adds help page

- urls are now auto-generated from android
  and no longer self-handled
- long-clicking a message starts decryption
  process, short clicking does nothing right
  now
- only first three messages are decrypted
  on app load, to improve performance
- fragment structure now inside a list view
  which makes the listview inside scrollable
  automatically

app/.gitignore

@@ -1 +1,2 @@
 /build
+/release

app/build.gradle

@@ -8,10 +8,10 @@ android {
 
     defaultConfig {
         applicationId "com.maenle.bump"
-        minSdk 29
+        minSdk 26
         targetSdk 30
-        versionCode 1
-        versionName "1.0"
+        versionCode 4
+        versionName "0.1.2"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }

app/src/main/AndroidManifest.xml

@@ -2,7 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     package="com.maenle.bump"
-    android:versionName="initial">
+    android:versionName="0.1_alpha">
 
     <uses-feature android:name="android.hardware.camera.any" />
     <uses-permission android:name="android.permission.CAMERA" />
@@ -23,13 +23,13 @@
             android:exported="false">
             <intent-filter>
                 <action android:name="com.google.firebase.MESSAGING_EVENT"/>
+                <action android:name="android.intent.action.RESPOND_VIA_MESSAGE"/>
             </intent-filter>
         </service>
 
         <meta-data
             android:name="com.google.firebase.messaging.default_notification_icon"
             android:resource="@drawable/ic_stat_name"/>
-
         <meta-data
             android:name="com.google.firebase.messaging.default_notification_color"
             android:resource="@color/black"/> <!-- [END fcm_default_icon] -->
@@ -50,6 +50,10 @@
 
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+            <intent-filter>
+                <action android:name=".ui.MainActivity" />
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
         </activity>
     </application>
 

app/src/main/java/com/maenle/bump/MyFirebaseMessagingService.kt

@@ -3,6 +3,7 @@ package com.maenle.bump
 
 import android.app.NotificationManager
 import android.util.Log
+import androidx.core.app.NotificationCompat
 import androidx.core.content.ContextCompat
 import com.maenle.bump.util.sendNotification
 import com.google.firebase.messaging.FirebaseMessagingService
@@ -16,27 +17,32 @@ class MyFirebaseMessagingService : FirebaseMessagingService() {
      *
      * @param remoteMessage Object representing the message received from Firebase Cloud Messaging.
      */
-    // [START receive_message]
     override fun onMessageReceived(remoteMessage: RemoteMessage) {
         // Not getting messages here? See why this may be: https://goo.gl/39bRNJ
         // Log.d(TAG, "From: ${remoteMessage.from}")
 
-        // TODO Step 3.5 check messages for data
         // Check if message contains a data payload.
+        var body: String? = null;
+        var header: String? = null;
         remoteMessage.data.let {
-            // Log.d(TAG, "Message data payload: " + remoteMessage.data)
+            val bump = BumpProcessor.getInstance(applicationContext)
+            Log.d(TAG, "Message data payload: " + remoteMessage.data)
+            val a = remoteMessage.data.keys
+            val value = remoteMessage.data["data"]
+            value?.let {
+                body = bump.decryptMessage(it)
+            }
         }
 
-        // TODO Step 3.6 check messages for notification and call sendNotification
-        // Check if message contains a notification payload.
         remoteMessage.notification?.let {
-            // Log.d(TAG, "Message Notification Body: ${it.body}")
-            sendNotification(it.body!!)
+            header = it.body
         }
-    }
-    // [END receive_message]
 
-    //TODO Step 3.2 log registration token
+        sendNotification(header, body)
+
+    }
+
+    // log registration token
     // [START on_new_token]
     /**
      * Called if InstanceID token is updated. This may occur if the security of
@@ -63,14 +69,11 @@ class MyFirebaseMessagingService : FirebaseMessagingService() {
         bump.setFirebaseToken(baseContext)
     }
 
