I want to store image in SQLite DataBase.
I tried to store it using BLOB and String, in both cases it store the
image and can retrieve it but when i convert it to Bitmap using
BitmapFactory.decodeByteArray(...) it return null.
I have used this code, but it returns null
Bitmap bitmap = BitmapFactory.decodeByteArray(blob, 0, blob.length);
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
Kotlin version of Uttam's answer which I used for my app.
The uri can be obtained, for example, using registerForActivityResult
(see OnActivityResult method is deprecated, what is the alternative? answer of Muntashir Akon)
var uri: Uri? = null
var bitmap: Bitmap? = null
// enter the code to get the uri
try {
val source = ImageDecoder.createSource(
context.contentResolver,
uri!!
)
bitmap = ImageDecoder.decodeBitmap(source) { decoder, _, _ ->
decoder.setTargetSampleSize(1) // shrinking by
decoder.isMutableRequired = true // this resolve the hardware type of bitmap problem
}
} catch (e: Exception) {
e.printStackTrace()
}
