App/Service: Revise the getIpAddress method

This patch revises the getIpAddress method to return the proper localhost
address corresponding to the emulator or the real target. Moreover, the
platform type variables are eliminated.

Signed-off-by: Wook Song <[email protected]>

ml_inference_offloading/src/main/java/ai/nnstreamer/ml/inference/offloading/MainService.kt

@@ -231,19 +231,28 @@ class MainService : Service() {
         return result
     }
 
-    private fun getIpAddress(): String? {
-        val connectivityManager = applicationContext.getSystemService(CONNECTIVITY_SERVICE) as ConnectivityManager
+    // TODO: Add an ApplicationContext Parameter
+    private fun getIpAddress(): String {
+        val connectivityManager = App.context().getSystemService(CONNECTIVITY_SERVICE) as ConnectivityManager
         val network = connectivityManager.activeNetwork
-        val linkProperties = connectivityManager.getLinkProperties(network)
-        val linkAddresses = linkProperties?.linkAddresses
-        linkAddresses?.forEach {linkAddress ->
-            val inetAddress = linkAddress.address
-            if (inetAddress is Inet4Address && !inetAddress.isLoopbackAddress && inetAddress.isSiteLocalAddress) {
-                return inetAddress.hostAddress
+        var inetAddress = if (isRunningOnEmulator) "10.0.2.2" else "localhost"
+        val linkProperties = connectivityManager.getLinkProperties(network) ?: return inetAddress
+
+        for (linkAddress in linkProperties.linkAddresses) {
+            val address = linkAddress.address ?: continue
+
+            when {
+                address !is Inet4Address -> continue
+                address.isLoopbackAddress -> continue
+                else -> {
+                    inetAddress = address.hostAddress?:continue
+
+                    break
+                }
             }
         }
 
-        return "localhost"
+        return inetAddress
     }
 
     private fun findPort(): Int {