Java tutorial
/******************************************************************************* * 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.kenny.Image; import java.io.File; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.content.Intent; import android.graphics.Bitmap; import android.net.Uri; import android.os.Bundle; import android.os.Parcelable; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.BaseAdapter; import android.widget.Gallery; import android.widget.ImageView; import android.widget.ProgressBar; import android.widget.Toast; import com.kenny.imgviewer.R; 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; /** * @author Sergey Tarasevich (nostra13[at]gmail[dot]com) */ public class ImageGalleryPagerActivity extends Activity { private static final String STATE_POSITION = "STATE_POSITION"; protected ImageLoader imageLoader = ImageLoader.getInstance(); DisplayImageOptions options; private List<String> imageUrls = null; private ViewPager pager; private Gallery gallery; private int pagerPosition = 0; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.ac_image_gallery_pager); Bundle bundle = getIntent().getExtras(); assert bundle != null; // imageUrls = bundle.getStringArray(Extra.IMAGES); // int pagerPosition = bundle.getInt(Extra.IMAGE_POSITION, 0); // IntentGridView Intent intent = getIntent(); Uri uri = (Uri) intent.getData(); String path = null; if (uri != null) { path = uri.getPath(); } if (path == null) { Log.v("tag", path); path = android.os.Environment.getExternalStorageDirectory().getAbsolutePath(); } imageUrls = setFilePath(path); 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).considerExifParams(true) .displayer(new FadeInBitmapDisplayer(300)).build(); pager = (ViewPager) findViewById(R.id.pager); pager.setAdapter(new ImagePagerAdapter(imageUrls)); pager.setCurrentItem(pagerPosition); pager.setOnPageChangeListener(new OnPageChangeListener() { @Override public void onPageSelected(int arg0) { // TODO Auto-generated method stub gallery.setSelection(arg0); ImageGalleryPagerActivity.this.setTitle(imageUrls.get(arg0)); } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { // TODO Auto-generated method stub } @Override public void onPageScrollStateChanged(int arg0) { // TODO Auto-generated method stub } }); gallery = (Gallery) findViewById(R.id.gallery); gallery.setAdapter(new ImageGalleryAdapter()); gallery.setSelection(pagerPosition); gallery.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { startImagePagerActivity(position); } }); // Intent intent = new Intent(); // intent.setClassName("com.kenny.KFileManager", "com.kenny.file.Activity.SettingPage"); // startActivity(intent); } private static final String TAG = "wmh"; public List<String> setFilePath(String path) { File file = new File(path); String SelectFileName = null; if (!file.isDirectory()) { SelectFileName = file.getName(); } String mCurrentPath = file.getParent(); Log.v(TAG, "setFilePath:start"); ArrayList<String> mFileList = new ArrayList<String>(); File mFile = new File(mCurrentPath); String[] mFiles = mFile.list();// / if (mFiles != null) { /* */ for (String mCurrentFile : mFiles) { if (mCurrentFile.length() < 5) { continue; } String fileEnds = mCurrentFile.substring(mCurrentFile.length() - 4); if (fileEnds.equals(".jpg") || fileEnds.equals(".gif") || fileEnds.equals(".png") || fileEnds.equals(".jpeg") || fileEnds.equals(".bmp")) { if (SelectFileName != null && mCurrentFile.equals(SelectFileName)) { pagerPosition = mFileList.size(); } mFileList.add("file://" + mCurrentPath + "//" + mCurrentFile); } } // Collections.sort(mFileList, new FileSort()); } Log.v(TAG, "setFilePath:end"); return mFileList; } // private int LoadImageList() // { // mImageList.clear(); // List<FileBean> mFileList = FileManager.getInstance().getFileList(); // for (int i = 0; i < mFileList.size(); i++) // { // FileBean bean = mFileList.get(i); // // String fileEnds = bean.getFileEnds(); // if (fileEnds.equals("jpg") || fileEnds.equals("gif") // || fileEnds.equals("png") || fileEnds.equals("jpeg") // || fileEnds.equals("bmp")) // { // if (bean.getFilePath().equals(path)) // { // i_position = mImageList.size(); // } // mImageList.add(bean); // } // } // Log.v(TAG,"i_position=" + i_position); // g.setSelection(i_position); // ia.notifyDataSetChanged(); // } private void startImagePagerActivity(int position) { // Intent intent = new Intent(this, ImagePagerActivity.class); // intent.putExtra(Extra.IMAGES, imageUrls); // intent.putExtra(Extra.IMAGE_POSITION, position); // startActivity(intent); pager.setCurrentItem(position); } private class ImageGalleryAdapter extends BaseAdapter { @Override public int getCount() { return imageUrls.size(); } @Override public Object getItem(int position) { return position; } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { ImageView imageView = (ImageView) convertView; if (imageView == null) { imageView = (ImageView) getLayoutInflater().inflate(R.layout.item_gallery_image, parent, false); } imageLoader.displayImage(imageUrls.get(position), imageView, options); return imageView; } } @Override public void onSaveInstanceState(Bundle outState) { outState.putInt(STATE_POSITION, pager.getCurrentItem()); } private class ImagePagerAdapter extends PagerAdapter { private List<String> images; private LayoutInflater inflater; ImagePagerAdapter(List<String> images) { this.images = images; inflater = getLayoutInflater(); } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object); } @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); assert imageLayout != null; ImageView imageView = (ImageView) imageLayout.findViewById(R.id.image); final ProgressBar spinner = (ProgressBar) imageLayout.findViewById(R.id.loading); imageLoader.displayImage(images.get(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(ImageGalleryPagerActivity.this, 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; } } }