/**
* Save the tag data into the JPEG file. This is expensive because it involves copying all the JPG
* data from one file to another and deleting the old file and renaming the other. It's best to
* use {@link #setAttribute(String,String)} to set all attributes to write and make a single call
* rather than multiple calls for each attribute.
*/
public void saveAttributes() throws IOException {
// format of string passed to native C code:
// "attrCnt attr1=valueLen value1attr2=value2Len value2..."
// example:
// "4 attrPtr ImageLength=4 1024Model=6 FooImageWidth=4 1280Make=3 FOO"
StringBuilder sb = new StringBuilder();
int size = mAttributes.size();
if (mAttributes.containsKey("hasThumbnail")) {
--size;
}
sb.append(size + " ");
for (Map.Entry<String, String> iter : mAttributes.entrySet()) {
String key = iter.getKey();
if (key.equals("hasThumbnail")) {
// this is a fake attribute not saved as an exif tag
continue;
}
String val = iter.getValue();
sb.append(key + "=");
sb.append(val.length() + " ");
sb.append(val);
}
String s = sb.toString();
synchronized (sLock) {
saveAttributesNative(mFilename, s);
commitChangesNative(mFilename);
}
}
