ImagePagerActivity.java

/*******************************************************************************
 * 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.dayscript.bichitofutbolapp;

import java.util.ArrayList;

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.util.Log;
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.actionbarsherlock.app.SherlockFragmentActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuItem;
import com.dayscript.bichitofutbolapp.utils.ImageUtils;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.FailReason;
import com.nostra13.universalimageloader.core.assist.ImageScaleType;
import com.nostra13.universalimageloader.core.assist.SimpleImageLoadingListener;
import com.nostra13.universalimageloader.core.display.FadeInBitmapDisplayer;

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

	private static final String STATE_POSITION = "STATE_POSITION";
	ArrayList<String> imageUrls;
	DisplayImageOptions options;
	ImageLoader imageLoader;
	ViewPager pager;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.ac_image_pager);
		Bundle bundle = getIntent().getExtras();
		imageUrls = bundle.getStringArrayList("imagenes");
		Log.v("Pager", imageUrls.toString());
		int pagerPosition = bundle.getInt("posicion", 0);

		if (savedInstanceState != null) {
			pagerPosition = savedInstanceState.getInt(STATE_POSITION);
		}

		options = new DisplayImageOptions.Builder()
			.showImageForEmptyUri(R.drawable.ic_empty)
			.showImageOnFail(R.drawable.ic_error)
			.resetViewBeforeLoading()
			.cacheOnDisc()
			.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);
		
		this.getSupportActionBar().setDisplayHomeAsUpEnabled(true);
	}
	
	public boolean onCreateOptionsMenu(Menu menu) {
		this.getSherlock().getMenuInflater().inflate(R.menu.news_detail_menu, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		if(item.getItemId()==android.R.id.home)
		{
			finish();
		}
		return super.onOptionsItemSelected(item);
	}

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

	private class ImagePagerAdapter extends PagerAdapter {

		private ArrayList<String> images;
		private LayoutInflater inflater;

		ImagePagerAdapter(ArrayList<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.size();
		}

		@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);
			final ProgressBar spinner = (ProgressBar) imageLayout.findViewById(R.id.loading);
			ImageLoader imageLoader;
			imageLoader= ImageUtils.getImageLoader(getBaseContext());
			imageLoader.init(ImageLoaderConfiguration.createDefault(getBaseContext()));
			imageLoader.displayImage(imageUrls.get(position), imageView, options);
			((ViewPager) 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;
		}

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