Drawable to byte[]
-
09-10-2019 - |
Question
I have an image from the web in an ImageView
. It is very small (a favicon) and I'd like to store it in my SQLite database.
I can get a Drawable
from mImageView.getDrawable()
but then I don't know what to do next. I don't fully understand the Drawable
class in Android.
I know I can get a byte array from a Bitmap
like:
Bitmap defaultIcon = BitmapFactory.decodeStream(in);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
defaultIcon.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte[] bitmapdata = stream.toByteArray();
But how do I get a byte array from a Drawable
?
Solution
Drawable d; // the drawable (Captain Obvious, to the rescue!!!)
Bitmap bitmap = ((BitmapDrawable)d).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte[] bitmapdata = stream.toByteArray();
OTHER TIPS
Thanks all and this solved my problem.
Resources res = getResources();
Drawable drawable = res.getDrawable(R.drawable.my_pic);
Bitmap bitmap = ((BitmapDrawable)drawable).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte[] bitMapData = stream.toByteArray();
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.tester);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte[] bitMapData = stream.toByteArray();
If Drawable is an BitmapDrawable you can try this one.
long getSizeInBytes(Drawable drawable) {
if (drawable == null)
return 0;
Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
return bitmap.getRowBytes() * bitmap.getHeight();
}
Bitmap.getRowBytes() returns the number of bytes between rows in the bitmap's pixels.
For more refer this project: LazyList
File myFile = new File(selectedImagePath);
byte [] mybytearray = new byte [filelenghth];
BufferedInputStream bis1 = new BufferedInputStream(new FileInputStream(myFile));
bis1.read(mybytearray,0,mybytearray.length);
now the image is stored in the bytearray..
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