Playground

S01.01-Exercise-CreateLayout/app/build.gradle

@@ -6,7 +6,7 @@ android {
     defaultConfig {
         applicationId "com.example.android.sunshine"
         minSdkVersion 14
-        targetSdkVersion 25
+        targetSdkVersion 26
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -22,9 +22,6 @@ dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation 'com.android.support:appcompat-v7:28.0.0'
 
-    // TODO (10) Remove this dependency as we won't be needing it for the project until later
-    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
-
     // Instrumentation dependencies use androidTestImplementation
     // (as opposed to testImplementation for local unit tests run in the JVM)
     androidTestImplementation 'junit:junit:4.12'

S01.01-Exercise-CreateLayout/app/src/main/res/layout/activity_forecast.xml

@@ -14,29 +14,20 @@
      See the License for the specific language governing permissions and
      limitations under the License.
 -->
-<!--TODO (1) Change the ConstraintLayout to a FrameLayout-->
-<!--TODO (7) Remove the line that declares the id, we don't need it-->
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:id="@+id/activity_main"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <!--TODO (8) Wrap the TextView in a ScrollView-->
-    <!--TODO (9) Set the ScrollView width to match_parent and the height to wrap_content-->
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+        <TextView
+            android:id="@+id/tv_weather_data"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:padding="16dp"
+            android:textSize="20sp"/>
+    </ScrollView>
 
-    <!--TODO (2) Change the TextView's android:id attribute to tv_weather_data-->
-    <!--TODO (3) Give the TextView 16dp of padding-->
-    <!--TODO (4) Set the text size to 20sp-->
-    <!--TODO (5) Remove all attributes with the word constraint in them-->
-    <!--TODO (6) Remove the default text from the TextView-->
-    <TextView
-        android:id="@+id/text_view"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Hello World!"
-        app:layout_constraintBottom_toBottomOf="@+id/activity_main"
-        app:layout_constraintLeft_toLeftOf="@+id/activity_main"
-        app:layout_constraintRight_toRightOf="@+id/activity_main"
-        app:layout_constraintTop_toTopOf="@+id/activity_main" />
-</android.support.constraint.ConstraintLayout>
+</FrameLayout>

S01.02-Exercise-AddWeatherList/app/src/main/java/com/example/android/sunshine/MainActivity.java

@@ -17,20 +17,36 @@
 
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
+import android.widget.TextView;
 
-public class MainActivity extends AppCompatActivity {
+import com.example.android.sunshine.utilities.SunshineWeatherUtils;
 
-    // TODO (1) Create a field to store the weather display TextView
+public class MainActivity extends AppCompatActivity {
 
+    TextView weatherDisplay;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_forecast);
-
-        // TODO (2) Use findViewById to get a reference to the weather display TextView
-
-        // TODO (3) Create an array of Strings that contain fake weather data
-
-        // TODO (4) Append each String from the fake weather data array to the TextView
+        weatherDisplay = (TextView) findViewById(R.id.tv_weather_data);
+        String[] dummyWeatherData = {
+                "Today, May 17 - Clear - 17°C / 15°C",
+                "Tomorrow - Cloudy - 19°C / 15°C",
+                "Thursday - Rainy- 30°C / 11°C",
+                "Friday - Thunderstorms - 21°C / 9°C",
+                "Saturday - Thunderstorms - 16°C / 7°C",
+                "Sunday - Rainy - 16°C / 8°C",
+                "Monday - Partly Cloudy - 15°C / 10°C",
+                "Tue, May 24 - Meatballs - 16°C / 18°C",
+                "Wed, May 25 - Cloudy - 19°C / 15°C",
+                "Thu, May 26 - Stormy - 30°C / 11°C",
+                "Fri, May 27 - Hurricane - 21°C / 9°C",
+                "Sat, May 28 - Meteors - 16°C / 7°C",
+                "Sun, May 29 - Apocalypse - 16°C / 8°C",
+                "Mon, May 30 - Post Apocalypse - 15°C / 10°C",
+        };
+        for (String data : dummyWeatherData) {
+            weatherDisplay.append(data + "\n\n\n");
+        }
     }
 }

S02.01-Exercise-Networking/app/src/main/AndroidManifest.xml

@@ -17,7 +17,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.example.android.sunshine">
 
-    <!--TODO (2) Add the INTERNET permission-->
+    <uses-permission android:name="android.permission.INTERNET"/>
 
     <application
         android:allowBackup="true"

S02.01-Exercise-Networking/app/src/main/java/com/example/android/sunshine/MainActivity.java

@@ -15,10 +15,17 @@
  */
 package com.example.android.sunshine;
 
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.widget.TextView;
 
+import com.example.android.sunshine.data.SunshinePreferences;
+import com.example.android.sunshine.utilities.NetworkUtils;
+
+import java.io.IOException;
+import java.net.URL;
+
 public class MainActivity extends AppCompatActivity {
 
     private TextView mWeatherTextView;
@@ -34,45 +41,42 @@ protected void onCreate(Bundle savedInstanceState) {
          */
         mWeatherTextView = (TextView) findViewById(R.id.tv_weather_data);
 
-        // TODO (4) Delete the dummy weather data. You will be getting REAL data from the Internet in this lesson.
         /*
          * This String array contains dummy weather data. Later in the course, we're going to get
          * real weather data. For now, we want to get something on the screen as quickly as
          * possible, so we'll display this dummy data.
          */
-        String[] dummyWeatherData = {
-                "Today, May 17 - Clear - 17°C / 15°C",
-                "Tomorrow - Cloudy - 19°C / 15°C",
-                "Thursday - Rainy- 30°C / 11°C",
-                "Friday - Thunderstorms - 21°C / 9°C",
-                "Saturday - Thunderstorms - 16°C / 7°C",
-                "Sunday - Rainy - 16°C / 8°C",
-                "Monday - Partly Cloudy - 15°C / 10°C",
-                "Tue, May 24 - Meatballs - 16°C / 18°C",
-                "Wed, May 25 - Cloudy - 19°C / 15°C",
-                "Thu, May 26 - Stormy - 30°C / 11°C",
-                "Fri, May 27 - Hurricane - 21°C / 9°C",
-                "Sat, May 28 - Meteors - 16°C / 7°C",
-                "Sun, May 29 - Apocalypse - 16°C / 8°C",
-                "Mon, May 30 - Post Apocalypse - 15°C / 10°C",
-        };
 
-        // TODO (3) Delete the for loop that populates the TextView with dummy data
         /*
          * Iterate through the array and append the Strings to the TextView. The reason why we add
          * the "\n\n\n" after the String is to give visual separation between each String in the
          * TextView. Later, we'll learn about a better way to display lists of data.
          */
-        for (String dummyWeatherDay : dummyWeatherData) {
-            mWeatherTextView.append(dummyWeatherDay + "\n\n\n");
-        }
 
-        // TODO (9) Call loadWeatherData to perform the network request to get the weather
+        loadWeatherData();
     }
 
-    // TODO (8) Create a method that will get the user's preferred location and execute your new AsyncTask and call it loadWeatherData
+    public void loadWeatherData() {
+        new FetchWeatherTask().execute(NetworkUtils.buildUrl(SunshinePreferences.getPreferredWeatherLocation(this)));
+    }
+    public class FetchWeatherTask extends AsyncTask<URL, Void, String> {
+        @Override
+        protected String doInBackground(URL... urls) {
+            URL searchURL = urls[0];
+            String weatherDataSearchResults = null;
+            try {
+                weatherDataSearchResults = NetworkUtils.getResponseFromHttpUrl(searchURL);
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+            return  weatherDataSearchResults;
+        }
 
-    // TODO (5) Create a class that extends AsyncTask to perform network requests
-    // TODO (6) Override the doInBackground method to perform your network requests
-    // TODO (7) Override the onPostExecute method to display the results of the network request
+        @Override
+        protected void onPostExecute(String weatherDataSearchResults) {
+            if (weatherDataSearchResults != null && !weatherDataSearchResults.equals("")) {
+                mWeatherTextView.setText(weatherDataSearchResults);
+            }
+        }
+    }
 }

S02.01-Exercise-Networking/app/src/main/java/com/example/android/sunshine/utilities/NetworkUtils.java

@@ -15,9 +15,12 @@
  */
 package com.example.android.sunshine.utilities;
 
+import android.net.Uri;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.Scanner;
 
@@ -65,8 +68,20 @@ public final class NetworkUtils {
      * @return The URL to use to query the weather server.
      */
     public static URL buildUrl(String locationQuery) {
-        // TODO (1) Fix this method to return the URL used to query Open Weather Map's API
-        return null;
+        Uri builtUri = Uri.parse(FORECAST_BASE_URL).buildUpon()
+                .appendQueryParameter(QUERY_PARAM, locationQuery)
+                .appendQueryParameter(UNITS_PARAM, units)
+                .appendQueryParameter(FORMAT_PARAM, format)
+                .appendQueryParameter(DAYS_PARAM, String.valueOf(numDays))
+                .build();
+
+        URL url = null;
+        try {
+            url = new URL(builtUri.toString());
+        } catch (MalformedURLException e) {
+            e.printStackTrace();
+        }
+        return url;
     }
 
     /**

S02.02-Exercise-Menus/app/src/main/java/com/example/android/sunshine/MainActivity.java

@@ -18,6 +18,8 @@
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
+import android.view.Menu;
+import android.view.MenuItem;
 import android.widget.TextView;
 
 import com.example.android.sunshine.data.SunshinePreferences;
@@ -97,12 +99,21 @@ protected void onPostExecute(String[] weatherData) {
         }
     }
 
-    // TODO (2) Create a menu resource in res/menu/ called forecast.xml
-    // TODO (3) Add one item to the menu with an ID of action_refresh
-    // TODO (4) Set the title of the menu item to "Refresh" using strings.xml
 
