android tif 解析 bitmap 工程

/* libtiffdecoder A tiff decoder run on android system. Copyright (C) 2009 figofuture * * This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later * version. * * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * */ package android.widget; import java.io.File; import java.util.ArrayList; import java.util.List; import java.util.Set; import java.util.TreeSet; import com.tiffviewer.R; import android.app.ListActivity; import android.content.Context; import android.content.res.Resources; import android.os.Bundle; import android.view.Gravity; import android.view.View; import android.view.ViewGroup; public abstract class FileDialog extends ListActivity { private final static String LOG_TAG = "FileDialog"; /** * text we use for the parent directory */ private final static String PARENT_DIR = ".."; /** * Currently displayed files */ private final List<String> mCurrentFiles = new ArrayList<String>(); /** * Currently displayed directory */ private File mCurrentDir = null; public void onPostFileAccessIntent( final File file) { } public void onCreate(final Bundle icicle) { super.onCreate(icicle); // go to the root directory try { showDirectory("/"); } catch (NullPointerException e) { showDirectory("/"); } getListView().setSelector(getResources().getDrawable(R.drawable.bk_listitem_focus)); } protected void onListItemClick(final ListView l, final View v, final int position, final long id) { if (position == 0 && PARENT_DIR.equals(this.mCurrentFiles.get(0))) { showDirectory(this.mCurrentDir.getParent()); } else { final File file = new File(this.mCurrentFiles.get(position)); if (file.isDirectory()) { showDirectory(file.getAbsolutePath()); } else { onPostFileAccessIntent(file); } } } /** * Show the contents of a given directory as a selectable list * * @param path the directory to display */ private void showDirectory(final String path) { // we clear any old content and add an entry to get up one level this.mCurrentFiles.clear(); this.mCurrentDir = new File(path); if (this.mCurrentDir.getParentFile() != null) { this.mCurrentFiles.add(PARENT_DIR); } // get all directories and files in the given path final File[] files = this.mCurrentDir.listFiles(); //if( null == files ) //return; final Set<String> sorted = new TreeSet<String>(); if ( null != files ){ for (final File file : files) { final String name = file.getAbsolutePath(); if (file.isDirectory()) { sorted.add(name); } else { final String extension = name.indexOf('.') > 0 ? name.substring(name.lastIndexOf('.') + 1) : ""; if (null == getAcceptedFileTypes() || getAcceptedFileTypes().contains(extension.toLowerCase())) { sorted.add(name); } } } this.mCurrentFiles.addAll(sorted); } // display these images final Context context = this; ArrayAdapter<String> filenamesAdapter = new ArrayAdapter<String>(this, getTextView(), this.mCurrentFiles) { public View getView(final int position, final View convertView, final ViewGroup parent) { return new IconifiedTextLayout(context, getItem(position), position); } }; setListAdapter(filenamesAdapter); } // new layout displaying a text and an associated image class IconifiedTextLayout extends LinearLayout { public IconifiedTextLayout(final Context context, final String path, final int position) { super(context); setOrientation(HORIZONTAL); // determine icon to display final ImageView imageView = new ImageView(context); final File file = new File(path); if (position == 0 && PARENT_DIR.equals(path)) { imageView.setImageResource(getParentFolderImage()); } else { if (file.isDirectory()) { if( file.getName().equalsIgnoreCase("system") || file.getName().equalsIgnoreCase("data")) imageView.setImageResource(getInternalStorageImage()); else if (file.getName().equalsIgnoreCase("sdcard")) imageView.setImageResource(getExternalStorageImage()); else imageView.setImageResource(getFolderImage()); } else { imageView.setImageResource(getFileImage()); } } imageView.setPadding(0, 1, 5, 0); // create view for the directory name final TextView textView = new TextView(context); textView.setText(file.getName()); Resources resources = getBaseContext().getResources(); textView.setTextColor(resources.getColor(R.color.tab_tag_text_focus)); textView.setGravity(Gravity.CENTER); textView.setTextSize(24); addView(imageView, new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); addView(textView, new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT)); } } // methods to be implemented by subclasses /** * Get the list of file extensions which are accepted by the file dialog * * @return null to accept all files, or a list of lowercase file extensions */ public abstract List<String> getAcceptedFileTypes(); /** * Get the TextView resource used for the TextView inside the list * * @return layout resource id */ public abstract int getTextView(); /** * Get the image used for navigating to the parent folder * * @return image resource id */ public abstract int getParentFolderImage(); /** * Get the image denoting a folder * * @return image resource id */ public abstract int getFolderImage(); /** * Get the image denoting a file to select * * @return image resource id */ public abstract int getFileImage(); public abstract int getExternalStorageImage(); public abstract int getInternalStorageImage(); }