Develop Reference

What does BitmapFactory.Options do?

What does BitmapFactory.Options in android.graphics.BitmapFactory.Options do?
There is no theoretical explanation in the android sdk reference manual about this class, it only contains the explanation about the methods of the class.

Bitmapfactory is mainly used for Scaling
Bitmap lBmp = BitmapFactory.decodeResource(getResources(), R.Drawable.ic_dolphin);
It gets the "dolpin" image and it will reduce the image size, if we dnt use bitmapfactory then it leads to insufficient memory allocations

It's used to pass options to the BitmapFactory - as you might expect :)
For example, you can use it to explicitly scale the Bitmap up or down from the source.

See this example
This method is used to create bitmap of given specific size which is stored in sdcard.
public Bitmap decodeFile(String path,int size) {
try {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, o);
// The new size we want to scale to
final int REQUIRED_SIZE = size;
// Find the correct scale value. It should be the power of 2.
int scale = 1;
while (o.outWidth / scale / 2 >= REQUIRED_SIZE && o.outHeight / scale / 2 >= REQUIRED_SIZE)
scale *= 2;
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
return BitmapFactory.decodeFile(path, o2);
} catch (Throwable e) {
e.printStackTrace();
}
return null;
}

Reduce image file size in Android (image type unknown)

I want to let the user choose how much they want to reduce the image file size by, could be low, medium or high then upload the image to a server That part is easy.
Next part is the actual reduction of file size. I'm getting the image URI, I want to reduce the file image file size, the image type could be png, jpg or something else.
I'm aware of Bitmap.compress(), is this the only way to implement or is there an existing open source library?

Bitmap bitmap;
bitmap = MyBitmapFactory.decodeFile(PATHTOPICT, UPLOAD_REQUIRED_SIZE);
if (bitmap != null) {
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
with the method (found with google):
public static Bitmap decodeFile(String filePath, final int REQUIRED_SIZE) {
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filePath, o);
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp <= REQUIRED_SIZE && height_tmp <= REQUIRED_SIZE)
break;
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
Bitmap bitmap = BitmapFactory.decodeFile(filePath, o2);
return bitmap;
}
if something get NULL, its no image/.
scale by power 2 is recommended!!!

Bitmap compressed with quality=100 bigger file size than original

I am trying to send an image to a server. Before sending it, I am reducing its size and quality, and then fixing any rotation issue. My problem is that, after rotating the image, when I save it, the file is bigger than before. Before rotation size was 10092 and after rotation is 54226
// Scale image to reduce it
Bitmap reducedImage = reduceImage(tempPhotoPath);
// Decrease photo quality
FileOutputStream fos = new FileOutputStream(tempPhotoFile);
reducedImage.compress(CompressFormat.JPEG, 55, fos);
fos.flush();
fos.close();
// Check and fix rotation issues
Bitmap fixed = fixRotation(tempPhotoPath);
if(fixed!=null)
{
FileOutputStream fos2 = new FileOutputStream(tempPhotoFile);
fixed.compress(CompressFormat.JPEG, 100, fos2);
fos2.flush();
fos2.close();
}
public Bitmap reduceImage(String originalPath)
{
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
o.inPurgeable = true;
o.inInputShareable = true;
BitmapFactory.decodeFile(originalPath, o);
// The new size we want to scale to
final int REQUIRED_SIZE = 320;
// Find the correct scale value. It should be the power of 2.
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp / 2 < REQUIRED_SIZE || height_tmp / 2 < REQUIRED_SIZE) {
break;
}
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inPurgeable = true;
o2.inInputShareable = true;
o2.inSampleSize = scale;
Bitmap bitmapScaled = null;
bitmapScaled = BitmapFactory.decodeFile(originalPath, o2);
return bitmapScaled;
}
public Bitmap fixRotation(String path)
{
Bitmap b = null;
try
{
//Find if the picture is rotated
ExifInterface exif = new ExifInterface(path);
int degrees = 0;
if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("6"))
degrees = 90;
else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("8"))
degrees = 270;
else if(exif.getAttribute(ExifInterface.TAG_ORIENTATION).equalsIgnoreCase("3"))
degrees = 180;
if(degrees > 0)
{
BitmapFactory.Options o = new BitmapFactory.Options();
o.inPurgeable = true;
o.inInputShareable = true;
Bitmap bitmap = BitmapFactory.decodeFile(path, o);
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix mtx = new Matrix();
mtx.postRotate(degrees);
b = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
}
}
catch(Exception e){e.printStackTrace();}
return b;
}

