upload/update pairs

public void uploadExercise(final Pattern pattern) {
        if (AzureServiceAdapter.getInstance().getClient() == null)
            return;

        // Insert the new item
        @SuppressLint("StaticFieldLeak") AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>(){
            @Override
            protected Void doInBackground(Void... params) {
                try {
                    final Pattern entity = addExerciseInTableOffline(pattern);

                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            _ExerciseId_for_pairs = entity.getId();

                            for (int i=0 ;i<items.size(); i++){
                                Pair pair = new Pair(items.get(i).getText1().trim(), items.get(i).getText2().trim());
                                pair.setExerciseId(_ExerciseId_for_pairs);

                                uploadPair(pair);
                            }

                        }
                    });
                } catch (final Exception e) {
                    createAndShowDialogFromTask(e, "Error4");
                }
                return null;
            }
        };
        runAsyncTask(task);
    }

public void uploadPair(final Pair pair) {
        if (AzureServiceAdapter.getInstance().getClient() == null)
            return;

        // Insert the new item
        @SuppressLint("StaticFieldLeak") AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>(){
            @Override
            protected Void doInBackground(Void... params) {
                try {
                    addPairsInTableOffline(pair);

                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            System.out.println("Upload 1 pair done");
                        }
                    });
                } catch (final Exception e) {
                    createAndShowDialogFromTask(e, "Error4");
                }
                return null;
            }
        };
        runAsyncTask(task);
    }

    public void addPairsInTableOffline(Pair pair) throws ExecutionException, InterruptedException {
        Global_config.mPairTableOffline.insert(pair).get();
        try {
            sync().get();
        } catch (MobileServicePushFailedException e) {
            e.printStackTrace();
        }
    }