Pick image from sd card, resize the image and save it back to sd card
Try using this method:
public static Bitmap scaleBitmap(Bitmap bitmapToScale, float newWidth, float newHeight) {
if(bitmapToScale == null)
return null;
//get the original width and height
int width = bitmapToScale.getWidth();
int height = bitmapToScale.getHeight();
// create a matrix for the manipulation
Matrix matrix = new Matrix();
// resize the bit map
matrix.postScale(newWidth / width, newHeight / height);
// recreate the new Bitmap and set it back
return Bitmap.createBitmap(bitmapToScale, 0, 0, bitmapToScale.getWidth(), bitmapToScale.getHeight(), matrix, true);
}
Solution without OutOfMemoryException
in Kotlin
fun resizeImage(file: File, scaleTo: Int = 1024) {
val bmOptions = BitmapFactory.Options()
bmOptions.inJustDecodeBounds = true
BitmapFactory.decodeFile(file.absolutePath, bmOptions)
val photoW = bmOptions.outWidth
val photoH = bmOptions.outHeight
// Determine how much to scale down the image
val scaleFactor = Math.min(photoW / scaleTo, photoH / scaleTo)
bmOptions.inJustDecodeBounds = false
bmOptions.inSampleSize = scaleFactor
val resized = BitmapFactory.decodeFile(file.absolutePath, bmOptions) ?: return
file.outputStream().use {
resized.compress(Bitmap.CompressFormat.JPEG, 75, it)
resized.recycle()
}
}
Just yesterday i have done this
File dir=Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
Bitmap b= BitmapFactory.decodeFile(PATH_ORIGINAL_IMAGE);
Bitmap out = Bitmap.createScaledBitmap(b, 320, 480, false);
File file = new File(dir, "resize.png");
FileOutputStream fOut;
try {
fOut = new FileOutputStream(file);
out.compress(Bitmap.CompressFormat.PNG, 100, fOut);
fOut.flush();
fOut.close();
b.recycle();
out.recycle();
} catch (Exception e) {}
Also don't forget to recycle your bitmaps
: It will save memory.
You can also get path of new created file String: newPath=file.getAbsolutePath();
You can use Bitmap.createScaledBitmap (Bitmap src, int dstWidth, int dstHeight, boolean filter)