实现在设备上更通用的获取设备唯一标识

DeviceUuidFactory.java

package com.benli.app.utils;

import android.content.Context;
import android.content.SharedPreferences;
import android.provider.Settings.Secure;
import android.telephony.TelephonyManager;
import android.util.Log;

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

/**
 * @ClassName: DeviceUuidFactory
 * @Description: 
 *               实现在设备上更通用的获取设备唯一标识(为每个设备产生唯一的UUID，以ANDROID_ID为基础，在获取失败时以TelephonyManager
 *               .getDeviceId()为备选方法，如果再失败，使用UUID的生成策略。 重申下，以下方法是生成Device
 *               ID，在大多数情况下Installtion ID能够满足我们的需求，但是如果确实需要用到Device ID)
 * @date 2013-10-8 下午12:14:09
 * @Version 1.0
 */
public class DeviceUuidFactory {
    protected static final String PREFS_FILE = "device_id";

    protected static final String PREFS_DEVICE_ID = "device_id";

    protected static UUID uuid;

    private static String deviceType = "0";

    private static final String TYPE_ANDROID_ID = "1";

    private static final String TYPE_DEVICE_ID = "2";

    private static final String TYPE_RANDOM_UUID = "3";

    public DeviceUuidFactory(Context context) {
        if (uuid == null) {
            synchronized (DeviceUuidFactory.class) {
                if (uuid == null) {
                    final SharedPreferences prefs = context.getSharedPreferences(PREFS_FILE, 0);
                    final String id = prefs.getString(PREFS_DEVICE_ID, null);
                    if (id != null) {
                        uuid = UUID.fromString(id);
                    } else {
                        final String androidId = Secure.getString(context.getContentResolver(),
                                Secure.ANDROID_ID);
                        try {
                            if (!"9774d56d682e549c".equals(androidId)) {
                                deviceType = TYPE_ANDROID_ID;
                                uuid = UUID.nameUUIDFromBytes(androidId.getBytes("utf8"));
                            } else {
                                final String deviceId = ((TelephonyManager) context
                                        .getSystemService(Context.TELEPHONY_SERVICE)).getDeviceId();
                                if (deviceId != null
                                        && !"0123456789abcdef".equals(deviceId.toLowerCase())
                                        && !"000000000000000".equals(deviceId.toLowerCase())) {
                                    deviceType = TYPE_DEVICE_ID;
                                    uuid = UUID.nameUUIDFromBytes(deviceId.getBytes("utf8"));
                                } else {
                                    deviceType = TYPE_RANDOM_UUID;
                                    uuid = UUID.randomUUID();
                                }
                            }
                        } catch (UnsupportedEncodingException e) {
                            deviceType = TYPE_RANDOM_UUID;
                            uuid = UUID.randomUUID();
                        }finally {
                            uuid = UUID.fromString(deviceType + uuid.toString());
                        }

                        prefs.edit().putString(PREFS_DEVICE_ID, uuid.toString())
                                .commit();
                    }
                }
            }
        }
    }

    public UUID getDeviceUuid() {
        Log.d("DeviceUuidFactory", "------>获取的设备ID号为：" + uuid.toString());
        return uuid;
    }
}