@SuppressWarnings("static-method")
protected ImmutablePair<BitmapDrawable, Boolean> scaleImage(
final ImmutablePair<Bitmap, Boolean> loadResult) {
final Bitmap bitmap = loadResult.left;
return ImmutablePair.of(
bitmap != null ? ImageUtils.scaleBitmapToFitDisplay(bitmap) : null, loadResult.right);
}
private void loadImagePreview() {
if (imageUri == null) {
return;
}
if (!new File(imageUri.getPath()).exists()) {
Log.i("Image does not exist");
return;
}
final Bitmap bitmap = ImageUtils.readAndScaleImageToFitDisplay(imageUri.getPath());
imagePreview.setImageBitmap(bitmap);
imagePreview.setVisibility(View.VISIBLE);
}
private void selectImageFromCamera() {
// create Intent to take a picture and return control to the calling application
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
imageUri = ImageUtils.getOutputImageFileUri(); // create a file to save the image
if (imageUri == null) {
showFailure();
return;
}
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri); // set the image file name
// start the image capture Intent
startActivityForResult(intent, SELECT_NEW_IMAGE);
}
// Caches are loaded from disk on a computation scheduler to avoid using more threads than cores
// while decoding
// the image. Downloads happen on downloadScheduler, in parallel with image decoding.
private Observable<BitmapDrawable> fetchDrawableUncached(final String url) {
if (StringUtils.isBlank(url) || ImageUtils.containsPattern(url, BLOCKED)) {
return Observable.just(ImageUtils.getTransparent1x1Drawable(resources));
}
// Explicit local file URLs are loaded from the filesystem regardless of their age. The IO part
// is short
// enough to make the whole operation on the computation scheduler.
if (FileUtils.isFileUrl(url)) {
return Observable.defer(
new Func0<Observable<BitmapDrawable>>() {
@Override
public Observable<BitmapDrawable> call() {
final Bitmap bitmap = loadCachedImage(FileUtils.urlToFile(url), true).left;
return bitmap != null
? Observable.just(ImageUtils.scaleBitmapToFitDisplay(bitmap))
: Observable.<BitmapDrawable>empty();
}
})
.subscribeOn(AndroidRxUtils.computationScheduler);
}
final boolean shared = url.contains("/images/icons/icon_");
final String pseudoGeocode = shared ? SHARED : geocode;
return Observable.create(
new OnSubscribe<BitmapDrawable>() {
@Override
public void call(final Subscriber<? super BitmapDrawable> subscriber) {
subscription.add(subscriber);
subscriber.add(
AndroidRxUtils.computationScheduler
.createWorker()
.schedule(
new Action0() {
@Override
public void call() {
final ImmutablePair<BitmapDrawable, Boolean> loaded = loadFromDisk();
final BitmapDrawable bitmap = loaded.left;
if (loaded.right) {
subscriber.onNext(bitmap);
subscriber.onCompleted();
return;
}
if (bitmap != null && !onlySave) {
subscriber.onNext(bitmap);
}
AndroidRxUtils.networkScheduler
.createWorker()
.schedule(
new Action0() {
@Override
public void call() {
downloadAndSave(subscriber);
}
});
}
}));
}
private ImmutablePair<BitmapDrawable, Boolean> loadFromDisk() {
final ImmutablePair<Bitmap, Boolean> loadResult =
loadImageFromStorage(url, pseudoGeocode, shared);
return scaleImage(loadResult);
}
private void downloadAndSave(final Subscriber<? super BitmapDrawable> subscriber) {
final File file = LocalStorage.getStorageFile(pseudoGeocode, url, true, true);
if (url.startsWith("data:image/")) {
if (url.contains(";base64,")) {
ImageUtils.decodeBase64ToFile(StringUtils.substringAfter(url, ";base64,"), file);
} else {
Log.e("HtmlImage.getDrawable: unable to decode non-base64 inline image");
subscriber.onCompleted();
return;
}
} else if (subscriber.isUnsubscribed() || downloadOrRefreshCopy(url, file)) {
// The existing copy was fresh enough or we were unsubscribed earlier.
subscriber.onCompleted();
return;
}
if (onlySave) {
subscriber.onCompleted();
return;
}
AndroidRxUtils.computationScheduler
.createWorker()
.schedule(
new Action0() {
@Override
public void call() {
final ImmutablePair<BitmapDrawable, Boolean> loaded = loadFromDisk();
final BitmapDrawable image = loaded.left;
if (image != null) {
subscriber.onNext(image);
} else {
subscriber.onNext(
returnErrorImage
? new BitmapDrawable(
resources,
BitmapFactory.decodeResource(
resources, R.drawable.image_not_loaded))
: ImageUtils.getTransparent1x1Drawable(resources));
}
subscriber.onCompleted();
}
});
}
});
}
/**
* Scales and writes the scaled image.
*
* @param filePath
* @return the scaled image path, or <tt>null</tt> if the image cannot be decoded
*/
@Nullable
private String writeScaledImage(@NonNull final String filePath) {
scaleChoiceIndex = scaleView.getSelectedItemPosition();
final int maxXY = getResources().getIntArray(R.array.log_image_scale_values)[scaleChoiceIndex];
return ImageUtils.readScaleAndWriteImage(filePath, maxXY);
}
