Question

I’m trying to upload the contacts on a different Thread, I’m getting the application context but it seems not to work. Why?

Here’s the code:

private void uploadall() {
    new Thread(new Runnable() {
        public void run() {

            Contacts contacts = new Contacts(getApplicationContext());
            contacts.phoneandname();

            // Apps
            ListApps mList = new ListApps();
            mList.loadInstalledApps(false, getApplicationContext());

        }
    });
}

And when I try to upload without the thread it works perfectly… Why?

Answer 1

You’re not actually starting the thread, try the following:

private void uploadall() {
  Thread thread = new Thread(new Runnable() {
    public void run() {
      ...
    }
  });

  thread.start();
}

The Oracle concurrency tutorial is quite a good resource when starting out with multi-threading in Java and can be found here.