You're compressing it with different quality measures. After rotation, you're using quality 100, so it's going to be a larger file than the previous one, with quality 55.
When you compress an image, it doesn't matter what the current file size/quality is. That has no real impact on the outcome. Compressing at 55 quality, followed by 100 quality, does not result in a file with the same size as a simple 55 quality compression. It results in a file with the size of 100 quality compression, because that's the last thing done to it.
For your specific code, I'm not sure I see the reason behind compressing it twice anyway. Compression(file size) isn't what was causing your OOM problems when rotating, the image dimensions were most likely the culprit. Shrinking the image before rotating should fix that, no need for saving a temp file.
All you need to do is run reduceImage(), then follow it up with fixRotation(). Fix your rotation method so that it accepts a Bitmap instead of a path, so you don't need to save the file in between. Finally, save/compress it at whatever quality you desire.
If you do need the temp file for some reason, use PNG for the first compression. This way it's lossless, so when you recompress the final image, you won't have used JPG(lossy) twice at a low quality.

How to reduce memory consumption in android [duplicate]

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Android: Strange out of memory issue while loading an image to a Bitmap object
I am new in android field. I don't known the how to reduce the memory consumption in android. In my application large number of image is drawn from the web and display into grid view. When running the application "out memory problem is occur".
Please help me

1) scale down and reduce the size of images
/**
* decodes image and scales it to reduce memory consumption
*
* #param file
* #param requiredSize
* #return
*/
public static Bitmap decodeFile(File file, int requiredSize) {
try {
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(file), null, o);
// The new size we want to scale to
// Find the correct scale value. It should be the power of 2.
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp / 2 < requiredSize
|| height_tmp / 2 < requiredSize)
break;
width_tmp /= 2;
height_tmp /= 2;
scale *= 2;
}
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
Bitmap bmp = BitmapFactory.decodeStream(new FileInputStream(file),
null, o2);
return bmp;
} catch (FileNotFoundException e) {
} finally {
}
return null;
}
2) use bitmap.Recycle();
3) use System.gc(); for indicating to the VM that it would be a good time to run the garbage collector

