public class DeviceIdUtils {


    /**
     * 获取唯一id
     * @param context
     * @return
     */
    public static String getDeviceUUID(Context context) {
        String uuid = loadDeviceUUID(context);
        if (TextUtils.isEmpty(uuid)) {
            uuid = buildDeviceUUID(context);
            saveDeviceUUID(context, uuid);
        }
        return uuid;
    }

    private static String buildDeviceUUID(Context context) {
        String androidId = getAndroidId(context);
        if ("9774d56d682e549c".equals(androidId)) {
            Random random = new Random();
            androidId = Integer.toHexString(random.nextInt())
                    + Integer.toHexString(random.nextInt())
                    + Integer.toHexString(random.nextInt());
        }
        return new UUID(androidId.hashCode(), getBuildInfo().hashCode()).toString();
    }

    private static void saveDeviceUUID(Context context, String uuid) {
        context.getSharedPreferences("device_uuid", Context.MODE_PRIVATE)
                .edit()
                .putString("uuid", uuid)
                .apply();
    }

    @Nullable
    private static String loadDeviceUUID(Context context) {
        return context.getSharedPreferences("device_uuid", Context.MODE_PRIVATE)
                .getString("uuid", null);
    }

    public static String getAndroidId(Context context) {
        return Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID);
    }

    public static String getBuildInfo() {
        //这里选用了几个不会随系统更新而改变的值
        StringBuffer buildSB = new StringBuffer();
        buildSB.append(Build.BRAND).append("/");
        buildSB.append(Build.PRODUCT).append("/");
        buildSB.append(Build.DEVICE).append("/");
        buildSB.append(Build.ID).append("/");
        buildSB.append(Build.VERSION.INCREMENTAL);
        return buildSB.toString();
        //        return Build.FINGERPRINT;
    }
}

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.
使用

DeviceIdUtils.getDeviceUUID(MainActivity.this)

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.

此类非原创。