linux android use cpal (#9914)

Signed-off-by: 21pages <sunboeasy@gmail.com>

flutter/android/app/src/main/kotlin/com/carriez/flutter_hbb/MainActivity.kt

@@ -30,6 +30,10 @@ import com.hjq.permissions.XXPermissions
 import io.flutter.embedding.android.FlutterActivity
 import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.plugin.common.MethodChannel
+import io.flutter.embedding.engine.plugins.FlutterPlugin
+import io.flutter.plugin.common.MethodCall
+import io.flutter.plugin.common.MethodChannel.MethodCallHandler
+import io.flutter.plugin.common.MethodChannel.Result
 import kotlin.concurrent.thread
 
 
@@ -57,6 +61,7 @@ class MainActivity : FlutterActivity() {
             channelTag
         )
         initFlutterChannel(flutterMethodChannel!!)
+        flutterEngine.plugins.add(ContextPlugin())
         thread { setCodecInfo() }
     }
 
@@ -389,3 +394,16 @@ class MainActivity : FlutterActivity() {
         stopService(Intent(this, FloatingWindowService::class.java))
     }
 }
+
+// https://cjycode.com/flutter_rust_bridge/guides/how-to/ndk-init
+class ContextPlugin : FlutterPlugin, MethodCallHandler {
+    override fun onAttachedToEngine(flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
+        FFI.initContext(flutterPluginBinding.applicationContext)
+    }
+    override fun onMethodCall(call: MethodCall, result: Result) {
+        result.notImplemented()
+    }
+
+    override fun onDetachedFromEngine(binding: FlutterPlugin.FlutterPluginBinding) {
+    }
+}

flutter/android/app/src/main/kotlin/ffi.kt

@@ -11,6 +11,7 @@ object FFI {
     }
 
     external fun init(ctx: Context)
+    external fun initContext(ctx: Context)
     external fun startServer(app_dir: String, custom_client_config: String)
     external fun startService()
     external fun onVideoFrameUpdate(buf: ByteBuffer)