Getting bytes[] from inputstream in android gives null value

Question

Trying to get bytes data from inputstream as shown in the below code. But, the bytes variable is null. What might be the reason? FYI- Image is available in the given uri, as i can see the image in imageView1. (Testing on Lollipop).

final InputStream imageStream = getContentResolver().openInputStream(imageUri);
var_Bitmap = BitmapFactory.decodeStream(imageStream);
ImageView imageView1 = (ImageView) findViewById(R.id.ui_imageView_browse);
imageView1.setImageBitmap(var_Bitmap);
byte[] bytes = IOUtils.toByteArray(imageStream);
OutputStream out;
String root = Environment.getExternalStorageDirectory().getAbsolutePath()+"/";
File createDir = new File(root+"master"+File.separator);
createDir.mkdir();


File file = new File(root + "master" + File.separator +"master.jpg");
path=root+"master"+File.separator+"master.jpg";
file.createNewFile();
out = new FileOutputStream(file);
out.write(bytes);
out.close();

the input stream has been read to the EOF by `decodeStream` so there is nothing to read, why do you want to make a copy of your image anyway? — pskink, Aug 10 '17 at 08:39

score 1 · Accepted Answer · edited Aug 10 '17 at 11:15

1

As pskink suggested in a comment, the issue was that the input stream has been read to the EOF by decodeStream, so there is nothing more to read.

To solve the problem, I created a temporary variable for inputstream.

edited Aug 10 '17 at 11:15

Cody Gray - on strike

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answered Aug 10 '17 at 08:48

djac

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score 0 · Answer 2 · answered Aug 10 '17 at 08:56

Try this :

 public byte[] getBytes(InputStream inputStream) throws IOException {
        ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
        int bufferSize = 1024;
        byte[] buffer = new byte[bufferSize];

        int len = 0;
        while ((len = inputStream.read(buffer)) != -1) {
            byteBuffer.write(buffer, 0, len);
        }
        return byteBuffer.toByteArray();
    }

Hope it helps.

Getting bytes[] from inputstream in android gives null value

2 Answers2