public class SampleApp extends Application {
    private Glog glog;

    @Override
    public void onCreate() {
        super.onCreate();
        // Global initialization, setup internal log level for debug
        Glog.initialize(BuildConfig.DEBUG ? InternalLogLevelDebug : InternalLogLevelInfo);
        setup();
    }

    // initialize instance
    private void setup() {
        glog = new Glog.Builder(getApplicationContext())
                .protoName("glog_identify")         // instance identity, instance with same identity will create only once
                .encryptMode(Glog.EncryptMode.AES)  // Encryption mode
                .key("")                            // ECDH Server public key
                .incrementalArchive(true)           // Incremental archive，log within a day write to same file
                .build();
    }

    // write log
    private void write() {
        byte[] data = serialize();                  // serizlize data
        glog.write(data);                           // write binary data
    } 

    // read log
    private void read() {
        ArrayList<String> logFiles = new ArrayList<>();
        glog.getArchiveSnapshot(logFiles, 10, 100 * 1024); // get snapshot of log files list, flush cache if log num >= 10 or log size >= 100KB in cache
        byte[] inBuffer = new byte[Glog.getSingleLogMaxLength()];
        for (String logFile : logFiles) {
            try (Glog.Reader reader = glog.openReader(logFile)) {
                while (true) {
                    int n = reader.read(inBuffer);
                    if (n < 0) {
                        break;
                    } else if (n == 0) { // fault-tolerant
                        continue;
                    }
                    byte[] outBuffer = new byte[n];
                    System.arraycopy(inBuffer, 0, outBuffer, 0, n);
                    deserialize(outBuffer); // deserialize binary data
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

}