Bitmap to jpeg without saving to the file system - android

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();

Related

Can anyone tell me how i can convert any format image directly to string?

private String getBase64String() {
// give your image file url in mCurrentPhotoPath
Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
// In case you want to compress your image, here it's at 40%
// here i use JPEG image but now can anyone tell how can i convert any format image in String
bitmap.compress(Bitmap.CompressFormat.JPEG, 40, byteArrayOutputStream);
byte[] byteArray = byteArrayOutputStream.toByteArray();
return Base64.encodeToString(byteArray, Base64.DEFAULT);
}

You can use the Base64 Android class:
String ecodImage = Base64.encodeToString(byteArrayImage, Base64.DEFAULT);
You'll have to convert your image into a byte array though.Like:
Bitmap btm = BitmapFactory.decodeFile("/path/to/image.jpg");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
btm.compress(Bitmap.CompressFormat.JPEG, 100, baos); //btm is the bitmap object
byte[] b = baos.toByteArray();

How to covert Image to byte[] or bitmap in Android Studio?

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);

meaningless char when image print with android

How can print image with USB Adapter. I have error from attachment.
My code:
Bitmap bmp = getBitmapFromView(view);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
.....
.....
usbDeviceConnection.bulkTransfer(usbEndpoint,byteArray,byteArray.length,10000);
Can you help me?
Thanks.

Bitmap to byteArray without compress

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);

How to get a byte array from a drawable resource ?

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 !

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