Question

I am trying to move a part of code written in Java (Android) to C# (Mono for android) and I am stuck at finding a way to do this. The part of the code in Java is as follows:

private Bitmap decodeFile(File f){
     try {
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(new FileInputStream(f), null, o);
     ...
     } catch(FileNotFoundException ex){
     }

Precisely, converting from Java.IO.File to System.IO.Stream as required by the first parameter of DecodeStream is my problem. How should this statement be rewritten?

Answer 1

I usually use the static System.File methods to obtain the corresponding FileStream:

var stream = File.OpenRead("PathToFile")

In your case, you should get rid of the “File” class that you have in java: File is a static class in .NET. Can you pass the path directly (as a String) to your decodeFile function?

 private Bitmap decodeFile(string f){
 try {
    var o = new BitmapFactory.Options();
    o.inJustDecodeBounds = true;
    using (var stream = File.OpenRead(f)) {
      BitmapFactory.decodeStream(stream, null, o);
    ...
    }
 } catch(FileNotFoundException ex){
 }