CODEWITHSUNDEEP
androidmultithreading
Zishan Neno
Zishan Neno

Reputation: 2817

Running code in the background and validating the thread

I've been trying for hours to figure this one out and have tried various techniques but can't seem to get a task running in the background. I got this code in my OnClickListener:

new Thread(new Runnable() {
     public void run() {
          //doing some work in the background here
          Log.d(tag, "Thread: " + checkThread());
     }
}).start();

And within the thread, I'm checking if the code was executed on the main/UI thread or background. So I've got this:

private String checkThread() {
    if (Looper.getMainLooper().getThread() == Thread.currentThread()) {
        return "Main";
    } else {
        return "Background";
    }
}

But the above always returns "Main". I've tried Handler, AsyncTask etc. but all of them return the same thing.

Any pointers on how I could get my code to run in the background and also be able to see it in the log that it's not running in the main thread?

Upvotes: 1

Views: 186

Answers (1)

Blo
Blo

Reputation: 11988

My guess is you have to specify the type of thread priority with setThreadPriority. Try as follows:

new Thread(new Runnable() {
     public void run() {
         // moves the current Thread into the background
         android.os.Process.setThreadPriority(
                        android.os.Process.THREAD_PRIORITY_BACKGROUND);

         // doing some work in the background here
         Log.d(tag, "Thread: " + checkThread());
     }
}).start();

This should be return background.

Upvotes: 1

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