Add AppIntro activity

app/src/main/AndroidManifest.xml

@@ -13,6 +13,10 @@
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
 
+        <activity
+            android:name=".IntroActivity"
+            android:label="@string/title_intro" />
+
         <activity
             android:name=".SettingsActivity"
             android:parentActivityName=".MainActivity"

app/src/main/java/net/underdesk/circolapp/IntroActivity.kt

@@ -0,0 +1,48 @@
+package net.underdesk.circolapp
+
+import android.os.Bundle
+import androidx.core.content.ContextCompat
+import androidx.fragment.app.Fragment
+import com.github.appintro.AppIntro2
+import com.github.appintro.AppIntroFragment
+import com.github.appintro.AppIntroPageTransformerType
+import net.underdesk.circolapp.fragments.intro.SchoolSelectionFragment
+
+class IntroActivity : AppIntro2() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        isWizardMode = true
+
+        setTransformer(AppIntroPageTransformerType.Depth)
+
+        addSlide(
+            AppIntroFragment.newInstance(
+                title = getString(R.string.title_intro),
+                description = getString(R.string.activity_intro_welcome_description),
+                imageDrawable = R.mipmap.ic_launcher,
+                backgroundColor = ContextCompat.getColor(this, R.color.colorPrimary)
+            )
+        )
+        addSlide(SchoolSelectionFragment.newInstance())
+        addSlide(
+            AppIntroFragment.newInstance(
+                title = getString(R.string.activity_intro_last_slide_title),
+                description = getString(R.string.activity_intro_last_slide_description),
+                backgroundColor = ContextCompat.getColor(this, R.color.colorPrimary)
+            )
+        )
+    }
+
+    override fun onSkipPressed(currentFragment: Fragment?) {
+        super.onSkipPressed(currentFragment)
+        // Decide what to do when the user clicks on "Skip"
+        finish()
+    }
+
+    override fun onDonePressed(currentFragment: Fragment?) {
+        super.onDonePressed(currentFragment)
+        // Decide what to do when the user clicks on "Done"
+        finish()
+    }
+}

app/src/main/java/net/underdesk/circolapp/MainActivity.kt

@@ -76,7 +76,7 @@ class MainActivity : AppCompatActivity(), CircularLetterAdapter.AdapterCallback
         PollWork.enqueue(this)
 
         if (getPreferences(Context.MODE_PRIVATE).getBoolean("first_start", true)) {
-            startInfoActivity()
+            startIntroActivity()
 
             getPreferences(Context.MODE_PRIVATE).edit().apply {
                 putBoolean("first_start", false)
@@ -177,6 +177,10 @@ class MainActivity : AppCompatActivity(), CircularLetterAdapter.AdapterCallback
             .start(this@MainActivity)
     }
 
+    private fun startIntroActivity() {
+        startActivity(Intent(this, IntroActivity::class.java))
+    }
+
     private fun loadDarkTheme() {
         val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this)
 

app/src/main/java/net/underdesk/circolapp/fragments/intro/SchoolSelectionFragment.kt

@@ -0,0 +1,79 @@
+package net.underdesk.circolapp.fragments.intro
+
+import android.content.SharedPreferences
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ArrayAdapter
+import androidx.fragment.app.Fragment
+import androidx.preference.PreferenceManager
+import com.github.appintro.SlidePolicy
+import com.tiper.MaterialSpinner
+import kotlinx.android.synthetic.main.fragment_school_selection.view.*
+import net.underdesk.circolapp.R
+import net.underdesk.circolapp.server.ServerAPI
+
+class SchoolSelectionFragment : Fragment(), SlidePolicy, MaterialSpinner.OnItemSelectedListener {
+    private lateinit var preferenceManager: SharedPreferences
+    private var schoolSelected = false
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? = inflater.inflate(R.layout.fragment_school_selection, container, false)
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        preferenceManager = PreferenceManager.getDefaultSharedPreferences(requireContext())
+
+        val items = getSchoolListArray()
+        val adapter =
+            ArrayAdapter(requireContext(), android.R.layout.simple_spinner_dropdown_item, items)
+
+        view.school_selection_spinner.adapter = adapter
+        view.school_selection_spinner.onItemSelectedListener = this
+    }
+
+    private fun getSchoolListArray(): ArrayList<String> {
+        val servers = ServerAPI.Companion.Servers.values()
+        val entryNames = arrayListOf<String>()
+
+        for (i in servers.indices) {
+            entryNames.add(ServerAPI.getServerName(servers[i]))
+        }
+
+        return entryNames
+    }
+
+    override fun onItemSelected(parent: MaterialSpinner, view: View?, position: Int, id: Long) {
+        val editor = preferenceManager.edit()
+        editor.putString("school", position.toString())
+        editor.apply()
+
+        ServerAPI.changeServer(position)
+        schoolSelected = true
+
+        parent.error = null
+    }
+
+    override fun onNothingSelected(parent: MaterialSpinner) {
+        // Intentionally empty
+    }
+
+    override val isPolicyRespected: Boolean
+        get() = schoolSelected
+
+    override fun onUserIllegallyRequestedNextPage() {
+        view?.school_selection_spinner?.error =
+            getString(R.string.activity_intro_school_selection_error)
+    }
+
+    companion object {
+        fun newInstance(): SchoolSelectionFragment {
+            return SchoolSelectionFragment()
+        }
+    }
+}

