位图无法加载2MB的图像

Question

This is the code I'm using:

BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
Bitmap imatgeOriginal = BitmapFactory.decodeFile(imageUrl, options);
Bitmap resizedbitmap = Bitmap.createScaledBitmap(imatgeOriginal, 1000, 1000, true);

As you can see I resize the image with the Options, but anyways it just crashes on the last line, throwing a NullPointerException. So imatgeOriginal is null

Why is this happening?

Some notes:

• The image is 2 MB (less than the 16 MB limit) and the size is 1105 × 1491
• The image does exist
• The same code works with images smaller than 1.5 MB

Output in logcat:

08-22 15:11:13.249: E/AndroidRuntime(5404): FATAL EXCEPTION: main
08-22 15:11:13.249: E/AndroidRuntime(5404):
java.lang.NullPointerException 08-22 15:11:13.249:
E/AndroidRuntime(5404):     at
android.graphics.Bitmap.createScaledBitmap(Bitmap.java:432) 08-22
15:11:13.249: E/AndroidRuntime(5404):   at
myclass.onAnimationEnd(productView.java:2126) 08-22 15:11:13.249:
E/AndroidRuntime(5404):     at
android.view.animation.AnimationSet.getTransformation(AnimationSet.java:397)

Edit:

Something weird is happening, the File Image exists, the route is correct. However android detects this image as CORRUPT or atleast it can't be opened with any tool available (Default gallery, file explorer, no my app). However, if I download the image to my computer, the image is displayed perfectly. This app is also run in iOS and the same image is actually visible there and looking not corrupt.

So I guess there's some limitations in Android to load JPEG files.

Did you guys have any problem similar like this?

Some resources I've found: http://code.google.com/p/skia/issues/detail?id=69#c2 Unable to load JPEG-image with BitmapFactory.decodeFile. Returns null

Answer 1

You can compress your bitmap size Bitmap.compress()

and try this method it'll reduce the size which will maybe help you loading it, because 2MB is huge for some phones

int MAX_IMAGE_SIZE = 200 * 1024; // max final file size
Bitmap bmpPic = BitmapFactory.decodeFile(fileUri.getPath());
if ((bmpPic.getWidth() >= 1024) && (bmpPic.getHeight() >= 1024)) {
    BitmapFactory.Options bmpOptions = new BitmapFactory.Options();
    bmpOptions.inSampleSize = 1;
    while ((bmpPic.getWidth() >= 1024) && (bmpPic.getHeight() >= 1024)) {
        bmpOptions.inSampleSize++;
        bmpPic = BitmapFactory.decodeFile(fileUri.getPath(), bmpOptions);
    }
    Log.d(TAG, "Resize: " + bmpOptions.inSampleSize);
}
int compressQuality = 104; // quality decreasing by 5 every loop. (start from 99)
int streamLength = MAX_IMAGE_SIZE;
while (streamLength >= MAX_IMAGE_SIZE) {
    ByteArrayOutputStream bmpStream = new ByteArrayOutputStream();
    compressQuality -= 5;
    Log.d(TAG, "Quality: " + compressQuality);
    bmpPic.compress(Bitmap.CompressFormat.JPEG, compressQuality, bmpStream);
    byte[] bmpPicByteArray = bmpStream.toByteArray();
    streamLength = bmpPicByteArray.length;
    Log.d(TAG, "Size: " + streamLength);
}
try {
    FileOutputStream bmpFile = new FileOutputStream(finalPath);
    bmpPic.compress(Bitmap.CompressFormat.JPEG, compressQuality, bmpFile);
    bmpFile.flush();
    bmpFile.close();
} catch (Exception e) {
    Log.e(TAG, "Error on saving file");
}

Answer 2

Well I found out what is happening.

There's an issue with Android and JPEG & CMYK pictures.

You can read more: http://code.google.com/p/skia/issues/detail?id=69#c2

Unable to load JPEG-image with BitmapFactory.decodeFile. Returns null

This error is known since 2.0 and there's no workaround at the moment. All you can do is being sure that you won't download any image that have the two properties mentioned above.