-    /**
-     * Create and show a simple notification containing the received FCM message.
-     *
-     * @param messageBody FCM message body received.
-     */
-    private fun sendNotification(messageBody: String) {
+    private fun sendNotification(messageHeader: String?, messageBody: String?) {
+
         val notificationManager = ContextCompat.getSystemService(applicationContext, NotificationManager::class.java) as NotificationManager
-        notificationManager.sendNotification(messageBody, applicationContext)
+        notificationManager.sendNotification(messageHeader, messageBody, applicationContext)
+
     }
 
     companion object {

app/src/main/java/com/maenle/bump/ui/FirstFragment.kt

@@ -2,29 +2,27 @@ package com.maenle.bump.ui
 
 import android.app.NotificationChannel
 import android.app.NotificationManager
+import android.content.Intent
 import android.content.res.Configuration
-import android.graphics.Color
-import android.os.Bundle
-import androidx.fragment.app.Fragment
-import androidx.navigation.fragment.findNavController
-import com.google.firebase.messaging.FirebaseMessaging
-import com.maenle.bump.R
-import com.maenle.bump.databinding.FragmentFirstBinding
-import com.maenle.bump.util.*
-import com.google.zxing.WriterException
-
 import android.graphics.Bitmap
-import android.util.Log
+import android.graphics.Color
+import android.net.Uri
+import android.os.Bundle
 import android.view.*
 import androidmads.library.qrgenearator.QRGContents
 import androidmads.library.qrgenearator.QRGEncoder
-
+import androidx.fragment.app.Fragment
+import androidx.navigation.fragment.findNavController
+import com.google.firebase.messaging.FirebaseMessaging
+import com.google.zxing.WriterException
+import com.maenle.bump.R
+import com.maenle.bump.databinding.FragmentFirstBinding
+import com.maenle.bump.util.*
 import com.maenle.bump.util.Display
+import org.json.JSONArray
+import org.json.JSONObject
 
 
-/**
- * A simple [Fragment] subclass as the default destination in the navigation.
- */
 class FirstFragment : Fragment() {
 
     private var _binding: FragmentFirstBinding? = null
@@ -53,16 +51,10 @@ class FirstFragment : Fragment() {
             getString(R.string.bump_notification_channel_name)
         )
 
-        /*
-        val notificationManager = ContextCompat.getSystemService(
-            requireContext(),
-            NotificationManager::class.java
-        ) as NotificationManager
-        notificationManager.sendNotification(getString(R.string.notification), requireContext())
-         */
-
         subscribeTopic()
 
+        bump.logUpdateCallback = { log -> updateMessageList(log) }
+        updateMessageList(bump.log)
         return binding.root
     }
 
@@ -84,6 +76,7 @@ class FirstFragment : Fragment() {
                 message?.let { binding.textviewScan.text = it.sender.replace("-", "-\u200b")}
             }
         }
+
         message?.let { binding.textviewScan.text = it.sender.replace("-", "-\u200b")}
         message?.let { binding.textviewEncryption.text = "-" + it.password.replace("-", "-\u200b")}
         message?.let {binding.idIVQrcode.setImageBitmap(generateQrCode(it.code))}
@@ -152,8 +145,42 @@ class FirstFragment : Fragment() {
         return newBitmap
     }
 
