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Android Build a Weather App (2015) Concurrency and Error Handling Making Our Code Asynchronous

Posted by Antwain Smith
Antwain Smith
414 Points

Need Help with Asynchronous code

I'm using a new version on Android Studios than what he is using in the video. But I did try to keep as much of what he is using and the code the same. This is the error message I receive whenever I change the code to an asynchronous call: E/libprocessgroup: failed to make and chown /acct/uid_10058: Read-only file system 11-06 14:58:25.154 3572-3572/? W/Zygote: createProcessGroup failed, kernel missing CONFIG_CGROUP_CPUACCT? 11-06 14:58:25.155 3572-3572/? I/art: Not late-enabling -Xcheck:jni (already on) 11-06 14:58:25.182 3572-3580/? E/art: Failed sending reply to debugger: Broken pipe 11-06 14:58:25.182 3572-3580/? I/art: Debugger is no longer active 11-06 14:58:25.302 3572-3572/? I/InstantRun: starting instant run server: is main process 11-06 14:58:25.333 3572-3572/? W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable 11-06 14:58:25.481 3572-3572/? D/com.example.shikirrawilliams.myweatherapp.MainActivity: Main UI code is Running! 11-06 14:58:25.487 3572-3591/? D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true

                                             [ 11-06 14:58:25.494  3572: 3572 D/         ]
                                             HostConnection::get() New Host Connection established 0xa3c2abf0, tid 3572


                                             [ 11-06 14:58:25.530  3572: 3572 W/         ]
                                             Unrecognized GLES max version string in extensions: ANDROID_EMU_CHECKSUM_HELPER_v1

11-06 14:58:25.531 3572-3572/? D/Atlas: Validating map... 11-06 14:58:25.602 3572-3591/? I/OpenGLRenderer: Initialized EGL, version 1.4 11-06 14:58:25.602 3572-3591/? W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without... 11-06 14:58:25.606 3572-3591/? D/EGL_emulation: eglCreateContext: 0xae834b80: maj 2 min 0 rcv 2 11-06 14:58:25.608 3572-3591/? D/EGL_emulation: eglMakeCurrent: 0xae834b80: ver 2 0 11-06 14:58:25.610 3572-3591/? D/OpenGLRenderer: Enabling debug mode 0 11-06 14:58:25.615 3572-3591/? D/EGL_emulation: eglMakeCurrent: 0xae834b80: ver 2 0 11-06 14:58:25.696 3572-3572/? W/art: Before Android 4.1, method int android.support.v7.widget.ListViewCompat.lookForSelectablePosition(int, boolean) would have incorrectly overridden the package-private method in android.widget.ListView

Antwain Smith
Antwain Smith
414 Points

This is my code for Main Activity:

public class MainActivity extends AppCompatActivity {

public static  final String TAG = MainActivity.class.getName();

private CurrentWeather currentWeather;

@BindView(R.id.timeLabel) TextView timeLabel;
@BindView(R.id.tempLabel) TextView temperatureLabel;
@BindView(R.id.humidityLabel) TextView humidityValue;
@BindView(R.id.precipLabel) TextView precipValue;
@BindView(R.id.summaryLabel) TextView summaryLabel;
@BindView(R.id.weatherIcon) ImageView weatherIcon;


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

    String apiKey = "0123456789abcdef9876543210fedcba";
    double latitude = 42.3601;
    double longitude = -71.0589;
    String url = "https://api.darksky.net/forecast/" + apiKey + "/" + latitude + "," + longitude;

    if(isNetworkAvailable()) {

        OkHttpClient client = new OkHttpClient();
        Request request = new Request.Builder()
                .url(url)
                .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);
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                updateWeather();
                            }
                        });
                    } else {
                        alertUserAboutError();
                    }
                } catch (IOException e) {
                    Log.e(TAG, "Exception caught: ", e);

// e.printStackTrace(); } catch (JSONException e){ Log.e(TAG, "Exception caught: ", e); } } }); } else { Toast.makeText(this, getString(R.string.network_unavailable_message), Toast.LENGTH_LONG).show(); }

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

}

private void updateWeather() {

    temperatureLabel.setText(currentWeather.getTemperature() + "");
    timeLabel.setText("At " + currentWeather.getFormattedTime() + " it will be");
    humidityValue.setText(currentWeather.getHumidity() + "");
    precipValue.setText(currentWeather.getChanceOfPrecipiatation() + "%");
    summaryLabel.setText(currentWeather.getSummary());
}

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.setChanceOfPrecipiatation(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;
    }
    return isAvailable;
}

private void alertUserAboutError() {

    AlertDialogFragment dialog = new AlertDialogFragment();
    dialog.show(getFragmentManager(), "error_didalog");

}

}