shaohui10086

 fun rxJavaExample(folders: List<File>) {
     Observable.from(folders)
        .flatMap((folder) -> { Observable.from(folder.listFiles()) })
        .filter( (file) -> { file.getName().endsWith(".png") })
        .map( (file) -> { getBitmapFromFile(file) })
        .subscribeOn(Schedulers.io())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe((Action1) (bitmap) -> { imageCollectorView.addImage(bitmap) });
 }