+    private fun updateMessageList(log: JSONArray) {
+        val messages: MutableList<MessageItem> = mutableListOf()
+        val adapter = NotificationAdapter(requireContext(), messages)
+        binding.nrMessages.text = log.length().toString()
+        for (l in log.length() - 1 downTo 0) {
+            val m = log[l] as JSONObject
+            val msg = MessageItem(m.get("title") as String, message = "...")
+            messages.add(msg)
+            bump.asyncDecryptMessage(m.get("data") as String, messages.size-1) { data, location ->
+                    messages[location].message = data
+                    adapter.notifyDataSetChanged()
+            }
+        }
+
+        binding.notificationList.adapter = adapter
+        adapter.notifyDataSetChanged()
+        binding.notificationList.setOnItemClickListener { adapterView, view, i, l ->
+            run {
+                if (messages[i].header.startsWith("http")) {
+                    val browserIntent =
+                        Intent(Intent.ACTION_VIEW, Uri.parse(messages[i].header))
+                    startActivity(browserIntent)
+                }
+            }
+        }
+        binding.notificationList.setOnItemLongClickListener { adapterView, view, i, l ->
+            messages[i].encrypted?.let {
+                messages[i].message = bump.decryptMessage(messages[i].encrypted!!)
+            }
+            adapter.notifyDataSetChanged()
+            true
+        }
+    }
+
+
     private fun subscribeTopic() {
-        // [START subscribe_topic]
         FirebaseMessaging.getInstance().subscribeToTopic(TOPIC)
             .addOnCompleteListener { task ->
                 var curmessage = getString(R.string.message_subscribed)
@@ -177,3 +204,7 @@ class FirstFragment : Fragment() {
         _binding = null
     }
 }
+
+class MessageItem(public val title: String, var message: String = "...", var encrypted: String? = null) {
+    public var header: String = title
+}

app/src/main/java/com/maenle/bump/ui/MainActivity.kt

@@ -1,16 +1,23 @@
 package com.maenle.bump.ui
 
+import android.content.Intent
+import android.graphics.Color
+import android.net.Uri
 import android.os.Bundle
-import com.google.android.material.snackbar.Snackbar
+import android.text.SpannableString
+import android.text.style.ForegroundColorSpan
+import android.util.Log
+import android.view.Menu
+import android.view.MenuItem
 import androidx.appcompat.app.AppCompatActivity
 import androidx.navigation.findNavController
 import androidx.navigation.ui.AppBarConfiguration
 import androidx.navigation.ui.navigateUp
 import androidx.navigation.ui.setupActionBarWithNavController
-import android.view.Menu
-import android.view.MenuItem
 import com.maenle.bump.R
 import com.maenle.bump.databinding.ActivityMainBinding
+import com.maenle.bump.util.BumpProcessor
+
 
 class MainActivity : AppCompatActivity() {
 
@@ -29,11 +36,31 @@ class MainActivity : AppCompatActivity() {
         appBarConfiguration = AppBarConfiguration(navController.graph)
         setupActionBarWithNavController(navController, appBarConfiguration)
 
+        val bundle = intent.extras
+        if (bundle != null) {
+            Log.d("MainActivity", bundle.toString())
+        }
+
+    }
+
+    fun showHelp() {
+        val browserIntent = Intent(Intent.ACTION_VIEW, Uri.parse("http://raphael.maenle.net/post/projects/bump/"));
+        startActivity(browserIntent);
     }
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
-        // Inflate the menu; this adds items to the action bar if it is present.
-        // menuInflater.inflate(R.menu.menu_main, menu)
+        menuInflater.inflate(R.menu.menu_main, menu)
+        for (i in 0 until menu.size()) {
+            val item = menu.getItem(i)
+            val spanString = SpannableString(menu.getItem(i).title.toString())
+            spanString.setSpan(
+                ForegroundColorSpan(Color.WHITE),
+                0,
+                spanString.length,
+                0
+            ) //fix the color to white
+            item.title = spanString
+        }
         return true
     }
 
@@ -42,9 +69,18 @@ class MainActivity : AppCompatActivity() {
         // automatically handle clicks on the Home/Up button, so long
         // as you specify a parent activity in AndroidManifest.xml.
         return when (item.itemId) {
-            R.id.action_settings -> true
+            R.id.action_settings -> {true}
+            R.id.action_clear_log ->  {
+                BumpProcessor.clearLog(applicationContext)
+                true
+            }
+            R.id.action_info -> {
+                showHelp()
+                true
+            }
             else -> super.onOptionsItemSelected(item)
         }
+
     }
 
