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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
Posted by Martin Olsson
Martin Olsson
449 Points

FATAL EXCEPTION: OkHttp Dispatcher

Hi,

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();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    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();
        logging.setLevel(HttpLoggingInterceptor.Level.BASIC);

        OkHttpClient client = new OkHttpClient.Builder()
                .addInterceptor(logging)
                .build();
        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 {
                    response = call.execute();
                    if (response.isSuccessful()) {

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

            }

        });
    }
}

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, R.string.network_unavailable_message,Toast.LENGTH_LONG);
    }
    return isAvailable;
}

}