Java tutorial
/* * The MIT License (MIT) * * Copyright (c) 2014-2015 Umeng, Inc * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.umeng.common.ui.adapters; import android.content.DialogInterface.OnDismissListener; import android.graphics.Bitmap; import android.graphics.Point; import android.support.v4.view.PagerAdapter; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.widget.ImageView; import android.widget.ProgressBar; import com.umeng.comm.core.beans.ImageItem; import com.umeng.comm.core.imageloader.ImgDisplayOption; import com.umeng.comm.core.imageloader.LocalImageLoader; import com.umeng.comm.core.imageloader.UMImageLoader; import com.umeng.comm.core.imageloader.UMImageLoader.ImageLoadingListener; import com.umeng.comm.core.imageloader.cache.ImageCache; import com.umeng.comm.core.sdkmanager.ImageLoaderManager; import com.umeng.comm.core.utils.Md5Helper; import com.umeng.comm.core.utils.ResFinder; import com.umeng.common.ui.presenter.impl.ImageBrowserPresenter; import com.umeng.common.ui.widgets.ScaleImageView; import java.util.ArrayList; import java.util.LinkedList; import java.util.List; /** * feed?Adapter */ public class ImagePagerAdapter extends PagerAdapter { private final List<ImageItem> mPaths = new ArrayList<ImageItem>(); UMImageLoader mImageLoader; public boolean isPreView = false;// ? private OnDismissListener mListener; ImageBrowserPresenter mPresenter; /** * path MD5,key */ private List<String> mCachedImagePath = new LinkedList<String>(); public ImagePagerAdapter() { mImageLoader = ImageLoaderManager.getInstance().getCurrentSDK(); } @Override public int getCount() { return mPaths.size(); } @Override public Object instantiateItem(ViewGroup container, int position) { if (mPresenter == null) { mPresenter = new ImageBrowserPresenter(container.getContext()); } View view = createView(container, mPaths.get(position)); container.addView(view, LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); return view; } /** * ' URLMD5,Dialog? * * @param originPath */ private void storeImageItemMd5(String originPath) { String md5 = Md5Helper.toMD5(originPath); mCachedImagePath.add(md5); } @Override public boolean isViewFromObject(View view, Object object) { return view == object; } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object); } /** * ?View? */ @Override public int getItemPosition(Object object) { return POSITION_NONE; } public void addImagePaths(List<ImageItem> paths) { mPaths.addAll(paths); notifyDataSetChanged(); } private void clearImageCache() { for (String md5 : mCachedImagePath) { ImageCache.getInstance().removeFromMemory(md5); } } public void cleanCache() { mPaths.clear(); notifyDataSetChanged(); // clearImageCache(); mImageLoader.reset(); } private View createView(final ViewGroup parent, final ImageItem imageItem) { // int layoutResId = ResFinder.getLayout("umeng_comm_img_browser_item_layout"); View rootView = LayoutInflater.from(parent.getContext()).inflate(layoutResId, parent, false); return setupWidgets(rootView, imageItem); } private View setupWidgets(View rootView, final ImageItem imageItem) { // ImageView int imageResId = ResFinder.getId("umeng_comm_imagebrowser_view"); final ScaleImageView imageView = (ScaleImageView) rootView.findViewById(imageResId); imageView.setOndismissListener(mListener); final String middleImgUrl = imageItem.middleImageUrl; // ? View saveView = rootView.findViewById(ResFinder.getId("umeng_comm_save_img_tv")); if (isPreView) { saveView.setVisibility(View.GONE); mImageLoader.displayImage(middleImgUrl, imageView); return imageView; } final ProgressBar progressBar = (ProgressBar) rootView .findViewById(ResFinder.getId("umeng_comm_image_progressbar")); // ? saveView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { mPresenter.saveImage(middleImgUrl); } }); // rootView.findViewById(ResFinder.getId("umeng_comm_origin_img_tv")) .setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { displayImage(imageView, progressBar, imageItem, true); } }); // displayImage(imageView, progressBar, imageItem, false); return rootView; } /** * ,ImageItem?,originImage?true. * * @param imageView ImageView * @param progressBar ? * @param image ImageItem * @param originImage ? */ private void displayImage(ImageView imageView, final ProgressBar progressBar, final ImageItem image, boolean originImage) { String imageUrl = originImage ? image.originImageUrl : image.middleImageUrl; // URLMD5, storeImageItemMd5(imageUrl); // Bitmap bitmap = LocalImageLoader.getInstance().loadBitmap(imageUrl, getSize(imageView)); ImgDisplayOption option = null; if (bitmap == null) { option = ImgDisplayOption.getCommonDisplayOption(); } else { imageView.setImageBitmap(bitmap); option = new ImgDisplayOption(); } // ? option.requestOrigin = true; mImageLoader.displayImage(imageUrl, imageView, option, new ImageLoadingListener() { @Override public void onLoadingStarted(String imageUri, View view) { // Dialog progressBar.setVisibility(View.VISIBLE); } @Override public void onLoadingFailed(String imageUri, View view) { } @Override public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) { // Dialog progressBar.setVisibility(View.GONE); if (view == null) { return; } ScaleImageView imageView = (ScaleImageView) view; if (isUriEqualsWithImageViewTag(imageView.getTag(), imageUri) && loadedImage != null) { imageView.setImageBitmap(loadedImage); imageView.updateScale(); } } }); } /** * ?imagewrap_content,match_parent250</br> * * @param imageView * @return */ private Point getSize(ImageView imageView) { Point size = new Point(); if (imageView.getWidth() > 0) { size.x = imageView.getWidth(); size.y = imageView.getHeight(); } else { size.x = size.y = 500; } return size; } private boolean isUriEqualsWithImageViewTag(Object tag, String url) { return tag != null && !TextUtils.isEmpty(url) && tag.equals(url); } public void setOnDismissListener(OnDismissListener listener) { mListener = listener; } }