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Android Build a Weather App (2015) Concurrency and Error Handling What To Do When the Network is Down

Martin Olsson
Martin Olsson
449 Points

FATAL EXCEPTION: OkHttp Dispatcher


I get an error message which I can't find a solution for on the internet, and the previous solution of deleting the Log statement doesn't work.

Code: package martinsoft.stormy;

import android.content.Context; import android.inputmethodservice.KeyboardView; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.support.annotation.NonNull; import android.support.v4.net.ConnectivityManagerCompat; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import android.widget.Toast;

import java.io.IOException;

import okhttp3.Call; import okhttp3.Callback; import okhttp3.Headers; import okhttp3.OkHttpClient; import okhttp3.Request; import okhttp3.Response; import okhttp3.logging.HttpLoggingInterceptor;

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

protected void onCreate(Bundle savedInstanceState) {

    String apiKey = "7bc9ae2a7c90f4eeb54caedd881cbc1a";
    double latitude = 37.8267;
    double longitude = -122.423;
    String forecastUrl = "https://api.darksky.net/forecast/" + apiKey +
            "/" + latitude + "," + longitude;

    if (isNetworkAvailable() ) {

        HttpLoggingInterceptor logging = new HttpLoggingInterceptor();

        OkHttpClient client = new OkHttpClient.Builder()
        Request request = new Request.Builder().

        Call call = client.newCall(request);
        call.enqueue(new Callback() {

            public void onFailure(Call call, IOException e) {


            public void onResponse(Call call, Response response) throws IOException {

                try {
                    response = call.execute();
                    if (response.isSuccessful()) {

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



private boolean isNetworkAvailable() {
    ConnectivityManager manager = (ConnectivityManager)
    NetworkInfo networkInfo = manager.getActiveNetworkInfo();
    boolean isAvailable = false;

    if (networkInfo != null && networkInfo.isConnected() ) {
        isAvailable = true;

    } else {
        Toast.makeText(this, R.string.network_unavailable_message,Toast.LENGTH_LONG);
    return isAvailable;