     override fun onSupportNavigateUp(): Boolean {

app/src/main/java/com/maenle/bump/util/BumpProcessor.kt

@@ -4,20 +4,24 @@ import android.content.Context
 import android.os.Handler
 import android.os.Looper
 import android.util.Log
-import com.google.firebase.ktx.Firebase
 import com.google.firebase.messaging.FirebaseMessaging
 import org.json.JSONArray
 import org.json.JSONObject
 import java.io.File
+import kotlin.concurrent.thread
 
 class BumpProcessor constructor(context: Context) {
 
-    private var rest: RestSingleton = RestSingleton.getInstance(context)
-    private lateinit var log: JSONArray
+    private val rest: RestSingleton = RestSingleton.getInstance(context)
+    private val local = LocalData(context)
+    private var _log: JSONArray
+    private val messenger = local.code?.let { MessageProcessor(it) }
 
+    var logUpdateCallback: ((JSONArray)->Unit)? = null
 
     init {
-        log = getLog(context)
+        _log = getLogFromFile(context)
+        startUpdateHandler(context)
     }
 
     companion object {
@@ -29,22 +33,50 @@ class BumpProcessor constructor(context: Context) {
                     INSTANCE = it
                 }
             }
+        fun clearLog(context: Context) {
+            val logFile = File(context.filesDir, ".bump_log")
+            logFile.writeText("")
+        }
+
+    }
+
+    val log: JSONArray
+        get() {
+        return _log
+    }
+
+    fun asyncDecryptMessage(message: String, location: Int, callback: (String, Int) -> Unit) {
+        thread(start = true) {
+            val decrypt = decryptMessage(message)
+            Handler(Looper.getMainLooper()).post {callback( decrypt, location)}
+        }
+    }
+
+    fun decryptMessage(message: String): String {
+        return messenger!!.decrypt(message)
     }
 
     private fun updateLog(context: Context, list: JSONArray) {
+        _log = getLogFromFile(context)
+        var change = false
         for(i in 0 until list.length()) {
             var exists = false
-            for(j in 0 until log.length()) {
-                if (list[i] == log[j]) {
+            for(j in 0 until _log.length()) {
+                if (list[i].toString() == _log[j].toString()) {
                     exists = true
-                    continue
+                    break
                 }
             }
-            exists.let {
-                log.put(list[i])
+            if(!exists) {
+                _log.put(list[i])
                 addToLog(context, list[i] as JSONObject)
+                change = true
             }
         }
+
+        if(change) {
+            logUpdateCallback?.invoke(_log)
+        }
     }
 
     private fun getSecret(context: Context):String? {
@@ -52,11 +84,11 @@ class BumpProcessor constructor(context: Context) {
         return local.code
     }
 
-    fun startUpdateHandler(context: Context) {
-
-        val delay: Long = 30_000 //milliseconds
+    private fun startUpdateHandler(context: Context) {
+        val delay: Long = 60_000 //milliseconds
         val handler = Handler(Looper.getMainLooper())
 
+        updateFromServer(context)
         handler.postDelayed(object : Runnable {
             override fun run() {
                 updateFromServer(context)
@@ -65,7 +97,7 @@ class BumpProcessor constructor(context: Context) {
         }, delay)
     }
 
-    private fun updateFromServer(context: Context) {
+    fun updateFromServer(context: Context) {
         LocalData(context).code?.let {
             val messenger = MessageProcessor(it)
             rest.list(messenger.sender) { list -> updateLog(context, list) }
@@ -74,7 +106,7 @@ class BumpProcessor constructor(context: Context) {
 
     private fun addToLog(context: Context, line: JSONObject) {
         val logFile = File(context.filesDir, ".bump_log")
-        logFile.appendText(line.toString())
+        logFile.appendText(line.toString() + "\n")
     }
 
     fun addSecret(context: Context, newCode: String): Boolean {
@@ -94,7 +126,7 @@ class BumpProcessor constructor(context: Context) {
         return newCode.length == validChars && newCode.length >= 32
     }
 
