diff --git a/app/build.gradle b/app/build.gradle
index 2911aac..3862f4e 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -41,11 +41,14 @@ dependencies {
     implementation "androidx.activity:activity-ktx:$rootProject.activityVersion"
     implementation 'com.google.code.gson:gson:2.8.8'
 
-    // Room
+    // Room (SQLite)
     def roomVersion = "2.3.0"
     implementation "androidx.room:room-ktx:$roomVersion"
     kapt "androidx.room:room-compiler:$roomVersion"
 
+    // Volley (HTTP library)
+    implementation 'com.android.volley:volley:1.2.1'
+
     // Firebase, sigh ...
     implementation 'com.google.firebase:firebase-messaging:22.0.0'
 
diff --git a/app/src/main/java/io/heckel/ntfy/data/Util.kt b/app/src/main/java/io/heckel/ntfy/data/Util.kt
index e4394b7..fca51f7 100644
--- a/app/src/main/java/io/heckel/ntfy/data/Util.kt
+++ b/app/src/main/java/io/heckel/ntfy/data/Util.kt
@@ -1,6 +1,7 @@
 package io.heckel.ntfy.data
 
+fun topicUrl(baseUrl: String, topic: String) = "${baseUrl}/${topic}"
 fun topicShortUrl(baseUrl: String, topic: String) =
-    "${baseUrl}/${topic}"
+    topicUrl(baseUrl, topic)
         .replace("http://", "")
         .replace("https://", "")
diff --git a/app/src/main/java/io/heckel/ntfy/ui/DetailActivity.kt b/app/src/main/java/io/heckel/ntfy/ui/DetailActivity.kt
index c25adca..a385613 100644
--- a/app/src/main/java/io/heckel/ntfy/ui/DetailActivity.kt
+++ b/app/src/main/java/io/heckel/ntfy/ui/DetailActivity.kt
@@ -3,22 +3,36 @@ package io.heckel.ntfy.ui
 import android.app.AlertDialog
 import android.content.Intent
 import android.os.Bundle
+import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
+import android.widget.Toast
 import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
+import com.android.volley.Request
+import com.android.volley.toolbox.StringRequest
+import com.android.volley.toolbox.Volley
 import io.heckel.ntfy.R
 import io.heckel.ntfy.app.Application
 import io.heckel.ntfy.data.Notification
 import io.heckel.ntfy.data.topicShortUrl
+import io.heckel.ntfy.data.topicUrl
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import java.io.OutputStreamWriter
+import java.net.HttpURLConnection
+import java.util.*
+
 
 class DetailActivity : AppCompatActivity() {
     private val viewModel by viewModels<DetailViewModel> {
         DetailViewModelFactory((application as Application).repository)
     }
     private var subscriptionId: Long = 0L // Set in onCreate()
+    private var subscriptionBaseUrl: String = "" // Set in onCreate()
     private var subscriptionTopic: String = "" // Set in onCreate()
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -28,6 +42,7 @@ class DetailActivity : AppCompatActivity() {
 
         // Get extras required for the return to the main activity
         subscriptionId = intent.getLongExtra(MainActivity.EXTRA_SUBSCRIPTION_ID, 0)
+        subscriptionBaseUrl = intent.getStringExtra(MainActivity.EXTRA_SUBSCRIPTION_BASE_URL) ?: return
         subscriptionTopic = intent.getStringExtra(MainActivity.EXTRA_SUBSCRIPTION_TOPIC) ?: return
 
         // Set title
@@ -61,6 +76,10 @@ class DetailActivity : AppCompatActivity() {
 
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         return when (item.itemId) {
+            R.id.detail_menu_test -> {
+                onTestClick()
+                true
+            }
             R.id.detail_menu_delete -> {
                 onDeleteClick()
                 true
@@ -69,7 +88,31 @@ class DetailActivity : AppCompatActivity() {
         }
     }
 
