com.example.admin.angpangii.fragment.ImagePagerFragment.java Source code

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Here is the source code for com.example.admin.angpangii.fragment.ImagePagerFragment.java

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/*******************************************************************************
 * Copyright 2011-2014 Sergey Tarasevich
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.example.admin.angpangii.fragment;

import android.content.Context;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.FailReason;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;
import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;
import com.nostra13.universalimageloader.core.listener.SimpleImageLoadingListener;
import com.example.admin.angpangii.Constants;
import com.example.admin.angpangii.R;

/**
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
 */
public class ImagePagerFragment extends BaseFragment {

    public static final int INDEX = 2;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fr_image_pager, container, false);
        ViewPager pager = (ViewPager) rootView.findViewById(R.id.pager);
        pager.setAdapter(new ImageAdapter(getActivity()));
        pager.setCurrentItem(getArguments().getInt(Constants.Extra.IMAGE_POSITION, 0));
        return rootView;
    }

    private static class ImageAdapter extends PagerAdapter {

        private static final String[] IMAGE_URLS = Constants.IMAGES;

        private LayoutInflater inflater;
        private DisplayImageOptions options;

        ImageAdapter(Context context) {
            inflater = LayoutInflater.from(context);

            options = new DisplayImageOptions.Builder().showImageForEmptyUri(R.drawable.ic_empty)
                    .showImageOnFail(R.drawable.ic_error).resetViewBeforeLoading(true).cacheOnDisk(true)
                    .imageScaleType(ImageScaleType.EXACTLY).bitmapConfig(Bitmap.Config.RGB_565)
                    .considerExifParams(true).displayer(new FadeInBitmapDisplayer(300)).build();
        }

        @Override
        public void destroyItem(ViewGroup container, int position, Object object) {
            container.removeView((View) object);
        }

        @Override
        public int getCount() {
            return IMAGE_URLS.length;
        }

        @Override
        public Object instantiateItem(ViewGroup view, int position) {
            View imageLayout = inflater.inflate(R.layout.item_pager_image, view, false);
            assert imageLayout != null;
            ImageView imageView = (ImageView) imageLayout.findViewById(R.id.image);
            final ProgressBar spinner = (ProgressBar) imageLayout.findViewById(R.id.loading);

            ImageLoader.getInstance().displayImage(IMAGE_URLS[position], 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.getType()) {
                            case IO_ERROR:
                                message = "Input/Output error";
                                break;
                            case DECODING_ERROR:
                                message = "Image can't be decoded";
                                break;
                            case NETWORK_DENIED:
                                message = "Downloads are denied";
                                break;
                            case OUT_OF_MEMORY:
                                message = "Out Of Memory error";
                                break;
                            case UNKNOWN:
                                message = "Unknown error";
                                break;
                            }
                            Toast.makeText(view.getContext(), message, Toast.LENGTH_SHORT).show();

                            spinner.setVisibility(View.GONE);
                        }

                        @Override
                        public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
                            spinner.setVisibility(View.GONE);
                        }
                    });

            view.addView(imageLayout, 0);
            return imageLayout;
        }

        @Override
        public boolean isViewFromObject(View view, Object object) {
            return view.equals(object);
        }

        @Override
        public void restoreState(Parcelable state, ClassLoader loader) {
        }

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