Default AsyncTask thread priority (BACKGROUND) is not applied

In default async task constructor source we have following code, which sets thread priority to Process.THREAD_PRIORITY_BACKGROUND = 10

  mWorker = new WorkerRunnable<Params, Result>() {
        public Result call() throws Exception {
            mTaskInvoked.set(true);
            Result result = null;
            try {
                Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND);
                //noinspection unchecked
                result = doInBackground(mParams);
                Binder.flushPendingCommands();
            } catch (Throwable tr) {
                mCancelled.set(true);
                throw tr;
            } finally {
                postResult(result);
            }
            return result;
        }
    };

I created a sample application where I created simple asynctask and in doInBackground() I log thread priority via

Log.d("@@@ AsyncTask", "Thread name = " + Thread.currentThread().getName() + "Tread priority " + Thread.currentThread().getPriority());

Expected result: com.example.myapplication D/@@@ AsyncTask: Thread name = AsyncTask #1Tread priority 10

Actual result: com.example.myapplication D/@@@ AsyncTask: Thread name = AsyncTask #1Tread priority 5

Thread priority of background thread is the same as Main thread priority com.example.myapplication D/@@@ MainActivity onCreate: Thread name = mainTread priority 5

I've tested this on API 19 and API 26. Result is the same.

Why background thread priority is not applied in async task? Or my method of reading priority is wrong?

I can upload sources to github, but there not much to upload. Only AsyncTask and log statement.

Turned out that my method of getting thread priority was wrong.

Right approach for getting thread priority is Process.getThreadPriority(Process.myTid())