Can someone help me to solve a problem in Android Studio? I am creating an app in which I have a photo in JPEG format(Comming from the camera, not from file) and I want to convert it to bitmap.
You can use this method to convert image to byte[]. Like this:
public byte[] getBytesFromBitmap(Bitmap bitmap) {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.JPEG, 100, stream);
return stream.toByteArray();
}
// Here image variable is a JPEG file/image.
ByteBuffer buffer = image.getPlanes()[0].getBuffer();
byte[] bytes = new byte[buffer.remaining()];
buffer.get(bytes);
Related
How to compress bitmap to jpeg? Storing in a file system is unacceptable.
Just use below code!
Bitmap bmp = null;
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte[] byteArray = stream.toByteArray();
I am aware of the code below
Bitmap photo = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
but the issue is that this code reduces the image quality so much that it is unrecognizable how can i avoid
photo.compress(Bitmap.CompressFormat.PNG,100, stream);
You can use CompressFormat.PNG, where the compress quality doesn't matter, its always lossless as described in the documentation
array = new byte[w*h*4];
Buffer dst = ByteBuffer.wrap(array);
bmp.copyPixelsToBuffer(dst);
In my android application i want to convert image into byte array and encode into string so that i can save it on database. But after compressing image it's size becomes too small..i want to keep original size.. please help me..
final Bitmap image=(images.get(position));
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.PNG, 100, bytes);
byte[] b = bytes.toByteArray();
encodedImageString = Base64.encodeToString(b, Base64.DEFAULT);
You can use the following to store it in the database without compression:
Bitmap bitmap; // obtain bitmap object
int size = bitmap.getRowBytes() * bitmap.getHeight();
ByteBuffer b = ByteBuffer.allocate(size);
bitmap.copyPixelsToBuffer(b);
byte[] bytes = new byte[size];
b.get(bytes, 0, bytes.length);
Then you can store bytes in the database.
I'm using the Parse SDK to build my app.
I can easily get a Bitmap out of the gallery by using Intents. I want to use them as a profile picture for my users.
However, in order to upload it I must convert it into a byte array. Also, when I download it it comes in the form of a byte array, and I must convert it back to a Drawable.
In order to convert it into a byte array, I'm doing this:
public static byte[] bitmapToByteArray(Bitmap bmp)
{
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
return byteArray;
}
I cannot find how to convert this byte[] back into a Bitmap without having to save it first. How can this process be achieved?
Just do the following:
Bitmap bmp = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
I would like to get a byte array from an jpeg image located in my res/drawable file ?
Does anyone know how to do that please ?
Drawable drawable;
Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte[] bitmapdata = stream.toByteArray();
Get a bitmap decodeResource(android.content.res.Resources, int)
Then either compress it to ByteArrayOutputStream() or copyPixelsToBuffer and get your array from the buffer.
http://developer.android.com/reference/android/graphics/Bitmap.html
ByteArrayOutputStream stream = new ByteArrayOutputStream();
mPhoto.compress(Bitmap.CompressFormat.JPEG /* FileType */,
100 /* Ratio */, stream);
HTH !