Suggestions to avoid bitmap Out of Memory error

I am working on an android application. The application has a view containing lots of image. I had an error, I will try to give as much information as possible hoping someone can give me some suggestions.
The application was working great on all the local testings. However, I received lots of crashes from users: java.lang.OutOfMemoryError: bitmap size exceeds VM budget
This is the stack trace
0 java.lang.OutOfMemoryError: bitmap size exceeds VM budget
1 at android.graphics.Bitmap.nativeCreate(Native Method)
2 at android.graphics.Bitmap.createBitmap(Bitmap.java:507)
3 at android.graphics.Bitmap.createBitmap(Bitmap.java:474)
4 at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:379)
5 at android.graphics.BitmapFactory.finishDecode(BitmapFactory.java:498)
6 at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:473)
7 at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:336)
8 at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:359)
9 at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:385)
My biggest problem is that I was not able to reproduce the issue locally even on old devices.
I have implemented lots of things to try to resolve this:
No memory leaks: I made sure there is no memory leaks at all. I removed the views when I dont need them. I also recycled all the bitmaps and made sure the garbage collector is working as it should. And I implemented all the necessary steps in the onDestroy() method
Image size scaled correctly: Before getting the image I get its dimension and calculate the inSampleSize.
Heap size: I also detect the Max Heap size before getting the image and make sure there is enough space. If there is not enough I rescale the image accordingly.
Code to calculate the correct inSampleSize
public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight)
{
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if(height > reqHeight || width > reqWidth)
{
if(width > height)
{
inSampleSize = Math.round((float) height / (float) reqHeight);
}
else
{
inSampleSize = Math.round((float) width / (float) reqWidth);
}
}
return inSampleSize;
}
Code to get the bitmap
// decodes image and scales it to reduce memory consumption
private static Bitmap decodeFile(File file, int newWidth, int newHeight)
{// target size
try
{
Bitmap bmp = MediaStore.Images.Media.getBitmap(getContext().getContentResolver(), Uri.fromFile(file));
if(bmp == null)
{
// avoid concurrence
// Decode image size
BitmapFactory.Options option = new BitmapFactory.Options();
// option = getBitmapOutput(file);
option.inDensity = res.getDisplayMetrics().densityDpi < DisplayMetrics.DENSITY_HIGH ? 120 : 240;
option.inTargetDensity = res.getDisplayMetrics().densityDpi;
if(newHeight > 0 && newWidth > 0)
option.inSampleSize = calculateInSampleSize(option, newWidth, newWidth);
option.inJustDecodeBounds = false;
byte[] decodeBuffer = new byte[12 * 1024];
option.inTempStorage = decodeBuffer;
option.inPurgeable = true;
option.inInputShareable = true;
option.inScaled = true;
bmp = BitmapFactory.decodeStream(new FileInputStream(file), null, option);
if(bmp == null)
{
return null;
}
}
else
{
int inDensity = res.getDisplayMetrics().densityDpi < DisplayMetrics.DENSITY_HIGH ? 120 : 240;
int inTargetDensity = res.getDisplayMetrics().densityDpi;
if(inDensity != inTargetDensity)
{
int newBmpWidth = (bmp.getWidth() * inTargetDensity) / inDensity;
int newBmpHeight = (bmp.getHeight() * inTargetDensity) / inDensity;
bmp = Bitmap.createScaledBitmap(bmp, newBmpWidth, newBmpHeight, true);
}
}
return bmp;
}
catch(Exception e)
{
Log.e("Error calling Application.decodeFile Method params: " + Arrays.toString(new Object[]{file }), e);
}
return null;
}
Code to calculate image size based on Heap size for older devices
private void calculateImagesSize()
{
// only for android older than HoneyComb that does not support large heap
if(Build.VERSION.SDK_INT < Constants.HONEYCOMB)
{
long maxHeapSize = Runtime.getRuntime().maxMemory();
long maxImageHeap = maxHeapSize - 10485760;
if(Application.getResource().getDisplayMetrics().densityDpi >= DisplayMetrics.DENSITY_XHIGH)
{
maxImageHeap -= 12 * 1048576;
}
if(maxImageHeap < (30 * 1048576))
{
int screenHeight = Math.min(Application.getResource().getDisplayMetrics().heightPixels, Application.getResource()
.getDisplayMetrics().widthPixels);
long maxImageSize = maxImageHeap / 100;
long maxPixels = maxImageSize / 4;
long maxHeight = (long) Math.sqrt(maxPixels / 1.5);
if(maxHeight < screenHeight)
{
drawableHeight = (int) maxHeight;
drawableWidth = (int) (drawableHeight * 1.5);
}
}
}
}
I think the problem is with the Heap, maybe sometimes the os doesn't allow the application to use the maxheapsize. Also my biggest problem is that I was not able to reproduce the issue, so when I try a fix I have to wait a little to see if users are still getting the error.
What more could I try to avoid Out of memory issues? Any suggestions would be greatly appreciated. Thanks a lot

just use this function to decode...this is perfect solution for your error..because i also getting same error and i got this solution..
public static Bitmap decodeFile(File f,int WIDTH,int HIGHT){
try {
//Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f),null,o);
//The new size we want to scale to
final int REQUIRED_WIDTH=WIDTH;
final int REQUIRED_HIGHT=HIGHT;
//Find the correct scale value. It should be the power of 2.
int scale=1;
while(o.outWidth/scale/2>=REQUIRED_WIDTH && o.outHeight/scale/2>=REQUIRED_HIGHT)
scale*=2;
//Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize=scale;
return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
} catch (FileNotFoundException e) {}
return null;
}

