Update the sample app to add example for highlighting current line

Author: AmrDeveloper

app/src/main/java/com/amrdeveloper/codeviewlibrary/MainActivity.java

@@ -67,6 +67,10 @@ private void configCodeView() {
         codeView.setLineNumberTextColor(Color.GRAY);
         codeView.setLineNumberTextSize(25f);
 
+        // Setup highlighting current line
+        codeView.setEnableHighlightCurrentLine(true);
+        codeView.setHighlightCurrentLineColor(Color.GRAY);
+
         // Setup Auto indenting feature
         codeView.setTabLength(4);
         codeView.setEnableAutoIndentation(true);