com.lanbiao.youxiaoyunfamily.activity.ImagePagerActivity.java Source code

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Here is the source code for com.lanbiao.youxiaoyunfamily.activity.ImagePagerActivity.java

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/*******************************************************************************
 * Copyright 2011-2013 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.lanbiao.youxiaoyunfamily.activity;

import android.app.Activity;
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 com.lanbiao.youxiaoyunfamily.R;
import com.lanbiao.youxiaoyunfamily.loadimg.ImageDownloadTask;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;
import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;

/**
 * ViewPagerActivity
 * 
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
 */
public class ImagePagerActivity extends Activity {
    static ImageLoader imageLoader = ImageLoader.getInstance();
    private static final String STATE_POSITION = "STATE_POSITION";

    DisplayImageOptions options;

    ViewPager pager;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.ac_image_pager);

        Bundle bundle = getIntent().getExtras();
        //urlbitmap
        String[] imageUrls = bundle.getStringArray("img");
        // View
        int pagerPosition = bundle.getInt("p", 0);
        // 
        if (savedInstanceState != null) {
            pagerPosition = savedInstanceState.getInt(STATE_POSITION);
        }

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

        pager = (ViewPager) findViewById(R.id.pager);
        pager.setAdapter(new ImagePagerAdapter(imageUrls));
        pager.setCurrentItem(pagerPosition); // View
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        // 
        outState.putInt(STATE_POSITION, pager.getCurrentItem());
    }

    private class ImagePagerAdapter extends PagerAdapter {

        private String[] images;
        private LayoutInflater inflater;

        ImagePagerAdapter(String[] images) {
            this.images = images;
            inflater = getLayoutInflater();
        }

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

        @Override
        public void finishUpdate(View container) {
        }

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

        @Override
        public Object instantiateItem(ViewGroup view, int position) {
            View imageLayout = inflater.inflate(R.layout.item_pager_image, view, false);
            ImageView imageView = (ImageView) imageLayout.findViewById(R.id.image);
            String img = images[position];
            try {
                ImageDownloadTask imgtask = new ImageDownloadTask();
                imgtask.execute(img, imageView);
            } catch (Exception e) {
                e.printStackTrace();
            }

            ((ViewPager) view).addView(imageLayout, 0); // ViewPager
            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;
        }

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