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Accepted
Ibrahim Hernández Jorge
Asked: 2020-04-22 06:33:37 +0800 CST 2020-04-22 06:33:37 +0800 CST

Substitute for Files.readAllBytes and .toPath() for Android

  • 772

I have the following lines in my app in a class that acts as if AsyncTaskto include an image in the body of a query HTTP.

I have the following object File:

val file = File(getContext().cacheDir, "fileName")
file.createNewFile()

and then with a FileOutputStreamI write a BitMapin that file in such a way:

val fos = FileOutputStream(file)
fos.write(bitMapData)
fos.flush()
fos.close()

And finally, to write all the bytes in requestthe query, I use:

val bytes = Files.readAllBytes(file.toPath())
request.write(bytes) //La variable request es el OutputStream del objeto HttpUrlConnection

These two functions, readAllBytes()and toPath()they ask me for a minimum API of 26, which is very high, what would be their substitute for smaller APIs.

android

1 Answers

  1. Best Answer

    As you well comment Files.readAllBytes() was added from API 26.

    You can configure your project with:

    compileSdkVersion=26YtargetSdkVersion=26

    If you want code for older APIs :

    File file = new File("<ruta de archivo>");

     byte[] b = new byte[(int) file.length()];
     try {
           FileInputStream fileInputStream = new FileInputStream(file);
           fileInputStream.read(b);
           for (int i = 0; i < b.length; i++) {
                       System.out.print((char)b[i]);
            }
      } catch (FileNotFoundException e) {
                  System.out.println("No existe archivo en ruta especificada.");
                  e.printStackTrace();
      }
      catch (IOException ioe) {
               System.out.println("Error Reading The File.");
                ioe.printStackTrace();
      }
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