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To convert a byte array to an image. Create a ByteArrayInputStream object by passing the byte array (that is to be converted) to its constructor. Read the image using the read() method of the ImageIO class (by passing the ByteArrayInputStream objects to it as a parameter).
In addition, you can simply convert byte array to Bitmap . var bmp = new Bitmap(new MemoryStream(imgByte)); You can also get Bitmap from file Path directly.
Images are binary data - this is easily represented as byte arrays. The image in the sample is stored in the database as a BLOB - not a string or location, that is, it is binary data.
You can convert vector objects and text into bitmaps, and then use bitmap filters to apply effects. The process of converting vector objects into a bitmap is called Rasterization.
Just try this:
Bitmap bitmap = BitmapFactory.decodeFile("/path/images/image.jpg");
ByteArrayOutputStream blob = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.PNG, 0 /* Ignored for PNGs */, blob);
byte[] bitmapdata = blob.toByteArray();
If bitmapdata is the byte array then getting Bitmap is done like this:
Bitmap bitmap = BitmapFactory.decodeByteArray(bitmapdata, 0, bitmapdata.length);
Returns the decoded Bitmap, or null if the image could not be decoded.
The answer of Uttam didnt work for me. I just got null when I do:
Bitmap bitmap = BitmapFactory.decodeByteArray(bitmapdata, 0, bitmapdata.length);
In my case, bitmapdata only has the buffer of the pixels, so it is imposible for the function decodeByteArray to guess which the width, the height and the color bits use. So I tried this and it worked:
//Create bitmap with width, height, and 4 bytes color (RGBA)
Bitmap bmp = Bitmap.createBitmap(imageWidth, imageHeight, Bitmap.Config.ARGB_8888);
ByteBuffer buffer = ByteBuffer.wrap(bitmapdata);
bmp.copyPixelsFromBuffer(buffer);
Check https://developer.android.com/reference/android/graphics/Bitmap.Config.html for different color options
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