此方法针对于无法自动获取网络时间的特殊设备，正常 Android 设备直接调用

System.currentTimeMillis();

 方法获取当前时间即可。

TimeService 集成于 Service，实现与主Activity 的生命周期绑定。

 

TimeService 代码

public class TimeService extends Service {    private TimeService mContext;    private Timer mTimer;//定时器    private long currentTimeMillis = 0;//当前时间    private static final long UPDATE_TIME_OFFSET = 1 * 1000;//自动更新间隔    private CheckTimeTask checkTimeTask;    private UpdateTimeTask updateTimeTask;    //需用内部类继承Binder,并定义方法获取Service对象    private final IBinder binder = new TimeBinder();    //外部调用，获取当前时间    public long getCurrentTimeMillis() {        return currentTimeMillis;    }    //初始化服务时间    public void setCurrentTimeMillis(String dateStr) {        if (StringUtil.isNullOrEmpty(dateStr)) {            return;        }        try {            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");            Date date = sdf.parse(dateStr);            currentTimeMillis = date.getTime();        } catch (ParseException e) {            e.printStackTrace();        }    }    public class TimeBinder extends Binder {        public TimeService getService() {            return mContext;        }    }    @Nullable    @Override    public IBinder onBind(Intent intent) {        return binder;    }    @Override    public void onCreate() {        super.onCreate();        mContext = this;        initData();    }    private void initData() {        mTimer = new Timer();        checkTimeTask = new CheckTimeTask();        updateTimeTask = new UpdateTimeTask(UPDATE_TIME_OFFSET);        mTimer.schedule(checkTimeTask, 1000, 5 * 60 * 1000);//每5分钟更新一次网络时间        mTimer.schedule(updateTimeTask, 0, UPDATE_TIME_OFFSET);    }    @Override    public void onDestroy() {        super.onDestroy();        if (mTimer != null) {            mTimer.cancel();            mTimer = null;        }        if (checkTimeTask != null) {            checkTimeTask.cancel();            checkTimeTask = null;        }        if (updateTimeTask != null) {            updateTimeTask.cancel();            updateTimeTask = null;        }    }    /**     * 获取服务器时间     */    private class CheckTimeTask extends TimerTask {        @Override        public void run() {         //=========此处为获取网络时间请求========         //===============================            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");            if (bean != null ) {                String dateStr = bean;                try {                    Date date = sdf.parse(dateStr);                    currentTimeMillis = date.getTime();                } catch (ParseException e) {                    e.printStackTrace();                }            }        }    }    /**     * 定时更新当前时间     */    private class UpdateTimeTask extends TimerTask {        /**         * 更新时间间隔         */        private long offset = 0;        public UpdateTimeTask(long offset) {            this.offset = offset;        }        @Override        public void run() {            currentTimeMillis += offset;        }    }}