Add communication between WebServer and MainActivity

app/build.gradle

@@ -32,6 +32,7 @@ dependencies {
     implementation 'androidx.core:core-ktx:1.2.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'org.nanohttpd:nanohttpd:2.2.0'
+    implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.0.0'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'

app/src/main/java/io/bartek/MainActivity.kt

@@ -1,21 +1,64 @@
 package io.bartek
 
+import android.content.BroadcastReceiver
+import android.content.Context
 import android.content.Intent
+import android.content.IntentFilter
 import android.os.Build
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
 import android.provider.Settings
 import android.provider.Settings.*
 import android.view.View
+import android.widget.Toast
+import androidx.localbroadcastmanager.content.LocalBroadcastManager
 import io.bartek.service.ForegroundService
 
 class MainActivity : AppCompatActivity() {
+    private val receiver = object : BroadcastReceiver() {
+        override fun onReceive(context: Context?, intent: Intent?) {
+            intent?.let {
+                when(intent.getStringExtra("STATE")) {
+                    "STARTED" -> notifyOnStart()
+                    "STOPPED" -> notifyOnStop()
+                }
+            }
+        }
+    }
 
+    private fun notifyOnStart() {
+        Toast.makeText(
+            this,
+            resources.getString(R.string.server_toast_service_started),
+            Toast.LENGTH_SHORT
+        ).show()
+    }
+
+    private fun notifyOnStop() {
+        Toast.makeText(
+            this,
+            resources.getString(R.string.server_toast_service_stopped),
+            Toast.LENGTH_SHORT
+        ).show()
+    }
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+    }
 
+    override fun onResume() {
+        super.onResume()
+        LocalBroadcastManager
+            .getInstance(this)
+            .registerReceiver(receiver, IntentFilter("io.bartek.web.server.CHANGE_STATE"))
+    }
+
+    override fun onPause() {
+        LocalBroadcastManager
+            .getInstance(this)
+            .unregisterReceiver(receiver)
+        super.onPause()
     }
 
     fun startServer(view: View) = actionOnService(ForegroundService.START)
@@ -36,4 +79,5 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
+
 }

app/src/main/java/io/bartek/web/WebServer.kt

@@ -1,8 +1,10 @@
 package io.bartek.web
 
 import android.content.Context
+import android.content.Intent
 import android.speech.tts.TextToSpeech
 import android.widget.Toast
+import androidx.localbroadcastmanager.content.LocalBroadcastManager
 import fi.iki.elonen.NanoHTTPD
 import fi.iki.elonen.NanoHTTPD.Response.Status.*
 import io.bartek.R
@@ -67,19 +69,19 @@ class TTSServer(port: Int, private val context: Context) : NanoHTTPD(port),
 
     override fun start() {
         super.start()
-        Toast.makeText(
+        LocalBroadcastManager
-            context,
+            .getInstance(context)
-            context.resources.getString(R.string.server_toast_service_started),
+            .sendBroadcast(Intent("io.bartek.web.server.CHANGE_STATE").also {
-            Toast.LENGTH_SHORT
+                it.putExtra("STATE", "STARTED")
-        ).show()
+            })
     }
 
     override fun stop() {
         super.stop()
-        Toast.makeText(
+        LocalBroadcastManager
-            context,
+            .getInstance(context)
-            context.resources.getString(R.string.server_toast_service_stopped),
+            .sendBroadcast(Intent("io.bartek.web.server.CHANGE_STATE").also {
-            Toast.LENGTH_SHORT
+                it.putExtra("STATE", "STOPPED")
-        ).show()
+            })
     }
 }