+    private fun onTestClick() {
+        val url = topicUrl(subscriptionBaseUrl, subscriptionTopic)
+        Log.d(TAG, "Sending test notification to $url")
+
+        val queue = Volley.newRequestQueue(this) // This should be a Singleton :-O
+        val stringRequest = object : StringRequest(
+            Method.PUT,
+            url,
+            { _ -> /* Do nothing */ },
+            { error ->
+                Toast
+                    .makeText(this, getString(R.string.detail_test_message_error, error.message), Toast.LENGTH_LONG)
+                    .show()
+            }
+        ) {
+            override fun getBody(): ByteArray {
+                return getString(R.string.detail_test_message, Date().toString()).toByteArray()
+            }
+        }
+        queue.add(stringRequest)
+    }
+
     private fun onDeleteClick() {
+        Log.d(TAG, "Deleting subscription ${topicShortUrl(subscriptionBaseUrl, subscriptionTopic)}")
+
         val builder = AlertDialog.Builder(this)
         builder
             .setMessage(R.string.detail_delete_dialog_message)
@@ -90,6 +133,10 @@ class DetailActivity : AppCompatActivity() {
     }
 
     private fun onNotificationClick(notification: Notification) {
-        println("clicked " + notification.id)
+        // TODO Do something
+    }
+
+    companion object {
+        const val TAG = "NtfyDetailActivity"
     }
 }
diff --git a/app/src/main/java/io/heckel/ntfy/ui/MainActivity.kt b/app/src/main/java/io/heckel/ntfy/ui/MainActivity.kt
index 5772fe8..9dfb94a 100644
--- a/app/src/main/java/io/heckel/ntfy/ui/MainActivity.kt
+++ b/app/src/main/java/io/heckel/ntfy/ui/MainActivity.kt
@@ -3,20 +3,18 @@ package io.heckel.ntfy.ui
 import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
+import android.util.Log
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
 import androidx.activity.viewModels
 import androidx.appcompat.app.AppCompatActivity
-import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
 import com.google.firebase.messaging.FirebaseMessaging
 import io.heckel.ntfy.R
 import io.heckel.ntfy.app.Application
 import io.heckel.ntfy.data.Subscription
 import io.heckel.ntfy.data.topicShortUrl
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
 import java.util.*
 import kotlin.random.Random
 
@@ -29,6 +27,8 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.main_activity)
 
+        // TODO implement multi-select delete - https://enoent.fr/posts/recyclerview-basics/
+
         // Action bar
         title = getString(R.string.main_action_bar_title)
 
@@ -65,11 +65,11 @@ class MainActivity : AppCompatActivity() {
 
     override fun onOptionsItemSelected(item: MenuItem): Boolean {
         return when (item.itemId) {
-            R.id.menu_action_source -> {
+            R.id.main_menu_source -> {
                 startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.main_menu_source_url))))
                 true
             }
-            R.id.detail_menu_delete -> {
+            R.id.main_menu_website -> {
                 startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.app_base_url))))
                 true
             }
@@ -83,12 +83,16 @@ class MainActivity : AppCompatActivity() {
     }
 
     private fun onSubscribe(topic: String, baseUrl: String) {
+        Log.d(TAG, "Adding subscription ${topicShortUrl(baseUrl, topic)}")
+
         val subscription = Subscription(id = Random.nextLong(), baseUrl = baseUrl, topic = topic, notifications = 0, lastActive = Date().time/1000)
         viewModel.add(subscription)
         FirebaseMessaging.getInstance().subscribeToTopic(topic) // FIXME ignores baseUrl
     }
 
