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Android : How to read file in bytes?

I am trying to get file content in bytes in Android application. I have get the file in SD card now want to get the selected file in bytes. I googled but no such success. Please help

Below is the code to get files with extension. Through this i get files and show in spinner. On file selection I want to get file in bytes.

private List<String> getListOfFiles(String path) {

   File files = new File(path);

   FileFilter filter = new FileFilter() {

      private final List<String> exts = Arrays.asList("jpeg", "jpg", "png", "bmp", "gif","mp3");

      public boolean accept(File pathname) {
         String ext;
         String path = pathname.getPath();
         ext = path.substring(path.lastIndexOf(".") + 1);
         return exts.contains(ext);

   final File [] filesFound = files.listFiles(filter);
   List<String> list = new ArrayList<String>();
   if (filesFound != null && filesFound.length > 0) {
      for (File file : filesFound) {
   return list;



here it’s a simple:

File file = new File(path);
int size = (int) file.length();
byte[] bytes = new byte[size];
try {
    BufferedInputStream buf = new BufferedInputStream(new FileInputStream(file));, 0, bytes.length);
} catch (FileNotFoundException e) {
    // TODO Auto-generated catch block
} catch (IOException e) {
    // TODO Auto-generated catch block

Add permission in manifest.xml:

 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
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