Question

我创建了class，它扩展了AsyncTask，以与服务同步。同步完成后，我想将时间（hh：mm）放入TextView中，以通知用户上次同步的时间。我在onPostExecute()里面做。
问题是这种情况只会发生一次。 TextView稍后不会更新。
我很确定会调用doInBackground()，因为就像应用程序启动时（需要很多记录）一样，同步需要花费很长时间，但是我不确定100％，因为数据收集不会根本没有改变。
那是我的AsyncTask课：

private class Reconnect extends AsyncTask<String, Void, Void>{

        private RotateAnimation anim = new RotateAnimation(0f, 360f, Animation.RELATIVE_TO_SELF,0.5f, Animation.RELATIVE_TO_SELF,0.5f);

        @Override
        protected void onPreExecute() {
            rlRefresh.setEnabled(false);
            anim.setInterpolator(new LinearInterpolator());
            anim.setRepeatCount(Animation.INFINITE);
            anim.setDuration(700);
            refreshIV.startAnimation(anim);
        }



        @Override
        protected Void doInBackground(String... strings) {
            retrofit2.Call<List<ServiceTaskAxapta>> call = api.getTasks("1", strings[0]);
            retrofit2.Response<List<ServiceTaskAxapta>> response = null;
            try {
                response = call.execute();
            } catch (IOException e) {
                e.printStackTrace();
            }

            if(response.code() != 200){
                Toast.makeText(context, "Error 1", Toast.LENGTH_SHORT).show();
            } else {

                for (int i = 0; i < response.body().size(); i++){
                    String endTime = DateParser.increaseTimeString(response.body().get(i).getReportTime(), 8, 0, false, null, null, null);

                    allTasksDB.insertIntoDB(response.body().get(i).getTaskID(), "path", response.body().get(i).getStreet(), response.body().get(i).getCity(), response.body().get(i).getPhoneNumber(),
                            response.body().get(i).getCompanyName(), Integer.parseInt(response.body().get(i).getReportDay()), Integer.parseInt(response.body().get(i).getReportMonth()),
                            Integer.parseInt(response.body().get(i).getReportYear()), Integer.parseInt(response.body().get(i).getDeadlineDay()), Integer.parseInt(response.body().get(i).getDeadlineMonth()),
                            Integer.parseInt(response.body().get(i).getDeadlineYear()), response.body().get(i).getReportTime(), endTime);
                }

            }

            call = api.getTasks("2", strings[0]);
            response = null;
            try {
                response = call.execute();
            } catch (IOException e) {
                e.printStackTrace();
            }

            if(response.code() != 200){
                Toast.makeText(context, "Error 2", Toast.LENGTH_SHORT).show();
            } else {
                for (int i = 0; i < response.body().size(); i++){
                    String endTime = DateParser.increaseTimeString(response.body().get(i).getStartTimeMax(), 24, 0,false, null, null, null);

                    acceptedTasksDB.insertIntoDB(response.body().get(i).getTaskID(), "path", response.body().get(i).getStreet(), response.body().get(i).getCity(), response.body().get(i).getPhoneNumber(),
                            response.body().get(i).getCompanyName(), Integer.parseInt(response.body().get(i).getDeadlineDay()), Integer.parseInt(response.body().get(i).getDeadlineMonth()),
                            Integer.parseInt(response.body().get(i).getDeadlineYear()), Integer.parseInt(response.body().get(i).getAcceptedDay()), Integer.parseInt(response.body().get(i).getAcceptedMonth()),
                            Integer.parseInt(response.body().get(i).getAcceptedYear()), response.body().get(i).getStartTime(), endTime, response.body().get(i).getStartTimeMax(), false, false,
                            null, null);
                }
            }

            call = api.getTasks("3", strings[0]);
            response = null;
            try {
                response = call.execute();
            } catch (IOException e) {
                e.printStackTrace();
            }

            if(response.code() != 200){
                Toast.makeText(context, "Error 3", Toast.LENGTH_SHORT).show();
            } else {
                for (int i = 0; i < response.body().size(); i++){

