AdvertisingIdClient getAdvertisingIdInfo hangs forever

Question

I\'m trying to get advertising ID from Google Play services API. Here is a sample code:

...
import com.google.android.gms.ads.identifier.AdvertisingIdClient;
imp         


        

Answer 1

Unfortunately the getAdvertisingIdInfo call needs to be done from a background thread, you should not block the main thread while invoking it. Seems like there is no option to get the AdId synchronously.

---- EDIT----

I could achieve this by running on a new thread. Here is what finally work for me. It is not hanging anymore (May not be an ideal)

getGAIDSync(){
 final CountDownLatch  latch  = new CountDownLatch(1);
 new Thread(new Runnable() {
            @Override
            public void run() {               
                getGoogleAdsIDAsyncTask.execute().get(5000, TimeUnit.MilliSecond);
               latch.countDown();                
    }}).start();
    try {
        latch.await(5000,TimeUnit.MILLISECONDS);
    } catch (InterruptedException e) {
         e.printStackTrace();
    }

}

Answer 2

I found the reason. It shouldn't block onStart() handler because blocked context blocks Play API in ID settings obtaining. Fixed code looks like this:

@Override
protected void onStart() {
    super.onStart();
    Thread thr = new Thread(new Runnable() {
        @Override
        public void run() {
            try {
                Context ctx = MyActivity.this.getApplicationContext();
                AdvertisingIdClient.Info adInfo = AdvertisingIdClient.getAdvertisingIdInfo(ctx);
                finished(adInfo);
            } catch (...) {
                // All exceptions blocks
            }

            finished(null);
        }
    });

    thr.start();
}

private void finished(final AdvertisingIdClient.Info adInfo){
    if(adInfo!=null){
        // In case you need to use adInfo in UI thread
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                // Do some stuff with adInfo
            }
        });
    }
}

It would be helpful if official instructions had such usage comments.