android - Read file As String

Question

I need to load an xml file as String in android so I can load it to TBXML xml parser library and parse it. The implementation I have now to read the file as String takes around 2seconds even for a very small xml file of some KBs. Is there any known fast method that can read a file as string in Java/Android?

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This is the code I have now:

public static String readFileAsString(String filePath) {
    String result = "";
    File file = new File(filePath);
    if ( file.exists() ) {
        //byte[] buffer = new byte[(int) new File(filePath).length()];
        FileInputStream fis = null;
        try {
            //f = new BufferedInputStream(new FileInputStream(filePath));
            //f.read(buffer);

            fis = new FileInputStream(file);
            char current;
            while (fis.available() > 0) {
                current = (char) fis.read();
                result = result + String.valueOf(current);
            }
        } catch (Exception e) {
            Log.d("TourGuide", e.toString());
        } finally {
            if (fis != null)
                try {
                    fis.close();
                } catch (IOException ignored) {
            }
        }
        //result = new String(buffer);
    }
    return result;
}

Answer 1

The code finally used is the following from:

http://www.java2s.com/Code/Java/File-Input-Output/ConvertInputStreamtoString.htm

public static String convertStreamToString(InputStream is) throws Exception {
    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    StringBuilder sb = new StringBuilder();
    String line = null;
    while ((line = reader.readLine()) != null) {
      sb.append(line).append("
");
    }
    reader.close();
    return sb.toString();
}

public static String getStringFromFile (String filePath) throws Exception {
    File fl = new File(filePath);
    FileInputStream fin = new FileInputStream(fl);
    String ret = convertStreamToString(fin);
    //Make sure you close all streams.
    fin.close();        
    return ret;
}