use forward slash to parse zip entries first

Author: codeanticode

src/processing/mode/android/AndroidBuild.java

@@ -940,8 +940,6 @@ private File createTempBuildFolder(final Sketch sketch) throws IOException {
   private void installGradlew(File exportFolder) throws IOException {
     File gradlewFile = mode.getContentFile("mode/gradlew.zip");
     AndroidUtil.extractFolder(gradlewFile, exportFolder, true, true); 
-    File execFile = new File(exportFolder, "gradlew");
-    execFile.setExecutable(true);
   }
 
 

src/processing/mode/android/AndroidUtil.java

@@ -194,7 +194,12 @@ static public void extractFolder(File file, File newPath, boolean setExec,
 
       if (remRoot) {
         // Remove root folder from path
-        int idx = currentEntry.indexOf(File.separator); 
+        int idx = currentEntry.indexOf("/");
+        if (idx == -1) {
+          // Let's try the system file separator
+          // https://stackoverflow.com/a/16485210
+          idx = currentEntry.indexOf(File.separator);
+        }
         currentEntry = currentEntry.substring(idx + 1);
       }