app/src/main/java/net/underdesk/circolapp/server/ServerAPI.kt

@@ -73,9 +73,10 @@ class ServerAPI(
         }
 
         fun getInstance(context: Context): ServerAPI {
+            val preferenceManager = PreferenceManager.getDefaultSharedPreferences(context)
+
             val server = Servers.values()[
-                    PreferenceManager.getDefaultSharedPreferences(context).getString("school", "0")
-                        ?.toInt() ?: 0
+                    preferenceManager.getString("school", "0")?.toInt() ?: 0
             ]
 
             return instance ?: synchronized(this) {

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

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingTop="@dimen/appintro_statusbar_height"
+    android:paddingBottom="@dimen/appintro2_bottombar_height"
+    android:background="@color/colorPrimary">
+
+    <TextView
+        android:id="@+id/school_selection_title"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:gravity="center"
+        app:layout_constraintVertical_weight="2"
+        app:layout_constraintBottom_toTopOf="@+id/school_selection_spinner"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_chainStyle="spread"
+        style="@style/AppIntroDefaultHeading"
+        android:text="@string/activity_intro_school_selection_title" />
+
+    <com.tiper.MaterialSpinner
+        android:id="@+id/school_selection_spinner"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="16dp"
+        android:layout_marginEnd="16dp"
+        android:hint="@string/activity_intro_school_selection_hint"
+        style="@style/Widget.MaterialComponents.TextInputLayout.FilledBox.Dense"
+        app:spinnerMode="bottomsheet"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/school_selection_note"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:autoLink="web"
+        app:layout_constraintVertical_weight="3"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/school_selection_spinner"
+        style="@style/AppIntroDefaultText"
+        android:text="@string/activity_intro_school_selection_description" />
+
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/values-it/strings.xml

@@ -4,6 +4,7 @@
     <string name="title_favourites">Preferiti</string>
     <string name="title_reminders">Promemoria</string>
     <string name="title_settings">Impostazioni</string>
+    <string name="title_intro">Benvenuto in Circolapp</string>
 
     <string name="menu_about">Informazioni</string>
     <string name="menu_search">Cerca</string>
@@ -47,6 +48,14 @@
     <string name="activity_info_source_code">Codice sorgente</string>
     <string name="activity_info_source_code_description">Puoi scaricare il codice sorgente da &lt;a href="https://github.com/Matte23/circolapp"&gt;https://github.com/Matte23/circolapp&lt;/a&gt;</string>
 
+    <string name="activity_intro_welcome_description">Con Circolapp puoi rimanere aggiornato sulle circolari della tua scuola. Visualizzare e scaricare le circolari non è mai stato così semplice</string>
+    <string name="activity_intro_school_selection_title">Inizia scegliendo la tua scuola</string>
+    <string name="activity_intro_school_selection_description">Puoi modificare la tua scelta in un secondo momento nelle impostazioni</string>
+    <string name="activity_intro_school_selection_error">Scegli una scuola</string>
+    <string name="activity_intro_school_selection_hint">Scuola</string>
+    <string name="activity_intro_last_slide_title">Hai finito</string>
+    <string name="activity_intro_last_slide_description">Adesso puoi iniziare ad usare Circolapp</string>
+
     <string name="dialog_install_pdf_reader_title">Lettore PDF non installato</string>
     <string name="dialog_install_pdf_reader_content">Installa un lettore di PDF per aprire le circolari</string>
 

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

@@ -4,6 +4,7 @@
     <string name="title_favourites">Favourites</string>
     <string name="title_reminders">Reminders</string>
     <string name="title_settings">Settings</string>
+    <string name="title_intro">Welcome to Circolapp</string>
 
     <string name="menu_about">About</string>
     <string name="menu_search">Search</string>
@@ -48,6 +49,14 @@
     <string name="activity_info_source_code">Source code</string>
     <string name="activity_info_source_code_description">The source code can be downloaded from &lt;a href="https://github.com/Matte23/circolapp"&gt;https://github.com/Matte23/circolapp&lt;/a&gt;</string>
 
+    <string name="activity_intro_welcome_description">With Circolapp you can stay updated on the circulars of your school. Viewing and downloading circulars has never been easier</string>
+    <string name="activity_intro_school_selection_title">Start by choosing your school</string>
+    <string name="activity_intro_school_selection_description">You can change your choice later in the settings</string>
+    <string name="activity_intro_school_selection_error">Please select a school</string>
+    <string name="activity_intro_school_selection_hint">School</string>
+    <string name="activity_intro_last_slide_title">You\'re done</string>
+    <string name="activity_intro_last_slide_description">Now you can start using Circolapp</string>
+
     <string name="dialog_install_pdf_reader_title">PDF reader not found</string>
     <string name="dialog_install_pdf_reader_content">Please install an external application to open circular letters</string>