-    private fun getLog(context: Context): JSONArray {
+    private fun getLogFromFile(context: Context): JSONArray {
         val logFile = File(context.filesDir, ".bump_log")
         val log = JSONArray()
         !logFile.exists().let {

app/src/main/java/com/maenle/bump/util/MessageProcessor.kt

@@ -1,5 +1,6 @@
 package com.maenle.bump.util
 
+import android.util.Log
 import java.util.Base64
 import javax.crypto.spec.PBEKeySpec
 import javax.crypto.SecretKeyFactory
@@ -77,6 +78,7 @@ class MessageProcessor(code: String, private val salt: ByteArray? = null) {
             super.splitMessage(messageRaw)
         }
         fun validateAndDecryptWith(password: String, timeToLive: Long = TIME_TO_LIVE): String {
+            try {
                 val fernetKey = deriveMessageKeyFromPassword(password)
                 val validator: Validator<String> = object : StringValidator {
                     override fun getTimeToLive(): TemporalAmount {
@@ -84,6 +86,11 @@ class MessageProcessor(code: String, private val salt: ByteArray? = null) {
                     }
                 }
                 return token.validateAndDecrypt(fernetKey, validator)
+            } catch (e: Throwable) {
+                e.message?.let { Log.d(TAG, it) }
+            }
+            return ""
+
         }
     }
 

app/src/main/java/com/maenle/bump/util/NotificationAdapter.kt

@@ -0,0 +1,45 @@
+package com.maenle.bump.util
+
+import android.content.Context
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ArrayAdapter
+import android.widget.TextView
+import com.maenle.bump.R
+import com.maenle.bump.ui.MessageItem
+
+
+class NotificationAdapter(context: Context, messages: MutableList<MessageItem>) :
+    ArrayAdapter<MessageItem?>(context, 0, messages as List<MessageItem?>) {
+    val bump = BumpProcessor(context)
+
+    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+
+        // Get the data item for this position
+        var view: View? = convertView
+        val message: MessageItem? = getItem(position)
+
+        // Check if an existing view is being reused, otherwise inflate the view
+        if (view == null) {
+            view = LayoutInflater.from(context).inflate(R.layout.notification_item, parent, false)
+        }
+
+        // Lookup view for data population
+        val title = view?.findViewById(R.id.title) as TextView
+        val data = view.findViewById(R.id.data) as TextView
+
+        // Populate the data into the template view using the data object
+        if (message != null) {
+            title.text = message.title
+            data.text = message.message
+            if(data.text == "") {
+                data.text = "-"
+            }
+        }
+
+        // Return the completed view to render on screen
+        return view
+    }
+}

app/src/main/java/com/maenle/bump/util/NotificationUtil.kt

@@ -1,6 +1,5 @@
 package com.maenle.bump.util
 
-import android.annotation.SuppressLint
 import android.app.NotificationManager
 import android.app.PendingIntent
 import android.content.Context
@@ -10,16 +9,32 @@ import androidx.core.app.NotificationCompat
 import com.maenle.bump.ui.MainActivity
 import com.maenle.bump.R
 
-// Notification ID.
-private val NOTIFICATION_ID = 0
 
-@SuppressLint("WrongConstant")
-fun NotificationManager.sendNotification(messageBody: String, applicationContext: Context) {
+
+
+// Notification ID.
+private const val NOTIFICATION_ID = 0
+
+fun NotificationManager.sendNotification(messageHeader: String?, messageBody: String?, applicationContext: Context) {
+    var title = applicationContext.getString(R.string.notification_title)
+    var body = ""
+
+    if(messageBody != null) {
+        if(messageHeader != null) {
+            title = messageHeader
+        }
+        body = messageBody
+    } else if(messageHeader != null)  {
+        body = messageHeader
+    }
+
+    sendParsedNotification(title, body, applicationContext)
+}
+
+fun NotificationManager.sendParsedNotification(messageHeader: String, messageBody: String, applicationContext: Context) {
     // Create the content intent for the notification, which launches
     // this activity
-    // TODO: Step 1.11 create intent
     val contentIntent = Intent(applicationContext, MainActivity::class.java)
-    // TODO: Step 1.12 create PendingIntent
     val contentPendingIntent = PendingIntent.getActivity(
         applicationContext,
         NOTIFICATION_ID,
@@ -27,43 +42,39 @@ fun NotificationManager.sendNotification(messageBody: String, applicationContext
         PendingIntent.FLAG_UPDATE_CURRENT
     )
 
