client egl context and viewport in kotlin UI

src/main/java/com/omixlab/mosis/MainActivity.kt

@@ -6,7 +6,11 @@ import android.content.ServiceConnection
 import android.os.Bundle
 import android.os.IBinder
 import android.util.Log
+import android.view.Surface
+import android.view.SurfaceView
+import android.view.SurfaceHolder
 import androidx.activity.ComponentActivity
+import androidx.activity.addCallback
 import androidx.activity.enableEdgeToEdge
 import androidx.activity.compose.setContent
 import androidx.compose.foundation.layout.Arrangement
@@ -16,7 +20,9 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.Button
 import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
 import androidx.compose.runtime.mutableStateOf
+import androidx.compose.ui.viewinterop.AndroidView
 
 class MainActivity : ComponentActivity() {
     init {
@@ -25,7 +31,7 @@ class MainActivity : ComponentActivity() {
     var remote_service: IMosisService? = null
     var statusText = mutableStateOf("Status: idle")
     var buttonText = mutableStateOf("Init OS")
-    private val connection = object : ServiceConnection {
+    val connection = object : ServiceConnection {
         override fun onServiceConnected(className: ComponentName, service: IBinder) {
             Log.d("MosisTest", "Service Connected")
             statusText.value = "Service Connected"
@@ -39,6 +45,27 @@ class MainActivity : ComponentActivity() {
             statusText.value = "Service Disconnected"
         }
     }
+    val viewport = object : SurfaceHolder.Callback {
+        override fun surfaceCreated(holder: SurfaceHolder) {
+            Log.d("MosisTest", "surfaceCreated")
+            setSurface(holder.surface)
+        }
+        override fun surfaceChanged(
+            holder: SurfaceHolder,
+            format: Int,
+            width: Int,
+            height: Int
+        ) {
+            // Optional: Pass resize events to native if needed
+            // resizeSurface(width, height)
+            Log.d("MosisTest", "surfaceResized")
+
+        }
+        override fun surfaceDestroyed(holder: SurfaceHolder) {
+            destroySurface()
+            Log.d("MosisTest", "surfaceDestroyed")
+        }
+    }
     fun initOS()
     {
         remote_service?.let { service ->
@@ -47,7 +74,7 @@ class MainActivity : ComponentActivity() {
             buttonText.value = if (result) "OS Initialized" else "OS Not Initialized"
         }
     }
-    private fun startRemoteService() {
+    fun startRemoteService() {
         val intent = Intent("com.omixlab.mosis.SERVICE")
         intent.setPackage("com.omixlab.mosis")
         try {
@@ -73,8 +100,24 @@ class MainActivity : ComponentActivity() {
                     Text(buttonText.value)
                 }
                 Text(statusText.value)
+                NativeViewport(
+                    modifier = Modifier.fillMaxSize(0.8f)
+                )
             }
         }
     }
+    @Composable
+    fun NativeViewport(modifier: Modifier = Modifier) {
+        AndroidView(
+            modifier = modifier,
+            factory = { context ->
+                SurfaceView(context).apply {
+                    holder.addCallback(viewport)
+                }
+            }
+        )
+    }
     external fun serviceConnected(binder: IBinder)
+    external fun setSurface(surface: Surface)
+    external fun destroySurface()
 }