collect google AID

	AsyncTask<Void, Void, String> task = new AsyncTask<Void, Void, String>() {
			@Override
			protected String doInBackground(Void... params) {
				AdvertisingIdClient.Info idInfo = null;
				try {
					idInfo = AdvertisingIdClient.getAdvertisingIdInfo(getApplicationContext());
				} catch (GooglePlayServicesNotAvailableException e) {
					e.printStackTrace();
				} catch (GooglePlayServicesRepairableException e) {
					e.printStackTrace();
				} catch (IOException e) {
					e.printStackTrace();
				}
				String advertId = null;
				try{
					advertId = idInfo.getId();
				}catch (NullPointerException e){
					e.printStackTrace();
				}

				return advertId;
			}

			@Override
			protected void onPostExecute(String advertId) {
				Toast.makeText(getApplicationContext(), advertId, Toast.LENGTH_SHORT).show();
			}

		};
		task.execute();