-    // TODO: Step 2.0 add style
     val eggImage = BitmapFactory.decodeResource(
         applicationContext.resources,
         R.drawable.ic_stat_name
     )
 
-    // TODO: Step 1.2 get an instance of NotificationCompat.Builder
+    val intent = Intent(applicationContext, this.javaClass)
+    val action =
+        PendingIntent.getBroadcast(applicationContext, 0, intent, 0)
     // Build the notification
     val builder = NotificationCompat.Builder(
         applicationContext,
         applicationContext.getString(R.string.bump_notification_channel_id)
     )
 
-        // TODO: Step 1.3 set title, text and icon to builder
         .setSmallIcon(R.drawable.ic_stat_name)
-        .setContentTitle(applicationContext
-            .getString(R.string.notification_title))
+        .setContentTitle(messageHeader)
         .setContentText(messageBody)
 
-        // TODO: Step 1.13 set content intent
+        // set content intent
         .setContentIntent(contentPendingIntent)
         .setAutoCancel(true)
 
-        // TODO: Step 2.1 add style to builder
+        // add style to builder
         .setLargeIcon(eggImage)
 
-        // TODO: Step 2.5 set priority
+        // set priority
         .setPriority(NotificationCompat.PRIORITY_HIGH)
-    // TODO: Step 1.4 call notify
+        .addAction(0, "Action", action)
+
+    // notify
     notify(NOTIFICATION_ID, builder.build())
 }
 
-// TODO: Step 1.14 Cancel all notifications
-/**
- * Cancels all notifications.
- *
- */
 fun NotificationManager.cancelNotifications() {
     cancelAll()
 }

app/src/main/java/com/maenle/bump/util/RestSingleton.kt

@@ -33,7 +33,7 @@ class RestSingleton constructor(context: Context){
         val url = URL + "list/"
         val data = JSONObject()
         data.put("sender", sender)
-        data.put("minutes", (60*24*365*100).toString())
+        data.put("minutes", (60*24).toString())
         val jsonRequest = JsonObjectRequest(Request.Method.POST, url,
             data,
             { response ->
@@ -100,7 +100,6 @@ class RestSingleton constructor(context: Context){
 
     }
 
-
     private val requestQueue: RequestQueue by lazy {
         // applicationContext is key, it keeps you from leaking the
         // Activity or BroadcastReceiver if someone passes one in.

app/src/main/res/drawable/rounded_card.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="@color/cardview_dark_background"/>
+    <stroke android:width="8dp" android:color="#000000FF" />
+    <corners android:radius="10dp"/>
+    <padding android:left="0dp" android:top="0dp" android:right="0dp" android:bottom="0dp" />
+</shape>

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

@@ -6,13 +6,20 @@
     android:layout_height="match_parent"
     tools:context="com.maenle.bump.ui.FirstFragment">
 
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:animateLayoutChanges="true"
+        android:orientation="vertical">
+
     <TextView
         android:id="@+id/textview_scan"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="@string/current_sender"
-        android:layout_marginTop="40dp"
+        android:layout_marginTop="30dp"
         android:textSize="20sp"
+        android:layout_gravity="center"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
@@ -36,7 +43,8 @@
         android:id="@+id/idIVQrcode"
         android:layout_width="300dp"
         android:layout_height="300dp"
-        android:layout_centerHorizontal="true"
+        android:gravity="center"
+        android:layout_gravity="center"
         android:contentDescription="@string/qr_code"
         android:layout_marginTop="20dp"
         android:visibility="gone"
@@ -45,10 +53,12 @@
         app:layout_constraintStart_toStartOf="parent"/>
 
