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Android Build a Weather App (2015) Concurrency and Error Handling Configuring the Alert Dialog

app not crushing when I set wrong latitude

my app is not displaying the crash message when I set the wrong latitude, what might the problem be

there is my mainactivity:

public class MainActivity extends ActionBarActivity { public static final String TAG = MainActivity.class.getSimpleName();

protected void onCreate(Bundle savedInstanceState) {
    String apiKey ="feebc37394effc0ee0b7c5b637d9f7b8";
    double latitude = 9999;//37.8267;
    double longitude = -122.423;

    String forecastUrl = "https://api.forecast.io/forecast/"+ apiKey +"/,"+ latitude +", " + longitude;
    OkHttpClient client = new OkHttpClient();
    Request request = new Request.Builder().url(forecastUrl).build();
    Call call = client.newCall(request);
    call.enqueue(new Callback() {
        public void onFailure(Request request, IOException e) {


        public void onResponse(Response response) throws IOException {
            try {
                Log.v(TAG, response.body().string());

                if (response.isSuccessful()) {

                else {


            } catch (IOException e) {
                Log.e(TAG, "Exception Caught: ", e);



private void alertAboutError() {
    AlertDialogFragment dialog = new AlertDialogFragment();
    dialog.show(getFragmentManager(), "error_dialog");

} and that's my startDialogue fragment class

public class AlertDialogFragment extends DialogFragment{ @Override public Dialog onCreateDialog(Bundle savedInstanceState) { Context context = getActivity(); AlertDialog.Builder builder =new AlertDialog.Builder(context) .setTitle(context.getString(R.string.error_title)).setMessage(context.getString(R.string.error_message)) .setPositiveButton(context.getString(R.string.error_ok_button_text), null); AlertDialog dialog = builder.create(); return dialog; } }

2 Answers

@Override public void onFailure(Request request, IOException e) { alertAboutError(); }

I noticed that the code in this lesson only results in an error when run on an emulator. I use a real device when working through these lessons, and I couldn't figure out why I wasn't getting an error. In order for the error to show up on my real device, I had to add the code that Mustafa provided above to the onFailure() method in MainActivity.java.

So my onFailure() method ends up looking like this:

public void onFailure(Request request, IOException e) {



UPDATE: The WiFi on my real device was turned off! Not sure how that happened, but when I turned it on again (no data plan on this device) I was able to see the dialog without specifically calling alertUserAboutError() in the onFailure() method.

Kyle Baker
Kyle Baker
8,211 Points

sweet, helped me ty