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Start your free trial import android.content.Context ; import android.databinding.DataBindingUtil ; import android.net.ConnectivityManager ; import android.net.Network ; import android.net.NetworkInfo ; import android.support.v7.app.AppCompatActivity ; import android.os.Bundle ; import android.text.method.LinkMovementMethod ; import android.util.Log ; import android.widget.TextView ; import android.widget.Toast ; import com.example.stormz.databinding.ActivityMainBinding ; import org.jetbrains.annotations.NotNull ; import org.json.JSONException ; import org.json.JSONObject ; import java.io.IOException ; import okhttp3.Call ; import okhttp3.Callback ; import okhttp3.OkHttpClient ; import okhttp3.Request ; import okhttp3.Response ; public class MainActivity extends AppCompatActivity { private static final String TAG = MainActivity . class . getSimpleName (); private CurrentWeather currentWeather ; @Override protected void onCreate ( Bundle savedInstanceState ) { super . onCreate ( savedInstanceState ); final ActivityMainBinding binding = DataBindingUtil . setContentView ( MainActivity . this , R . layout . activity_main ); TextView darkSky = findViewById ( R . id . darkSkyAttribution ); darkSky . setMovementMethod ( LinkMovementMethod . getInstance ()); String apiKey = "95ae1bd15e1ca7ca1bcd99a0d5650482" ; double latitude = 37.8267 ; double longitude = - 122.4233 ; String forecastURL = "https://api.darksky.net/forecast/" + apiKey + "/" + latitude + "," + longitude ; if ( isNetworkAvailable ()) { OkHttpClient client = new OkHttpClient (); Request request = new Request . Builder () . url ( forecastURL ) . build (); Call call = client . newCall ( request ); call . enqueue ( new Callback () { @Override public void onFailure ( Call call , IOException e ) { @Override public void onResponse ( Call call , Response response ) throws IOException { try { String jsonData = response . body (). string (); Log . v ( TAG , jsonData ); if ( response . isSuccessful ()) { currentWeather = getCurrentDetails ( jsonData ); CurrentWeather displayWeather = new CurrentWeather ( currentWeather . getLocationLabel (), currentWeather . getIcon (), currentWeather . getTime (), currentWeather . getTemperature (), currentWeather . getHumidity (), currentWeather . getPrecipChance (), currentWeather . getSummary (), currentWeather . getTimeZone () binding . setWeather ( displayWeather ); } else { alertUserAboutError (); } catch ( IOException e ) { Log . e ( TAG , "IO Exception caught: " , e ); } catch ( JSONException e ) { Log . e ( TAG , "JSON Exception Caught:" , e ); Log . d ( TAG , "Main UI code is running, horray!" ); private CurrentWeather getCurrentDetails ( String jsonData ) throws JSONException { JSONObject forecast = new JSONObject ( jsonData ); String timezone = forecast . getString ( "timezone" ); Log . i ( TAG , "From JSON: " + timezone ); JSONObject currently = forecast . getJSONObject ( "currently" ); CurrentWeather currentWeather = new CurrentWeather (); currentWeather . setHumidity ( currently . getDouble ( "humidity" )); currentWeather . setTime ( currently . getLong ( "time" )); currentWeather . setIcon ( currently . getString ( "icon" )); currentWeather . setLocationLabel ( "Alcatraz Island, CA" ); currentWeather . setPrecipChance ( currently . getDouble ( "precipProbability" )); currentWeather . setSummary ( currently . getString ( "summary" )); currentWeather . setTemperature ( currently . getDouble ( "temperature" )); currentWeather . setTimeZone ( timezone ); Log . d ( TAG , currentWeather . getFormattedTime ()); return currentWeather ; private boolean isNetworkAvailable () { ConnectivityManager manager = ( ConnectivityManager ) getSystemService ( Context . CONNECTIVITY_SERVICE ); NetworkInfo networkInfo = manager . getActiveNetworkInfo (); boolean isAvailable = false ; if ( networkInfo != null && networkInfo . isConnected ()) { isAvailable = true ; } else { Toast . makeText ( this , getString ( R . string . network_unavailable_message ), Toast . LENGTH_LONG ). show (); return isAvailable ; private void alertUserAboutError () { AlertDialogFragment dialog = new AlertDialogFragment (); dialog . show ( getFragmentManager (), "error_dialog" );

if the problem is that it does not recognize ActivityMainBinding then try to sync the 'build.gradle' app file. According to the video's you should have added 'databinding enabled = true' in this file. After that you need to sync this file in order to recognize the databinding object and generated methods.