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

Posted by Akshay Rathee
Akshay Rathee
1,205 Points

can't resolve symbol "AlertDialogFragment"

hi guys, i keep getting this error can't resolve symbol "AlertDialogFragment". can you help me? Thanks in advance

5 Answers

Dhruv Gupta
Dhruv Gupta
4,320 Points

If you didn't go to one of your folders, probably UI.

Create a new class and paste the following code:

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_botton_text), null);

        AlertDialog dialog = builder.create();
        return dialog;
    }
}
Akshay Rathee
Akshay Rathee
1,205 Points

Thanks ....there was a slight error in the class. Now its fixed.

Dhruv Gupta
Dhruv Gupta
4,320 Points
Dhruv Gupta
Dhruv Gupta
4,320 Points

Post your code

Akshay Rathee
Akshay Rathee
1,205 Points

package bollywoodfacts.myweather; import android.app.AlertDialog; import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.util.Log; import com.squareup.okhttp.Callback; import com.squareup.okhttp.OkHttpClient; import com.squareup.okhttp.Request; import com.squareup.okhttp.Call; import com.squareup.okhttp.Response;

import java.io.IOException;

public class MainActivity extends ActionBarActivity { public static final String TAG =MainActivity.class.getSimpleName(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);

    String apiKey="HIDDEN BY MODERATOR";
    double latitude=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() {
        @Override
        public void onFailure(Request request, IOException e) {

        }

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

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

            }
        }

        );


        Log.d(TAG, "Main UI code is running");


    }

private void alertUserAboutError() {

AlertDialogFragment dialog=new AlertdialogFragment(); dialog.show(getFragmentManager(),"erroe_dialog"); } }

Dhruv Gupta
Dhruv Gupta
4,320 Points
Dhruv Gupta
Dhruv Gupta
4,320 Points

Oh the answer is pretty clear

You have AlertDialogFragment dialog = new AlertdialogFragment():

Capitalize the lowercase D in the new AlertDialogFragment();

50% of bugs are misspelling or lack of capitalization, They are super annoying, but they are super easy to fix.

Good luck!

Akshay Rathee
Akshay Rathee
1,205 Points

The problem remains.... Its still showing the same error

Dhruv Gupta
Dhruv Gupta
4,320 Points

You did create an AlertDialogFragment class right?

You can't import it if it doesn't exist.

Andre Colares
Andre Colares
5,437 Points
Andre Colares
Andre Colares
5,437 Points

Try to use my code:

            package com.andrecolares.stormy;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;

import com.squareup.okhttp.Call;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    public static final String TAG = MainActivity.class.getSimpleName();
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        String apiKey = "b58df3c3139b75263e389c950140c157";
        double latitude = 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() {
            @Override
            public void onFailure(Request request, IOException e) {

            }

            @Override
            public void onResponse(Response response) throws IOException {
                try {
                    Log.v(TAG, response.body().string());
                    if(response.isSuccessful()){
                    }
                    else {
                       alertUserAboutError();
                    }
                } catch (IOException e) {
                    Log.e(TAG, "Exception caught: ", e);
                }
            }
        });

        Log.d(TAG, "Main UI code is running!");
    }

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

}

Don't forget to rename your package.
Andre Colares
Andre Colares
5,437 Points
Andre Colares
Andre Colares
5,437 Points 
package com.andrecolares.stormy;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.Context;
import android.os.Bundle;

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