2.01 add the Network Code

Well, I am very, very new to android development. So please don't laugh. I want to learn at my old age. Went through the Udacity Java class now I'm here. Got through all of part 1 with minimal issues. I even created a second string array in my app just to make sure I got it. yup it worked!! However, now I am stuck!!! After adding the networking code my app won't work. Everything looks right to me, but what do I know, lol. Hopefully someone out there can help me. This is day 3 trying to find out what I'm doing wrong.

MainActivity.java

package com.example.android.sunshine.app;

import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.Menu; import android.view.MenuItem;

public class MainActivity extends AppCompatActivity {

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

    if (savedInstanceState == null) {
        getSupportFragmentManager().beginTransaction()
                .add(R.id.container, new MainActivityFragment.PlaceholderFragment())
                .commit();
    }

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

}

MainActivityFragment.java

package com.example.android.sunshine.app;

import android.os.Bundle; import android.support.v4.app.Fragment; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.ListView;

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.util.ArrayList; import java.util.Arrays; import java.util.List;

/**

A placeholder fragment containing a simple view. */ public class MainActivityFragment extends Fragment {

public static class PlaceholderFragment extends Fragment{

// Declaring Adapter

ArrayAdapter mForcecastAdapter;

public PlaceholderFragment() { }

@Override

//this is the onCreateView method for the placeholder fragment

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

//Creates the String[] Array named dateForecastArray

String[] dateForecastArray = {
        "Today - Sunny - 88/63",
        "Tomorrow - Foggy - 70/46",
        "Weds - Cloudy - 72/63",
        "Thurs - Rainy - 64/51",
        "Fri - Foggy - 70/46",
        "Sat - Sunny - 76/68",
        "Sun - Trapped in Heat - 105/99"
};

//Creates the String[] Array named oldDateForecastArray "My test"

String[] oldDateForecastArray ={
        "Mon - Jan 1, 2017 - Cold/Snow - 15/3",
        "Tues - Jan 2, 2017 - Rain/Snow - 15/3",
        "Wed - Jan 3, 2017 - Cold - 15/3",
        "Thus - Jan 4, 2017 - Rain - 15/3",
        "Fri - Jan 5, 2017 - Icy Rain - 15/3",
        "Sat - Jan 6, 2017 - Cold - 15/3",
        "Sun - Jan 7, 2017 - Sunny/Cold - 15/3"
};

//calling the String Array

List<String> weekForecast = new ArrayList<String>(
        Arrays.asList(oldDateForecastArray)
);

/**
 * initializing Adapter:
 * create ArrayAdapter<String>:
* mForcecastAdapter = new ArrayAdapter<String>
*
*Parameters:
*    context: getActivity()
*
*    --**NOTE: "context" contains global information about the app environment
*    -*       It allows us to access system services and resources
*    -*       As well as the application specific resources we define
*
*    ID of list item layout: R.layout.list_item_forecast
*    --**Note: "R.layout" refers to a layout file
*
*    ID of text view: R.id.list_item_forecast_textview
*    --**Note: "R.id" refers to a specific XML element with the matching id attribute
*
*    list of data: weekForecast
*    --**Note: The array list of forecast defined
 */

mForcecastAdapter =
        new ArrayAdapter<String> (
                //The current context (the fragment's parent activity)
                getActivity(),
                //ID of list item layout
                R.layout.list_item_forecast,
                //ID of textview to populate
                R.id.list_item_forecast_textview,
                //forecast data
                weekForecast);
//inflated rootView
View rootView = inflater.inflate(R.layout.fragment_main, container, false);

//Create reference to listview find by ID
/**
 * View hierarchy: example
 * tier 1:                [Relative Layout] id:root
 *                                   /    \
 * tier 2: [Linear Layout] id:container,  [Button] id:btn
 *             /           \
 * t3: [image] no id,  [TextView] id:txt
 *
 * java code:
 *      Button b = (Button)this.findViewById(R.id.btn);
 *      LinearLayout container = (LinearLayout)this.findViewById(R.id.container)
 *      TextView t = (TextView)container.findViewById(R.id.txt);
 */

//Get a reference to the ListView. rootView here refers to rootView of the fragment inflated above
ListView listView = (ListView) rootView.findViewById(R.id.listview_forecast);

//binding adapter to listView
listView.setAdapter(mForcecastAdapter);

// These two need to be declared outside the try/catch
// so that they can be closed in the finally block.
HttpURLConnection urlConnection = null;
BufferedReader reader = null;

// Will contain the raw JSON response as a string.
String forecastJsonStr = null;

try {
    // Construct the URL for the OpenWeatherMap query
    // Possible parameters are avaiable at OWM's forecast API page, at
    // http://openweathermap.org/API#forecast
    URL url = new URL("http://api.openweathermap.org/data/2.5/forecast/daily?q=30034&mode=json&units=metric&cnt=7&APPID=c67f4ffaa108e5944910a9d3795aad9e");

    // Create the request to OpenWeatherMap, and open the connection
    urlConnection = (HttpURLConnection) url.openConnection();
    urlConnection.setRequestMethod("GET");
    urlConnection.connect();

    // Read the input stream into a String
    InputStream inputStream = urlConnection.getInputStream();
    StringBuffer buffer = new StringBuffer();
    if (inputStream == null) {
        // Nothing to do.
        return null;
    }
    reader = new BufferedReader(new InputStreamReader(inputStream));

    String line;
    while ((line = reader.readLine()) != null) {
        // Since it's JSON, adding a newline isn't necessary (it won't affect parsing)
        // But it does make debugging a *lot* easier if you print out the completed
        // buffer for debugging.
        buffer.append(line + "\n");
    }

    if (buffer.length() == 0) {
        // Stream was empty.  No point in parsing.
        return null;
    }
    forecastJsonStr = buffer.toString();
} catch (IOException e) {
    Log.e("PlaceholderFragment", "Error ", e);
    // If the code didn't successfully get the weather data, there's no point in attemping
    // to parse it.
    return null;
} finally{
    if (urlConnection != null) {
        urlConnection.disconnect();
    }
    if (reader != null) {
        try {
            reader.close();
        } catch (final IOException e) {
            Log.e("PlaceholderFragment", "Error closing stream", e);
        }
    }
}

return rootView;

}

udacity / Sunshine-Version-2

2.01 add the Network Code #325