android-bitmap

What is the difference between setImageBitmap and setImageDrawable ? I have an image which I would like to set dynamically from file. The tutorial that I followed says to convert my Bitmap to a BitmapDrawable then set it using setImageDrawable . I've notice that setting the Bitmap directly with setImageBitmap also works but I don't notice any difference. Bitmap image = BitmapFactory.decodeFile(imgFile.getAbsolutePath()); BitmapDrawable bitmapDrawable = new BitmapDrawable(image); imageView.setImageDrawable(bitmapDrawable); OR Bitmap image = BitmapFactory.decodeFile(imgFile.getAbsolutePath());

How do I make a background image fit the view but keep its aspect ratio when using <bitmap /> as a background drawable XML? None of <bitmap> 's android:gravity values gives the desired effect. It is impossible to achieve manipulating background attribute within xml-files only. There are two options: You cut/scale the bitmap programmatically with Bitmap.createScaledBitmap(Bitmap src, int dstWidth, int dstHeight, boolean filter) and set it as some View 's background. You use ImageView instead of background placing it as the first layout's element and specify android:scaleType attribute for it:

I am working on a camera feature in my application. I am capturing an image and passing it to another activity. The problem that I'm facing is when I display the image in another activity it loses its original result (gets pixilated) for some reason. This is how I'm doing it: private void takePhotoFromCamera() { if(ActivityCompat.checkSelfPermission(EnterDataView.this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED){ Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); startActivityForResult(cameraIntent, CAMERA_REQUEST); }else { String[]

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 ? Cristian

I am trying to get a FileInputStream object on an image that the user selects from the picture gallery. This is the android URI returned by android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI content://media/external/images/media/3 When I try to construct a java URI object from this object, I get an IllegalArgumentException with the exception description Expected file scheme in URI: content://media/external/images/media/3 whereas the android URI shows the scheme as content Update : Never found a solution for the original question. But if you want the byte stream of an image in the