWatchManager.unregisterOnWatchCallback(onWatchCallback);

Note

Data types, Big Data Type Reference Table

18.2. Sending Big Data

//Step0. WatchManager is a subclass of WatchOpImpl, must configure sdk in 1.3
WatchManager mWatchManager = WatchManager.getInstance();
//Step1. Build send parameters
int type = RcspConstant.TYPE_RAW_DATA; //Raw data
int version = 0; //Data protocol
int sendLimit = 4 * 1024; //Maximum value for each data transmission
int recvLimit = 4 * 1024; //Maximum value for each data reception
byte[] data = new byte[1024]; //Big data to send
SendParams param = new SendParams(type, version, sendLimit, recvLimit, data);
//Step2. Call send big data interface and wait for callback.
//Note: The big data interface cannot be called multiple times, need to wait for callback to finish before continuing to call
mWatchManager.sendLargeData(param, new OnDataEventCallback() {
    /**
     * Callback for operation start
     * @param way Transmission method
     *            <p>{@link RcspConstant#WAY_SEND_DATA} -- Send data
     *            {@link RcspConstant#WAY_READ_DATA} -- Read data</p>
     */
    @Override
    public void onBegin(int way) {

    }

    /**
     * Callback for progress
     * @param progress Progress
     */
    @Override
    public void onProgress(float progress) {

    }

    /**
     * Callback for operation end
     * @param type Data type
     * @param data Data
     */
    @Override
    public void onStop(int type, byte[] data) {

    }

    /**
     * Callback for exception
     * @param error Error information
     */
    @Override
    public void onError(BaseError error) {

    }
});

Note

Data types, Big Data Type Reference Table

18.3. Big Data Type Reference Table

Referenced Class Name: DataTransferCmd

Value	Constant Reference	Description
0	TYPE_RAW_DATA	Raw data/transparent data
1	TYPE_ALI_DATA	Alibaba Cloud data
2	TYPE_RTC_DATA	Alarm clock data
3	TYPE_AI_CLOUD_DATA	AI cloud data
4	TYPE_TTS_DATA	Text-to-speech data
5	TYPE_PLATFORM_INTERFACE_DATA	Third-party platform authentication data
6	TYPE_ESIM_CARD	ESim card data
7	TYPE_NETWORK_OTA	Network module upgrade data
8	TYPE_TONE_FILE_DATA	Tone file data