anzeigen von Bildern speichern in sdcard Ordner in android

Verwenden Universal Image Loader

https://github.com/nostra13/Android-Universal-Image-Loader.git

Geben Sie Bild-url, da Sie Ihre sd-Karte-Bild Weg.

/**
     *adapter class for view pager
     *
     */
    private class ImagePagerAdapter extends PagerAdapter {
        LayoutInflater inflater;
        public ImagePagerAdapter() {
            inflater=getActivity().getLayoutInflater();
        }

        @Override
        public int getCount() {
            return viewPagerList.size();
        }
        @Override
        public void finishUpdate(View container) {
        }
        @Override
        public boolean isViewFromObject(View view, Object object) {
            return view.equals(object);
        }

        @Override
        public Object instantiateItem(ViewGroup container, int position) {
            View imageLayout = inflater.inflate(R.layout.item_pager_image, container, false);
            ImageView imageView = (ImageView) imageLayout.findViewById(R.id.image);
            final ProgressBar spinner = (ProgressBar) imageLayout.findViewById(R.id.loading);
            String loadURL=null;
            if(connectivityManager.hasDataConnectivity()){
                loadURL=viewPagerList.get(position).getModelImageUrl();
            }
            else {
                String fileName=viewPagerList.get(position).getModelImageUrl();
                fileName = fileName.replace(':', '/');
                fileName = fileName.replace('/', '_');
                loadURL="file://"+Environment.getExternalStorageDirectory()+"/"+folder+"/"+fileName;
            }
            BaseActivity.imageLoader.displayImage(loadURL, imageView, options, new SimpleImageLoadingListener() {
                @Override
                public void onLoadingStarted(String imageUri, View view) {
                    spinner.setVisibility(View.VISIBLE);
                }

                @Override
                public void onLoadingFailed(String imageUri, View view, FailReason failReason) {
                    String message = null;
                    switch (failReason) {
                    case IO_ERROR:
                        message = "Input/Output error";
                        break;
                    case OUT_OF_MEMORY:
                        message = "Out Of Memory error";
                        break;
                    case NETWORK_DENIED:
                        message = "Downloads are denied";
                        break;
                    case UNSUPPORTED_URI_SCHEME:
                        message = "Unsupported URI scheme";
                        break;
                    case UNKNOWN:
                        message = "Unknown error";
                        break;
                    }
                    Toast.makeText(context, message, Toast.LENGTH_SHORT).show();

                    spinner.setVisibility(View.GONE);
                }

                @Override
                public void onLoadingComplete(final String imageUri, View view, final Bitmap loadedImage) {
                    spinner.setVisibility(View.GONE);
                    Logger.show(Log.INFO, "@@@@@@@", imageUri);
                    String uniqueUrlName = imageUri.replace(':', '/');
                    uniqueUrlName = uniqueUrlName.replace('/', '_');

                    File file = new File(Environment.getExternalStorageDirectory()
                            .toString()
                            + "/"
                            + folder
                            + "/"
                            + uniqueUrlName);
                    if(!file.exists()){
                        new Thread(new Runnable() {

                            public void run() {
                                String imageUrlString="file://"+GetModels.getModelURL(imageUri,folder,loadedImage,context);
                                Logger.show(Log.INFO, context.getClass().getName(), "image loaded my folfer"+ imageUrlString);
                            }
                        }).start();
                    }
                    Logger.show(Log.INFO, context.getClass().getName(), "image loaded loader "+ StorageUtils.getCacheDirectory(context));

                }  
            });

            imageView.setOnClickListener(new View.OnClickListener() {

                public void onClick(View v) {

                    Bundle b=new Bundle();
                    b.putString("ProductName", viewPagerList.get(pos).getModelName());
                    b.putString("ProductPrice", viewPagerList.get(pos).getModelPrice());
                    b.putString("ProductUrl",viewPagerList.get(pos).getModelLink() );
                    String loadURL=null;
                    if(connectivityManager.hasDataConnectivity()){
                        loadURL=viewPagerList.get(pos).getModelImageUrl();
                    }
                    else {
                        String fileName=viewPagerList.get(pos).getModelImageUrl();
                        fileName = fileName.replace(':', '/');
                        fileName = fileName.replace('/', '_');
                        loadURL="file://"+Environment.getExternalStorageDirectory()+"/"
                                +folder+"/"+fileName;
                    }
                    b.putString("ProductImage", loadURL);
                    FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
                    FragmentTransaction fragmentTransaction = fragmentManager
                            .beginTransaction();
                    fragmentTransaction.setCustomAnimations(R.anim.slide_in_right, R.anim.slide_out_left,R.anim.slide_in_left, R.anim.slide_out_right);
                    ProductOverview commentFragment = new ProductOverview();
                    commentFragment.setArguments(b);
                    fragmentTransaction.replace(R.id.product_container, commentFragment);
                    fragmentTransaction.addToBackStack(null);
                    fragmentTransaction.commit();

                }
            });
            ((ViewPager) container).addView(imageLayout, 0);
            return imageLayout;
        }

        @Override
        public void destroyItem(ViewGroup container, int position, Object object) {
            ((ViewPager) container).removeView((View) object);
        }
        @Override
        public void restoreState(Parcelable state, ClassLoader loader) {
        }

        @Override
        public Parcelable saveState() {
            return null;
        }

        @Override
        public void startUpdate(View container) {
        }
    }

Hier bin ich Entsendung code zum abrufen der Datei-Namen von "directory". Sie brauchen, um einige der anderen Aufgabe Ihrer selbst.

File imgDir = new File(Environment.getExternalStorageDirectory()+ File.separator + "directory");

if (!imgDir.exists())
    imgDir.mkdir();

String files[] = imgDir.list();

Nun überprüfen, ob "files[]" null ist oder nicht.

if (files == null)
    //no files
else{
    count = files.length;
    //do something
}

Haben Sie die Liste der Dateien mit deren Pfad, Holen sich bitmap von Ihnen und die Anzeige im grid.

Hinweis:

Drucken vollständigen Pfad verwenden Sie folgenden code.

imgDir.getAbsolutePath() + File.separator + files[i]);