Hi you have to decode the file . for this try with the following method.
public static Bitmap new_decode(File f) {
// decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
o.inDither = false; // Disable Dithering mode
o.inPurgeable = true; // Tell to gc that whether it needs free memory,
// the Bitmap can be cleared
o.inInputShareable = true; // Which kind of reference will be used to
// recover the Bitmap data after being
// clear, when it will be used in the future
try {
BitmapFactory.decodeStream(new FileInputStream(f), null, o);
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// Find the correct scale value. It should be the power of 2.
final int REQUIRED_SIZE = 300;
int width_tmp = o.outWidth, height_tmp = o.outHeight;
int scale = 1;
while (true) {
if (width_tmp / 1.5 < REQUIRED_SIZE && height_tmp / 1.5 < REQUIRED_SIZE)
break;
width_tmp /= 1.5;
height_tmp /= 1.5;
scale *= 1.5;
}
// decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
// o2.inSampleSize=scale;
o.inDither = false; // Disable Dithering mode
o.inPurgeable = true; // Tell to gc that whether it needs free memory,
// the Bitmap can be cleared
o.inInputShareable = true; // Which kind of reference will be used to
// recover the Bitmap data after being
// clear, when it will be used in the future
// return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
try {
// return BitmapFactory.decodeStream(new FileInputStream(f), null,
// null);
Bitmap bitmap= BitmapFactory.decodeStream(new FileInputStream(f), null, null);
System.out.println(" IW " + width_tmp);
System.out.println("IHH " + height_tmp);
int iW = width_tmp;
int iH = height_tmp;
return Bitmap.createScaledBitmap(bitmap, iW, iH, true);
} catch (OutOfMemoryError e) {
// TODO: handle exception
e.printStackTrace();
// clearCache();
// System.out.println("bitmap creating success");
System.gc();
return null;
// System.runFinalization();
// Runtime.getRuntime().gc();
// System.gc();
// decodeFile(f);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
}
}

By Reducing/Scale size of the Image you can get rid out of the Out of Memory Exception,
Try this
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 6;
Bitmap receipt = BitmapFactory.decodeFile(photo.toString(),options); //From File You can customise on your needs.

I wrote a summary of suggestions in another StackOverFlow question: Android: BitmapFactory.decodeStream() out of memory with a 400KB file with 2MB free heap

actually the problem is with the development os. In android unlike iOS , google people develop this based on camera resolution. Bitmaps take up a lot of memory, especially for rich images like photographs.Different cameras captures images with different pixels(different mobiles have different camera pixel capacity). Here in android based on that pixels only the captured image will take memory. so obviously a high resolution image will not uploaded by a phone with low pixel capacity.
In android os allocates utmost 16MB to every application. If the uploaded image takes more than this then java.lang.OutofMemoryError: bitmap size exceeds VM budget will occur and application crashes.
refer this
http://developer.android.com/training/displaying-bitmaps/index.html

If u want to avoid OOM, u can catch OOM and increase the sampleSize until the image can be resolved:
private Bitmap getBitmapSafely(Resources res, int id, int sampleSize) {
// res = context.getResources(), id = R.drawable.yourimageid
Bitmap bitmap = null;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPurgeable = true;
options.inSampleSize = sampleSize;
try {
bitmap = BitmapFactory.decodeResource(res,
id, options);
} catch (OutOfMemoryError oom) {
Log.w("ImageView", "OOM with sampleSize " + sampleSize, oom);
System.gc();
bitmap = getBitmapSafely(res, id, sampleSize + 1);
}
return bitmap;
}
Hope it helps.
It is not suitable to catch the Error, just a workaround.