efunbox-xyyf-mobile-android/app/src/main/java/com/edufound/mobile/util/DeviceUuidFactory.java

package com.edufound.mobile.util;

import android.annotation.SuppressLint;
import android.content.Context;
import android.provider.Settings;
import android.telephony.TelephonyManager;

import java.io.UnsupportedEncodingException;
import java.util.UUID;

public class DeviceUuidFactory {
    public static final String UUID_SPKEY = "uuid";
    protected static UUID uuid;

    public DeviceUuidFactory(Context context) {
        if (uuid == null) {
            synchronized (DeviceUuidFactory.class) {
                if (uuid == null) {
                    try {
                        final String androidId = Settings.Secure.getString(
                                context.getContentResolver(), Settings.Secure.ANDROID_ID);
                        if (!"9774d56d682e549c".equals(androidId)) {
                            uuid = UUID.nameUUIDFromBytes(androidId.getBytes("utf8"));
                        } else {
                            @SuppressLint("MissingPermission") final String deviceId = ((TelephonyManager) context
                                    .getSystemService(Context.TELEPHONY_SERVICE))
                                    .getDeviceId();
                            uuid = deviceId != null ? UUID.nameUUIDFromBytes(deviceId
                                    .getBytes("utf8")) : UUID.randomUUID();
                            try {
                            } catch (Exception e) {
                                e.printStackTrace();
                            }
                        }
                    } catch (UnsupportedEncodingException e) {
                        throw new RuntimeException(e);
                    }
                }
                SPutil.setPrefString(context, UUID_SPKEY, uuid.toString());
            }
        }
    }


    /**
     * @return UUID
     */
    public static UUID getUuid() {
        if (uuid == null || uuid.equals("") || uuid.equals("null")) {
            return null;
        }
        return uuid;
    }
}