     <LinearLayout
+        android:id="@+id/buttons"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:orientation="horizontal"
         android:layout_marginTop="20dp"
+        android:layout_gravity="center"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintTop_toBottomOf="@id/idIVQrcode"
         app:layout_constraintStart_toStartOf="parent">
@@ -68,4 +78,40 @@
             android:textColor="@color/white"
             android:text="@string/view_sender" />
     </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/header"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:layout_marginTop="20dp"
+        android:layout_gravity="center"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/buttons"
+        app:layout_constraintStart_toStartOf="parent">
+    <TextView
+        android:id="@+id/nr_messages"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/default_nr_messages"
+        android:layout_marginEnd="10dp"
+        android:textSize="20sp"/>
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/message_header"
+        android:textSize="20sp"/>
+    </LinearLayout>
+
+    <ListView
+        android:id="@+id/notification_list"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:animateLayoutChanges="true"
+        android:layout_weight="1"
+        android:layout_margin="20sp"
+        android:scrollbars="vertical"
+        app:layout_constraintTop_toBottomOf="@id/header">
+    </ListView>
+    </LinearLayout>
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="@drawable/rounded_card"
+    android:padding="10dp"
+    android:paddingStart="20dp"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/title"
+        android:autoLink="web"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:ellipsize="marquee"
+        android:singleLine="true"
+        android:text="title"
+        android:textSize="20sp" />
+
+    <TextView
+        android:id="@+id/data"
+        android:autoLink="web"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="no data\nfor\nme"
+        android:textSize="12sp"
+        android:ellipsize="marquee"/>
+
+</LinearLayout>

app/src/main/res/menu/menu_main.xml

@@ -3,8 +3,18 @@
     xmlns:tools="http://schemas.android.com/tools"
     tools:context="com.maenle.bump.ui.MainActivity">
     <item
-        android:id="@+id/action_settings"
+        android:id="@+id/action_clear_log"
         android:orderInCategory="100"
+        android:title="@string/action_clear_log"
+        app:showAsAction="never" />
+    <item
+        android:id="@+id/action_info"
+        android:orderInCategory="101"
+        android:title="@string/action_info"
+        app:showAsAction="never" />
+    <item
+        android:id="@+id/action_settings"
+        android:orderInCategory="102"
         android:title="@string/action_settings"
         app:showAsAction="never" />
 </menu>

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

@@ -1,6 +1,8 @@
 <resources>
     <string name="app_name">Bump</string>
     <string name="action_settings">Settings</string>
+    <string name="action_info">Help</string>
+    <string name="action_clear_log">Clear Log</string>
     <!-- Strings used for fragments for navigation -->
     <string name="main_fragment_label">Bump</string>
     <string name="second_fragment_label">Second Fragment</string>
@@ -13,6 +15,8 @@
     <string name="scan_sender">Scan</string>
     <string name="camera_fragment_label">Scan Sender QR</string>
     <string name="preference_file_key">code_file_key</string>
+    <string name="message_header">messages received:</string>
+    <string name="default_nr_messages">0</string>
     <string name="code_key">code_key</string>
     <string name="notification_title">Bump</string>
     <string name="bump_notification_channel_id">bump_id</string>

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

@@ -12,6 +12,7 @@
         <!-- Status bar color. -->
         <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
         <!-- Customize your theme here. -->
+        <item name="actionMenuTextColor">@color/white</item>
     </style>
 
     <style name="Theme.BumpForAndroid.NoActionBar">

build.gradle

@@ -5,7 +5,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath "com.android.tools.build:gradle:7.0.4"
+        classpath 'com.android.tools.build:gradle:7.1.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.0"
         classpath 'com.google.gms:google-services:4.3.2'  // Google Services plugin
 

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Sat Dec 11 13:26:50 CET 2021
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-bin.zip
 distributionPath=wrapper/dists
 zipStorePath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME