do some networking

app/build.gradle

@@ -40,6 +40,11 @@ dependencies {
 
     // insert added libraries here
     implementation 'com.google.code.gson:gson:2.8.5'
+    implementation 'com.squareup.retrofit2:retrofit:2.6.1'
+    implementation 'com.squareup.retrofit2:adapter-rxjava2:2.6.1'
+    implementation 'com.squareup.retrofit2:converter-gson:2.6.1'
+    implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
+    implementation 'io.reactivex.rxjava2:rxjava:2.2.12'
 
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test:runner:1.2.0'

app/src/main/AndroidManifest.xml

@@ -5,6 +5,8 @@
 
     <dist:module dist:instant="true" />
 
+    <uses-permission android:name="android.permission.INTERNET" />
+
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"

app/src/main/java/srct/whatsopen/MainActivity.kt

 package srct.whatsopen
 
+import android.annotation.SuppressLint
 import android.os.Bundle
 import com.google.android.material.snackbar.Snackbar
 import androidx.appcompat.app.AppCompatActivity
 import android.view.Menu
 import android.view.MenuItem
+import android.widget.TextView
+import android.widget.Toast
+import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+import io.reactivex.android.schedulers.AndroidSchedulers
+import io.reactivex.schedulers.Schedulers
 import kotlinx.android.synthetic.main.activity_main.*
+import retrofit2.Retrofit
+import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory
+import retrofit2.converter.gson.GsonConverterFactory
+import srct.whatsopen.util.WhatsOpenService
 
 class MainActivity : AppCompatActivity() {
+    private var service: WhatsOpenService? = null
+    private var refreshLayout: SwipeRefreshLayout? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
         setSupportActionBar(toolbar)
-        fab.setOnClickListener { view ->
-            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
-                    .setAction("Action", null).show()
-        }
+        val retrofit = Retrofit.Builder()
+            .baseUrl("https://api.srct.gmu.edu/whatsopen/v2/")
+            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
+            .addConverterFactory(GsonConverterFactory.create())
+            .build()
+        service = retrofit.create(WhatsOpenService::class.java)
+        // setup refresh listener
+        refreshLayout = findViewById<SwipeRefreshLayout>(R.id.swipe_refresh)
+        refreshLayout!!.setOnRefreshListener(this::refresh)
+        refresh()
     }
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
@@ -35,4 +53,25 @@ class MainActivity : AppCompatActivity() {
             else -> super.onOptionsItemSelected(item)
         }
     }
+
+    @SuppressLint("CheckResult")
+    private fun refresh() {
+        refreshLayout!!.isRefreshing = true
+        service!!.getData()
+            .subscribeOn(Schedulers.io())
+            .doOnError { err ->
+                Toast.makeText(
+                    applicationContext,
+                    "Network Error: $err",
+                    Toast.LENGTH_SHORT
+                ).show()
+            }
+            .observeOn(AndroidSchedulers.mainThread())
+            .subscribe { facilities ->
+                run {
+                    findViewById<TextView>(R.id.main_text).text = facilities.toString()
+                    refreshLayout!!.isRefreshing = false
+                }
+            }
+    }
 }

app/src/main/java/srct/whatsopen/util/WhatsOpenService.kt

+package srct.whatsopen.util
+
+import io.reactivex.Observable
+import retrofit2.http.GET
+import srct.whatsopen.model.Facility
+
+interface WhatsOpenService {
+    @GET("facilities")
+    fun getData(): Observable<List<Facility>>
+}
\ No newline at end of file

app/src/main/res/layout/activity_main.xml

 <?xml version="1.0" encoding="utf-8"?>
-<androidx.coordinatorlayout.widget.CoordinatorLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:fitsSystemWindows="true"
+    android:orientation="vertical"
     tools:context=".MainActivity">
 
-    <com.google.android.material.appbar.AppBarLayout
-        android:id="@+id/app_bar"
-        android:fitsSystemWindows="true"
-        android:layout_height="@dimen/app_bar_height"
+    <androidx.appcompat.widget.Toolbar
+        android:id="@+id/toolbar"
         android:layout_width="match_parent"
-        android:theme="@style/AppTheme.AppBarOverlay">
+        android:layout_height="wrap_content"
+        android:background="?attr/colorPrimary"
+        android:minHeight="?attr/actionBarSize"
+        android:theme="?attr/actionBarTheme">
 
-        <com.google.android.material.appbar.CollapsingToolbarLayout
-            android:id="@+id/toolbar_layout"
-            android:fitsSystemWindows="true"
+        <TextView
             android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            app:toolbarId="@+id/toolbar"
-            app:layout_scrollFlags="scroll|exitUntilCollapsed"
-            app:contentScrim="?attr/colorPrimary">
-
-            <androidx.appcompat.widget.Toolbar
-                android:id="@+id/toolbar"
-                android:layout_height="?attr/actionBarSize"
-                android:layout_width="match_parent"
-                app:layout_collapseMode="pin"
-                app:popupTheme="@style/AppTheme.PopupOverlay" />
+            android:layout_height="wrap_content"
+            android:text="@string/app_name"
+            android:textColor="@android:color/primary_text_dark"
+            android:textSize="18sp" />
+    </androidx.appcompat.widget.Toolbar>
 
-        </com.google.android.material.appbar.CollapsingToolbarLayout>
-    </com.google.android.material.appbar.AppBarLayout>
 
-    <include layout="@layout/content_scrolling" />
+    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+        android:id="@+id/swipe_refresh"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior"
+        tools:context=".MainActivity"
+        tools:showIn="@layout/activity_main">
 
-    <com.google.android.material.floatingactionbutton.FloatingActionButton
-        android:id="@+id/fab"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_margin="@dimen/fab_margin"
-        app:layout_anchor="@id/app_bar"
-        app:layout_anchorGravity="bottom|end"
-        app:srcCompat="@android:drawable/ic_dialog_email" />
+        <ScrollView
+            android:layout_width="match_parent"
+            android:layout_height="match_parent">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical" >
+
+                <TextView
+                    android:id="@+id/main_text"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_margin="@dimen/text_margin"
+                    android:text="@string/large_text" />
+            </LinearLayout>
+        </ScrollView>
 
-</androidx.coordinatorlayout.widget.CoordinatorLayout>
\ No newline at end of file
+    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
+</LinearLayout>
\ No newline at end of file

app/src/main/res/layout/content_scrolling.xml

-<?xml version="1.0" encoding="utf-8"?>
-<androidx.core.widget.NestedScrollView
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    app:layout_behavior="@string/appbar_scrolling_view_behavior"
-    tools:showIn="@layout/activity_main"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:context=".MainActivity">
-
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_margin="@dimen/text_margin"
-        android:text="@string/large_text" />
-
-</androidx.core.widget.NestedScrollView>
\ No newline at end of file

app/src/main/res/values/colors.xml

 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <color name="colorPrimary">#008577</color>
-    <color name="colorPrimaryDark">#00574B</color>
-    <color name="colorAccent">#D81B60</color>
+    <color name="colorPrimary">#006633</color>
+    <color name="colorPrimaryDark">#006633</color>
+    <color name="colorAccent">#FBC02D</color>
 </resources>