Example usage for java.util UUID randomUUID

Introduction

In this page you can find the example usage for java.util UUID randomUUID.

Prototype

public static UUID randomUUID()

Source Link

Document

Static factory to retrieve a type 4 (pseudo randomly generated) UUID.

Usage

From source file:Main.java

public static String getDeviceId(Context context) {
    final String PREFS_DEVICE_ID = "prefs_device_id";
    final String PREF_DEVICE_ID = "device_id";
    SharedPreferences sp = context.getSharedPreferences(PREFS_DEVICE_ID, Context.MODE_PRIVATE);
    String deviceId = sp.getString(PREF_DEVICE_ID, null);
    if (deviceId == null) {
        deviceId = UUID.randomUUID().toString();
        sp.edit().putString(PREF_DEVICE_ID, deviceId).apply();
    }/*from w ww .jav a2 s .  c o m*/
    return deviceId;
}

From source file:Main.java

public static boolean saveToSDCard(Bitmap bitmap) {
    if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
        return false;
    }/*from w w w .  ja  v  a 2s .  co m*/
    FileOutputStream fileOutputStream = null;
    File file = new File("/sdcard/myName/Download/");
    if (!file.exists()) {
        file.mkdirs();
    }
    String fileName = UUID.randomUUID().toString() + ".jpg";
    String filePath = "/sdcard/myName/Download/" + fileName;
    File f = new File(filePath);
    if (!f.exists()) {
        try {
            f.createNewFile();
            fileOutputStream = new FileOutputStream(filePath);
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fileOutputStream);
        } catch (IOException e) {
            return false;
        } finally {
            try {
                fileOutputStream.flush();
                fileOutputStream.close();
            } catch (IOException e) {
                return false;
            }
        }
    }
    return true;
}

From source file:Main.java

public static String getUUID() {
    return UUID.randomUUID().toString();
}

From source file:Main.java

public synchronized static String guid(Context context) {
    if (uniqueID == null) {
        SharedPreferences sharedPrefs = context.getSharedPreferences(PREF_UNIQUE_ID, Context.MODE_PRIVATE);
        uniqueID = sharedPrefs.getString(PREF_UNIQUE_ID, null);
        if (uniqueID == null) {
            uniqueID = UUID.randomUUID().toString();
            Editor editor = sharedPrefs.edit();
            editor.putString(PREF_UNIQUE_ID, uniqueID);
            editor.commit();//  w  ww.  ja va  2  s .co m
        }
    }
    return uniqueID;
}

From source file:Main.java

public static Bitmap decodeSampledBitmapFromUrl(String urlpath, long allowedBmpMaxMemorySize) {

    String tmpDir = System.getProperty("java.io.tmpdir", ".");
    File saveFile = new File(tmpDir, UUID.randomUUID().toString());
    if (saveFile.exists()) {
        saveFile.delete();/*from w  ww  . j  a v  a 2s. c om*/
    }
    try {
        saveFile.createNewFile();
        File ret = downloadFile(urlpath, saveFile);
        if (ret == null) {// fail.
            return null;
        }
        Bitmap bmp = decodeSampledBitmapFromPath(saveFile.getAbsolutePath(), allowedBmpMaxMemorySize);
        return bmp;
    } catch (Throwable err) {
        err.printStackTrace();

    } finally {
        if (saveFile.exists()) {
            saveFile.delete();// true.
        }
    }
    return null;
}

From source file:Main.java

public static String upLoad(File file, String RequestURL) {
    String BOUNDER = UUID.randomUUID().toString();
    String PREFIX = "--";
    String END = "/r/n";

    try {/*from w w  w  .j  a v  a  2 s.c o m*/
        URL url = new URL(RequestURL);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setReadTimeout(TIME_OUT);
        connection.setDoInput(true);
        connection.setDoOutput(true);
        connection.setUseCaches(false);
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Charset", CHARSET);
        connection.setRequestProperty("Connection", "Keep-Alive");
        connection.setRequestProperty("Cotent-Type", CONTENT_TYPE + ";boundary=" + BOUNDER);

        if (file != null) {
            OutputStream outputStream = connection.getOutputStream();

            DataOutputStream dataOutputStream = new DataOutputStream(outputStream);
            StringBuffer sb = new StringBuffer();
            sb.append(PREFIX);
            sb.append(BOUNDER + END);
            dataOutputStream.write(sb.toString().getBytes());
            InputStream in = new FileInputStream(file);
            byte[] b = new byte[1024];
            int l = 0;
            while ((l = in.read()) != -1) {
                outputStream.write(b, 0, l);
            }
            in.close();
            dataOutputStream.write(END.getBytes());
            dataOutputStream.write((PREFIX + BOUNDER + PREFIX + END).getBytes());
            dataOutputStream.flush();

            int i = connection.getResponseCode();
            if (i == 200) {
                return SUCCESS;
            }
        }

    } catch (IOException e) {
        e.printStackTrace();
    }
    return FALIURE;

}

From source file:Main.java

public static String createDeliveryId() {
    return UUID.randomUUID().toString().replace("-", "").substring(0, 3);
}

From source file:Main.java

public static String genUUID() {
    return "uuid:" + UUID.randomUUID().toString();
}

From source file:Main.java

protected static String generateUniqueId() {
    return UUID.randomUUID().toString();
}

From source file:Main.java

protected static String generateRandomContainerName() {
    String containerName = "container" + UUID.randomUUID().toString();
    return containerName.replace("-", "");
}