     private fun onSubscriptionItemClick(subscription: Subscription) {
+        Log.d(TAG, "Entering detail view for subscription $subscription")
+
         val intent = Intent(this, DetailActivity::class.java)
         intent.putExtra(EXTRA_SUBSCRIPTION_ID, subscription.id)
         intent.putExtra(EXTRA_SUBSCRIPTION_BASE_URL, subscription.baseUrl)
@@ -100,6 +104,8 @@ class MainActivity : AppCompatActivity() {
         if (requestCode == REQUEST_CODE_DELETE_SUBSCRIPTION && resultCode == RESULT_OK) {
             val subscriptionId = data?.getLongExtra(EXTRA_SUBSCRIPTION_ID, 0)
             val subscriptionTopic = data?.getStringExtra(EXTRA_SUBSCRIPTION_TOPIC)
+            Log.d(TAG, "Deleting subscription with subscription ID $subscriptionId (topic: $subscriptionTopic)")
+
             subscriptionId?.let { id -> viewModel.remove(id) }
             subscriptionTopic?.let { topic -> FirebaseMessaging.getInstance().unsubscribeFromTopic(topic) } // FIXME This only works for ntfy.sh
         } else {
diff --git a/app/src/main/res/menu/detail_action_bar_menu.xml b/app/src/main/res/menu/detail_action_bar_menu.xml
index 9b62583..ead0031 100644
--- a/app/src/main/res/menu/detail_action_bar_menu.xml
+++ b/app/src/main/res/menu/detail_action_bar_menu.xml
@@ -1,3 +1,4 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android" >
-    <item android:title="@string/detail_menu_delete" android:id="@+id/detail_menu_delete"/>
+    <item android:id="@+id/detail_menu_test" android:title="@string/detail_menu_test"/>
+    <item android:id="@+id/detail_menu_delete" android:title="@string/detail_menu_delete"/>
 </menu>
diff --git a/app/src/main/res/menu/main_action_bar_menu.xml b/app/src/main/res/menu/main_action_bar_menu.xml
index 4a5c360..a6e655f 100644
--- a/app/src/main/res/menu/main_action_bar_menu.xml
+++ b/app/src/main/res/menu/main_action_bar_menu.xml
@@ -1,5 +1,4 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android" >
-    <item android:id="@+id/menu_action_source"
-          android:title="@string/main_menu_source_title"/>
-    <item android:title="@string/main_menu_website_title" android:id="@+id/detail_menu_delete"/>
+    <item android:id="@+id/main_menu_source" android:title="@string/main_menu_source_title"/>
+    <item android:id="@+id/main_menu_website" android:title="@string/main_menu_website_title"/>
 </menu>
diff --git a/app/src/main/res/menu/main_item_popup_menu.xml b/app/src/main/res/menu/main_item_popup_menu.xml
deleted file mode 100644
index 313c9b1..0000000
--- a/app/src/main/res/menu/main_item_popup_menu.xml
+++ /dev/null
@@ -1,4 +0,0 @@
-<menu xmlns:android="http://schemas.android.com/apk/res/android" >
-    <item android:id="@+id/main_item_popup_unsubscribe"
-          android:title="@string/main_item_popup_unsubscribe"/>
-</menu>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 43c27ff..99c09f3 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -18,7 +18,6 @@
     <string name="main_item_status_reconnecting">reconnecting …</string>
     <string name="main_item_status_text_one">%1$d notification received</string>
     <string name="main_item_status_text_not_one">%1$d notifications received</string>
-    <string name="main_item_popup_unsubscribe">Unsubscribe</string>
     <string name="main_add_button_description">Add subscription</string>
     <string name="main_no_subscriptions_text">It looks like you don\'t have any subscriptions yet.</string>
 
@@ -34,7 +33,10 @@
     <string name="detail_delete_dialog_message">Do you really want to permanently delete this subscription and all its messages?</string>
     <string name="detail_delete_dialog_permanently_delete">Permanently delete</string>
     <string name="detail_delete_dialog_cancel">Cancel</string>
+    <string name="detail_test_message">This is a test notification from the Ntfy Android app. It was sent at %1$s.</string>
+    <string name="detail_test_message_error">Could not send test message: %1$s</string>
 
     <!-- Detail activity: Action bar -->
+    <string name="detail_menu_test">Send test notification</string>
     <string name="detail_menu_delete">Delete topic</string>
 </resources>