Confirm Android radio activation and support explicit channel selection

tools/chatgui-android/app/src/main/java/com/utun/chat/data/RadioAudioEngine.kt

@@ -179,8 +179,12 @@ class RadioAudioEngine {
 
     /** Начать прослушивание канала (переключатель рации вкл).
      *  Тяжёлая инициализация аудио выполняется на io-потоке, не блокируя main. */
-    fun start(group: Long) {
-        if (active && groupId == group) return
+    fun start(group: Long, onReady: ((Boolean) -> Unit)? = null) {
+        if (active && groupId == group) {
+            val version = generation
+            io.execute { mainHandler.post { onReady?.invoke(active && generation == version && audioTrack != null) } }
+            return
+        }
         mainHandler.removeCallbacks(releaseTalk)
         val version = ++generation
         active = true
@@ -189,7 +193,7 @@ class RadioAudioEngine {
         pttHolds.cancel()
         _talkingFlow.value = false
         io.execute {
-            if (!active || generation != version) return@execute
+            if (!active || generation != version) { mainHandler.post { onReady?.invoke(false) }; return@execute }
             releaseLocked()
             audioGroup = group
             vadWindow.restart(SystemClock.elapsedRealtime())
@@ -201,6 +205,8 @@ class RadioAudioEngine {
                     if (generation == version) active = false
                 }
             }
+            val ready = active && generation == version && audioTrack != null
+            mainHandler.post { onReady?.invoke(ready && active && generation == version) }
         }
     }
 

tools/chatgui-android/app/src/main/java/com/utun/chat/viewmodel/ChatViewModel.kt

@@ -991,9 +991,26 @@ class ChatViewModel : ViewModel() {
 
     fun toggleRadio() {
         val ch = _currentChannel.value ?: return
+        setRadioEnabled(ch, radioChannelId != ch.id)
+    }
+
+    /** Вызов выбирает конкретный канал; повторное принятие не выключает уже работающую рацию. */
+    fun enableRadioForCall(channelId: String, onReady: (Boolean) -> Unit) {
+        val channel = _channels.value.firstOrNull { it.id == channelId }
+        if (channel == null) {
+            LogManager.addLog("ERROR", "radio", "Call activation channel missing id=$channelId")
+            onReady(false); return
+        }
+        selectChannel(channel)
+        if (radioChannelId == channel.id) {
+            radioAudio.start(channel.id.toULong().toLong(), onReady)
+            return
+        }
+        setRadioEnabled(channel, true, onReady)
+    }
+
+    private fun setRadioEnabled(ch: Channel, next: Boolean, onReady: ((Boolean) -> Unit)? = null) {
         val groupId = ch.id.toULongOrNull()?.toLong() ?: return
-        val wasOnHere = radioChannelId == ch.id
-        val next = !wasOnHere
         radioToggleCount++
         val caller = Throwable().stackTrace.drop(1).take(8)
             .joinToString(" <- ") { "${it.className.substringAfterLast('.')}.${it.methodName}:${it.lineNumber}" }
@@ -1008,7 +1025,10 @@ class ChatViewModel : ViewModel() {
             _radioTalkState.value = RadioTalkState(groupId)
             _radioTalking.value = null
             NativeLib.radioSetActive(groupId, true)
-            radioAudio.start(groupId)
+            radioAudio.start(groupId) { ready ->
+                if (!ready && radioChannelId == ch.id && !radioAudio.isActive()) turnRadioOff()
+                onReady?.invoke(ready)
+            }
             radioAudio.router.onChanged = { r, headset ->
                 _radioRoute.value = r
                 _radioHeadsetAvailable.value = headset