                    acceptedTasksDB.insertIntoDB(response.body().get(i).getTaskID(), "path", response.body().get(i).getStreet(), response.body().get(i).getCity(), response.body().get(i).getPhoneNumber(),
                            response.body().get(i).getCompanyName(), Integer.parseInt(response.body().get(i).getDeadlineDay()), Integer.parseInt(response.body().get(i).getDeadlineMonth()),
                            Integer.parseInt(response.body().get(i).getDeadlineYear()), Integer.parseInt(response.body().get(i).getAcceptedDay()), Integer.parseInt(response.body().get(i).getAcceptedMonth()),
                            Integer.parseInt(response.body().get(i).getAcceptedYear()), response.body().get(i).getStartTime(), null, response.body().get(i).getStartTimeMax(), true, false,
                            null, null);
                }
            }

            call = api.getTasks("4", strings[0]);
            response = null;
            try {
                response = call.execute();
            } catch (IOException e) {
                e.printStackTrace();
            }

            if(response.code() != 200){
                Toast.makeText(context, "Error 4", Toast.LENGTH_SHORT).show();
            } else {
                for (int i = 0; i < response.body().size(); i++){

                    acceptedTasksDB.insertIntoDB(response.body().get(i).getTaskID(), "path", response.body().get(i).getStreet(), response.body().get(i).getCity(), response.body().get(i).getPhoneNumber(),
                            response.body().get(i).getCompanyName(), Integer.parseInt(response.body().get(i).getDeadlineDay()), Integer.parseInt(response.body().get(i).getDeadlineMonth()),
                            Integer.parseInt(response.body().get(i).getDeadlineYear()), Integer.parseInt(response.body().get(i).getAcceptedDay()), Integer.parseInt(response.body().get(i).getAcceptedMonth()),
                            Integer.parseInt(response.body().get(i).getAcceptedYear()), response.body().get(i).getStartTime(), null, response.body().get(i).getStartTimeMax(), true, true,
                            null, null);
                }
            }

            call = api.getTasks("5", strings[0]);
            response = null;
            try {
                response = call.execute();
            } catch (IOException e) {
                e.printStackTrace();
            }

            if(response.code() != 200){
                Toast.makeText(context, "Error 5", Toast.LENGTH_SHORT).show();
            } else {
                dbConnectionProblems.open();
                for (int i = 0; i < response.body().size(); i++){

                    acceptedTasksDB.insertIntoDB(response.body().get(i).getTaskID(), "path", response.body().get(i).getStreet(), response.body().get(i).getCity(), response.body().get(i).getPhoneNumber(),
                            response.body().get(i).getCompanyName(), Integer.parseInt(response.body().get(i).getDeadlineDay()), Integer.parseInt(response.body().get(i).getDeadlineMonth()),
                            Integer.parseInt(response.body().get(i).getDeadlineYear()), Integer.parseInt(response.body().get(i).getAcceptedDay()), Integer.parseInt(response.body().get(i).getAcceptedMonth()),
                            Integer.parseInt(response.body().get(i).getAcceptedYear()), response.body().get(i).getStartTime(), null, response.body().get(i).getStartTimeMax(), true, false,
                            null, null); 


                    dbConnectionProblems.insertIntoDB(response.body().get(i).getTaskID(), true, null, null, null, null);
                }
                dbConnectionProblems.close();
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void aVoid) {
            if(!anim.hasEnded()){

                refreshIV.setAnimation(null);
            }
            String lastSynchro = calendar.get(Calendar.HOUR_OF_DAY) + ":" + calendar.get(Calendar.MINUTE) + "@" + calendar.get(Calendar.DAY_OF_MONTH) + "-" + (calendar.get(Calendar.MONTH)-1) + "-" + calendar.get(Calendar.YEAR);
            ProjectStuff.saveLastSynchro(lastSynchro, context);

            String synchroTime = "Last synchro: " + DateParser.parseTime(context, calendar.get(Calendar.HOUR_OF_DAY), calendar.get(Calendar.MINUTE));
            tvSynchroInfo.setText(synchroTime);
            rlRefresh.setEnabled(true);

        }
    }

还有execute()方法：

rlRefresh.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Reconnect refreshEvent = new Reconnect();
                refreshEvent.execute("12");
            }
        });

经过一段时间（需要同步）后，胺化作用停止，因此看起来好像调用了onPostExecute（）并更新了TextView，但是以后的每次调用都不会更新它。

Answer 1

好的，我发现了问题。我在calendar = Calendar.getInstance()方法中调用了onCreate()，
我应该在保存之前先在onPostExecute()中进行此操作，然后在TextView中显示它以获取正确的时间。 br />

onPostExecute（）似乎仅被调用一次

1 个答案: