CODEWITHSUNDEEP
androidimage-processingarrays
user1708134
user1708134

Reputation: 673

Image from SD card to byte[]

how can i get the byte[] of an image from android emulator SD card?

here's my current code:

File f = new File("/mnt/sdcard/test.jpg");
ImageView mImgView1 = (ImageView)findViewById(R.id.iv);
Bitmap bmp = BitmapFactory.decodeFile(f.getAbsolutePath());

What i want is the byte format of the image how can i do this?

Upvotes: 1

Views: 1722

Answers (2)

Glenn
Glenn

Reputation: 12809

Create a ByteArrayOutputStream then call compress() method of Bitmap so the contents of bitmap will be passed in ByteArrayOutputStream and converted to byte[]

public byte[] bitmapToByteArray(Bitmap b)
{
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    b.compress(Bitmap.CompressFormat.PNG, 100, stream);
    byte[] byteArray = stream.toByteArray();
    return byteArray;
}

To apply,

Bitmap bmp = BitmapFactory.decodeFile(file.getAbsolutePath());

byte[] bitmapBytes = bitmapToByteArray(bmp);

Upvotes: 4

Sanober Malik
Sanober Malik

Reputation: 2805

You can convert Bitmap to byte[] like :

String imageInSD = Environment.getExternalStorageDirectory().getAbsolutePath() +"/Folder/" + filename + ".PNG";
Bitmap bmp = BitmapFactory.decodeFile(imageInSD);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();

Upvotes: 0

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