-    // TODO (5) Override onCreateOptionsMenu to inflate the menu for this Activity
-    // TODO (6) Return true to display the menu
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.forecast, menu);
+        return true;
+    }
+
 
-    // TODO (7) Override onOptionsItemSelected to handle clicks on the refresh button
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        int menuItemThatWasSelected = item.getItemId();
+        if (menuItemThatWasSelected == R.id.action_refresh) {
+            mWeatherTextView.setText("");
+            loadWeatherData();
+        }
+        return super.onOptionsItemSelected(item);
+    }
 }

S02.02-Exercise-Menus/app/src/main/res/menu/forecast.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:title="@string/action_refresh"
+        android:id="@+id/action_refresh"
+        android:orderInCategory="1"
+        app:showAsAction="ifRoom"
+        />
+</menu>

S02.02-Exercise-Menus/app/src/main/res/values/strings.xml

@@ -24,8 +24,7 @@
     <!--or something similar.-->
     <string name="app_name">Sunshine</string>
 
-    <!--TODO (1) Add a string for the title of the refresh button, "Refresh"-->
-
+    <string name="action_refresh">Refresh</string>
 
     <!-- - - - - - - - - - - - - -->
     <!--Used by SunshineDateUtils-->

S02.03-Exercise-Polish/app/src/main/java/com/example/android/sunshine/MainActivity.java

@@ -21,6 +21,8 @@
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
+import android.view.View;
+import android.widget.ProgressBar;
 import android.widget.TextView;
 
 import com.example.android.sunshine.data.SunshinePreferences;
@@ -33,10 +35,8 @@ public class MainActivity extends AppCompatActivity {
 
     private TextView mWeatherTextView;
 
-    // TODO (6) Add a TextView variable for the error message display
-
-    // TODO (16) Add a ProgressBar variable to show and hide the progress bar
-
+    private TextView mErrorMessageDisplay;
+    private ProgressBar mProgressBar;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -48,10 +48,8 @@ protected void onCreate(Bundle savedInstanceState) {
          */
         mWeatherTextView = (TextView) findViewById(R.id.tv_weather_data);
 
-        // TODO (7) Find the TextView for the error message using findViewById
-
-        // TODO (17) Find the ProgressBar using findViewById
-
+        mErrorMessageDisplay = (TextView) findViewById(R.id.tv_error_message);
+        mProgressBar = (ProgressBar) findViewById(R.id.pb_loading_data);
         /* Once all of our views are setup, we can load the weather data. */
         loadWeatherData();
     }
@@ -61,18 +59,27 @@ protected void onCreate(Bundle savedInstanceState) {
      * background method to get the weather data in the background.
      */
     private void loadWeatherData() {
-        // TODO (20) Call showWeatherDataView before executing the AsyncTask
+        showWeatherDataView();
         String location = SunshinePreferences.getPreferredWeatherLocation(this);
         new FetchWeatherTask().execute(location);
     }
 
-    // TODO (8) Create a method called showWeatherDataView that will hide the error message and show the weather data
+    private void showWeatherDataView() {
+        mErrorMessageDisplay.setVisibility(View.INVISIBLE);
+        mWeatherTextView.setVisibility(View.VISIBLE);
+    }
+    private void showErrorMessage() {
+        mErrorMessageDisplay.setVisibility(View.VISIBLE);
+        mWeatherTextView.setVisibility(View.INVISIBLE);
+    }
+    public class FetchWeatherTask extends AsyncTask<String, Void, String[]> {
 
-    // TODO (9) Create a method called showErrorMessage that will hide the weather data and show the error message
 
-    public class FetchWeatherTask extends AsyncTask<String, Void, String[]> {
 
-        // TODO (18) Within your AsyncTask, override the method onPreExecute and show the loading indicator
+        @Override
+        protected void onPreExecute() {
+            mProgressBar.setVisibility(View.VISIBLE);
+        }
 
         @Override
         protected String[] doInBackground(String... params) {
@@ -102,10 +109,9 @@ protected String[] doInBackground(String... params) {
 
         @Override
         protected void onPostExecute(String[] weatherData) {
-            // TODO (19) As soon as the data is finished loading, hide the loading indicator
-
+            mProgressBar.setVisibility(View.INVISIBLE);
             if (weatherData != null) {
-                // TODO (11) If the weather data was not null, make sure the data view is visible
+                showWeatherDataView();
                 /*
                  * Iterate through the array and append the Strings to the TextView. The reason why we add
                  * the "\n\n\n" after the String is to give visual separation between each String in the
@@ -114,8 +120,9 @@ protected void onPostExecute(String[] weatherData) {
                 for (String weatherString : weatherData) {
                     mWeatherTextView.append((weatherString) + "\n\n\n");
                 }
+            } else {
+                showErrorMessage();
             }
-            // TODO (10) If the weather data was null, show the error message
 
         }
     }