Question

我在此代码中收到以下错误：＆＃34;您的领域是从没有Looper的线程打开的。异步查询需要处理程序来发送查询结果＆＃34;在这一行：

"RealmResults<UserVehicle> completed = realm.where(UserVehicle.class).equalTo("id", userVehicleID).findAllAsync();"

我尝试在Handler（Looper.getMain（））中设置realm.executeTransaction但没有运气。我做错了什么？

PSVehicleService.getInstance(PSVehicleDetailsActivity.this).fetchVehicleTrips(userVehicle, fiveWeeksBeforeDate, lastTripDate, userID, new JsonCallback() {
            @Override
            public void onResponse(final JSONObject jsonObject, VolleyError error) {
                if(jsonObject != null) {
                    Log.i("","testVehicles maybeFetchData 11");
                    realm.executeTransaction(new Realm.Transaction() {
                        @Override
                        public void execute(Realm realm) {
                            try {
                                ObjectMapper mapper = new ObjectMapper();
                                final List<Trip> trips = mapper.readValue(jsonObject.getJSONArray("trips").toString(), new TypeReference<List<Trip>>() {
                                });
                                Log.i("","testVehicles maybeFetchData 12");
                                RealmResults<UserVehicle> completed = realm.where(UserVehicle.class).equalTo("id", userVehicleID).findAllAsync();
                                UserVehicle userVehicle = null;
                                if(completed.size() > 0){
                                    userVehicle = completed.get(0);
                                }
                                if(userVehicle != null) {
                                    Log.i("", "testVehicles maybeFetchData 13");
                                    userVehicle.getTrips().clear();
                                    Log.i("", "testVehicles maybeFetchData 14");
                                    userVehicle.getTrips().addAll(trips);
                                    Log.i("", "testVehicles maybeFetchData 15");
                                    realm.copyToRealmOrUpdate(userVehicle);
                                    Log.i("", "testVehicles maybeFetchData 16");
                                }else{
                                    Log.i("", "testVehicles maybeFetchData 16 NULLLLLLLL");
                                }
                            } catch (Exception e) {
                                Log.i("", "fetchTripsSinceWeeksInPast fetchVehicleTrips2 error" + e.getMessage());
                                Utils.appendLog("ERROR fetchVehicleTrips is:" + e.getMessage(), true);
                            }
                        }
                    }, new Realm.Transaction.Callback() {
                        @Override
                        public void onSuccess() {
                            Log.i("","testVehicles maybeFetchData 17");
                            setPager();
                            Log.i("","testVehicles maybeFetchData 18");
                        }

                        @Override
                        public void onError(Exception e) {
                            Log.i("","testVehicles maybeFetchData 18 ERROR:" + e.getMessage());
                        }
                    });
                }
            }
        });

Answer 1

问题是您在异步事务中使用异步查询 - 根本不需要。

当调用realm.executeTransaction(Realm.Transaction, Realm.Transaction.Callback)时，事务中的代码块将在一个没有looper且不需要looper的工作线程中运行。

但对于异步查询，您需要一个looper来确保查询结果可以在Android上传回。

因此，要解决您的问题，只需使用同步查询，只需让它在事务的工作线程中运行即可。为：

RealmResults<UserVehicle> completed = realm.where(UserVehicle.class).equalTo("id", userVehicleID).findAll();

Android错误与realm，尝试使用异步。说它是从一个没有弯针的线程打开的

1 个答案: