connector retry reconnect

app/src/main/java/com/denco/assemblrprintingservice/printing/PrinterConnector.java

@@ -63,8 +63,23 @@ public class PrinterConnector implements IPOSListener {
         return (int) (inches * this.PRINTER_DPI);
     }
 
-    public void printBitmap(Bitmap bitmap) {
+    static final int RETRY_COUNT = 5;
 
+    public void printBitmap(Bitmap bitmap) {
+        if (printer == null) {
+            this.reconnect();
+            int iteration = 0;
+            while (true) {
+                if (printer != null) break;
+                if (iteration > RETRY_COUNT) return;
+                try {
+                    Thread.sleep(1000);
+                } catch (InterruptedException e) {
+                    throw new RuntimeException(e);
+                }
+                iteration++;
+            }
+        }
         Dimensions dimensions = this.config.getDimensions();
 
         int widthInDots = mmToDots(dimensions.getWidth());