user516883 user516883 - 4 months ago 17x
Android Question

Android Saving created bitmap to directory on sd card

I created a bitmap and now i want to save that bitmap to a directory somewhere. Can anyone show me how this is done. Thanks

FileInputStream in;
BufferedInputStream buf;
try {
in = new FileInputStream("/mnt/sdcard/dcim/Camera/2010-11-16_18-57-18_989.jpg");
buf = new BufferedInputStream(in);
Bitmap _bitmapPreScale = BitmapFactory.decodeStream(buf);
int oldWidth = _bitmapPreScale.getWidth();
int oldHeight = _bitmapPreScale.getHeight();
int newWidth = 2592;
int newHeight = 1936;

float scaleWidth = ((float) newWidth) / oldWidth;
float scaleHeight = ((float) newHeight) / oldHeight;

Matrix matrix = new Matrix();
// resize the bit map
matrix.postScale(scaleWidth, scaleHeight);
Bitmap _bitmapScaled = Bitmap.createBitmap(_bitmapPreScale, 0, 0, oldWidth, oldHeight, matrix, true);

(I want to save _bitmapScaled to a folder on my SD card)


Hi You can write data to bytes and then create a file in sdcard folder with whatever name and extension you want and then write the bytes to that file. This will save bitmap to sdcard.

ByteArrayOutputStream bytes = new ByteArrayOutputStream();
_bitmapScaled.compress(Bitmap.CompressFormat.JPEG, 40, bytes);

//you can create a new file name "test.jpg" in sdcard folder.
File f = new File(Environment.getExternalStorageDirectory()
                        + File.separator + "test.jpg");
//write the bytes in file
FileOutputStream fo = new FileOutputStream(f);

// remember close de FileOutput