我在处理一个应用程序，我正在创建一个能够在后台执行一些操作的服务。当我从最近打开的应用程序中清除我的应用程序时，这个服务会停止运行。我希望即使我清除了应用程序，我的服务仍然可以在后台运行。我正在使用小米Mi4i设备测试我的应用程序。
这是我的服务类：
public class LocalNotificationService extends Service {
private int i = 1;
public static final String TAG = LocalNotificationService.class.getSimpleName();
private static long UPDATE_INTERVAL = 1 * 5 * 1000; //default
private static Timer timer = new Timer();
private static final String TIME_FORMAT_LOCAL_NOTIFICATION = "HH:mm";
private boolean isNotificationFired = false;
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return START_STICKY;
}
@Override
public void onCreate() {
super.onCreate();
_startService();
startForeground(1,new Notification());
Log.v(TAG, "service created....");
}
private void _startService() {
timer.scheduleAtFixedRate(
new TimerTask() {
public void run() {
doServiceWork();
}
}, 1000, UPDATE_INTERVAL);
}
private void doServiceWork() {
Log.v(TAG, "service working....");
try {
new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... params) {
String dateString = null;
try {
String format = "yyyy-MM-dd";
final SimpleDateFormat sdf = new SimpleDateFormat(format);
dateString = sdf.format(new Date()) + "T00:00:00";
Log.v(TAG, dateString);
} catch (Exception e) {
e.printStackTrace();
}
List<AppointmentModel> list = new RushSearch().whereEqual("Date", dateString).find(AppointmentModel.class);
if (list != null & list.size() > 0) {
for (AppointmentModel model : list) {
try {
if (model.Status.equalsIgnoreCase("Confirmed")) {
SimpleDateFormat sdf = new SimpleDateFormat(LocalNotificationService.TIME_FORMAT_LOCAL_NOTIFICATION);
Date currentTime = sdf.parse(sdf.format(Calendar.getInstance().getTime()));
String From = DateAndTimeUtil.getTimeLocale_HHmm(model.FromTime);
Date FromTime = sdf.parse(From);
long difference = currentTime.getTime() - FromTime.getTime();
int days = (int) (difference / (1000 * 60 * 60 * 24));
int hours = (int) ((difference - (1000 * 60 * 60 * 24 * days)) / (1000 * 60 * 60));
int min = (int) (difference - (1000 * 60 * 60 * 24 * days) - (1000 * 60 * 60 * hours)) / (1000 * 60);
hours = (hours < 0 ? -hours : hours);
Log.v("======= days", " :: " + days);
Log.v("======= hours", " :: " + hours);
Log.v("======= min", " :: " + min);
switch (min){
case -15: {
if(!isNotificationFired){
Bundle bundle = new Bundle();
bundle.putString(ArkaaNotificationHandler.NOTIFICATION_KEY_FROM, "Appointment Reminder");
bundle.putString(ArkaaNotificationHandler.NOTIFICATION_KEY_TITLE, "Appointment Reminder");
bundle.putString(ArkaaNotificationHandler.NOTIFICATION_KEY_MESSAGE, "You Have Appointment With " + model.Doctor.Name + "At " + DateAndTimeUtil.getTimeLocale_HHmmaa(From));
bundle.putString(ArkaaNotificationHandler.NOTIFICATION_KEY_COLLAPSE_KEY, "");
ArkaaNotificationHandler.getInstance(LocalNotificationService.this).createSimpleNotification(LocalNotificationService.this, bundle);
isNotificationFired = true;
}
break;
}
case -5: {
if(!isNotificationFired){
Bundle bundle = new Bundle();
bundle.putString(ArkaaNotificationHandler.NOTIFICATION_KEY_FROM, "");
bundle.putString(ArkaaNotificationHandler.NOTIFICATION_KEY_COLLAPSE_KEY, "");
bundle.putString(ArkaaNotificationHandler.NOTIFICATION_KEY_MESSAGE, "You Have Appointment With" + model.Doctor.Name + "At" + DateAndTimeUtil.getTimeLocale_HHmmaa(From));
if(NetworkUtils.getNetworkClass(ArkaaApplicationClass.getInstance().getBaseContext()).equalsIgnoreCase("2G")){
bundle.putString(ArkaaNotificationHandler.NOTIFICATION_KEY_TITLE, "For Better Call Experience Please Switch To High BandWidth Network ");
}else{
bundle.putString(ArkaaNotificationHandler.NOTIFICATION_KEY_TITLE, "Appointment Reminder");
}
ArkaaNotificationHandler.getInstance(LocalNotificationService.this).createSimpleNotification(LocalNotificationService.this, bundle);
isNotificationFired = true;
}
}
case -4:
case -14:
isNotificationFired = false;
break;
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
return null;
}
}.execute();
} catch (Exception e) {
Log.v(TAG, e.toString());
}
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onTaskRemoved(Intent rootIntent) {
stopSelf();
}
private void _shutdownService() {
if (timer != null) timer.cancel();
Log.i(getClass().getSimpleName(), "Timer stopped...");
}
@Override
public void onDestroy() {
super.onDestroy();
_shutdownService();
Log.v(TAG, "service destroyed.....");
// if (MAIN_ACTIVITY != null) Log.d(getClass().getSimpleName(), "FileScannerService stopped");
}
}
onStartCommand(...)函数中返回START_STICKY。 - Neo