<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/self_driving_wait_ll" android:layout_width="match_parent" android:layout_height="match_parent"> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:orientation="vertical"> <TextView  android:id="@+id/tv_time"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_centerInParent="true"  android:layout_marginTop="20.0dp"  android:gravity="center_horizontal"  android:text="00:00:00"  android:textSize="88.0sp" /> </LinearLayout></RelativeLayout>

public class TimeActivity extends AppCompatActivity { public static String TIME_CHANGED_ACTION = "com.yy.time.TIME_CHANGED_ACTION"; public static TextView tv_time; private SharedPreferencesUtil util; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_time); tv_time= (TextView) findViewById(R.id.tv_time); util=new SharedPreferencesUtil(this); util.saveString(MyContant.STARTTIME, StringUtils.gettime()); startService(new Intent(this, TimeService.class)); }}

public class TimeService extends Service {private String TAG = "TimeService";private Timer timer = null;private Intent timeIntent = null;private SharedPreferencesUtil util;@Overridepublic void onCreate() { super.onCreate(); Log.i(TAG,"TimeService->onCreate"); //初始化 this.init(); //定時器發送廣播 timer.schedule(new TimerTask() { @Override public void run() {  //發送廣播  sendTimeChangedBroadcast(); } }, 1000,1000);}@Overridepublic IBinder onBind(Intent intent) { Log.i(TAG,"TimeService->onBind"); return null;}/** * 相關變量初始化 */private void init(){ util=new SharedPreferencesUtil(this); timer = new Timer(); timeIntent = new Intent();}/** * 發送廣播，通知UI層時間已改變 */private void sendTimeChangedBroadcast(){ try { timeIntent.putExtra("time",getTime()); timeIntent.setAction(TimeActivity.TIME_CHANGED_ACTION); //發送廣播，通知UI層時間改變了 sendBroadcast(timeIntent); } catch (ParseException e) { e.printStackTrace(); }}/** * 獲取最新時間 * @return */private String getTime() throws ParseException { String time; time=getsubtract(util.readString(MyContant.STARTTIME)); return time;}//時間相減 得到計時時間public String getsubtract(String starttime) throws ParseException { SimpleDateFormat myFormatter = new SimpleDateFormat( "hh:mm:ss"); String newtime= StringUtils.gettime(); Date date= myFormatter.parse(newtime); Date mydate= myFormatter.parse(starttime); int sec= (int) ((date.getTime()-mydate.getTime())/1000); int min=sec/60; int hour=min/60; if (sec >= 60) { sec = (sec % 60); } if (min >= 60) { min = (min % 60); } String hString; String mString; String string; if (hour < 10) { hString = "0" + String.valueOf(hour); } else { hString = String.valueOf(hour); } if (min < 10) { mString = "0" + String.valueOf(min); } else { mString = String.valueOf(min); } if (sec < 10) { string = "0" + String.valueOf(sec); } else { string = String.valueOf(sec); } return hString + ":" + mString + ":" + string;}@Overridepublic ComponentName startService(Intent service) { Log.i(TAG,"TimeService->startService"); return super.startService(service);}@Overridepublic void onDestroy() { super.onDestroy(); Log.i(TAG,"TimeService->onDestroy");}}

public class UITimeReceiver extends BroadcastReceiver {private TimeActivity dUIActivity = new TimeActivity();@Overridepublic void onReceive(Context context, Intent intent) { String action = intent.getAction(); if(TimeActivity.TIME_CHANGED_ACTION.equals(action)){ String strtime = intent.getStringExtra("time"); //此處實現不夠優雅，為了在UITimeReceiver中使用DynamicUIActivity中的TextView組件time，而將其設置為public類型， //更好的實現是將UITimeReceiver作為DynamicUIActivity的內部類 dUIActivity.tv_time.setText(strtime); }}}

 <service android:name=".Service.TimeService"/> <receiver android:name=".Service.UITimeReceiver"> <intent-filter>  <action android:name="com.yy.time.TIME_CHANGED_ACTION"/> </intent-filter> </receiver>