/** * 文件操作工具类,执行文件的创建、移动、粘贴、重命名、删除等 * 任务的异步执行和IOperationProgressListener。 拷贝和删除等操作,是比较费时的,采用了异步执行的方式~ http://blog.csdn.net/xufenghappy6/article/details/7343899 异步执行+事件通知 是一种比较流行的模式,比同步等待很多时候要好。 */ public class FileOperationHelper { private static final String LOG_TAG = "FileOperation"; private ArrayList<FileInfo> mCurFileNameList = new ArrayList<FileInfo>(); private boolean mMoving; private IOperationProgressListener mOperationListener; private FilenameFilter mFilter; public interface IOperationProgressListener { void onFinish(); void onFileChanged(String path); } public FileOperationHelper(IOperationProgressListener l) { mOperationListener = l; } public void setFilenameFilter(FilenameFilter f) { mFilter = f; } //根据路径和文件名,创建文件 public boolean CreateFolder(String path, String name) { Log.v(LOG_TAG, "CreateFolder >>> " + path + "," + name); File f = new File(Util.makePath(path, name)); if (f.exists()) return false; return f.mkdir(); } //拷贝若干个文件,把文件集合拷贝到“当前文件集合中mCurFileNameList”,可以供“粘贴操作”使用 public void Copy(ArrayList<FileInfo> files) { copyFileList(files); } //粘贴,把当前文件集合中“mCurFileNameList”的文件,拷贝到目标路径下 public boolean Paste(String path) { if (mCurFileNameList.size() == 0) return false; final String _path = path; //异步执行某个任务 asnycExecute(new Runnable() { @Override public void run() { for (FileInfo f : mCurFileNameList) { CopyFile(f, _path); } //通知操作变化 mOperationListener.onFileChanged(Environment .getExternalStorageDirectory() .getAbsolutePath()); //粘贴之后,需要清空mCurFileNameList clear(); } }); return true; } //是否可以“粘贴”,mCurFileNameList有元素 public boolean canPaste() { return mCurFileNameList.size() != 0; } //开始移动,标记“正在移动”,拷贝文件集合 public void StartMove(ArrayList<FileInfo> files) { if (mMoving) return; mMoving = true; copyFileList(files); } //移动状态 public boolean isMoveState() { return mMoving; } /** * 能否移走,假设path是“C:/a/b”,f.filePath是“C:、/a/b/c/d.png”,不能移走 * 感覺不太靠譜,爲啥不能移動到文件的上層目錄呢? * @param path * @return */ public boolean canMove(String path) { for (FileInfo f : mCurFileNameList) { if (!f.IsDir) continue; if (Util.containsPath(f.filePath, path)) return false; } return true; } //清空当前文件集合 public void clear() { synchronized(mCurFileNameList) { mCurFileNameList.clear(); } } //停止移动,移动文件是异步执行,结束后有事件通知 public boolean EndMove(String path) { if (!mMoving) return false; mMoving = false; if (TextUtils.isEmpty(path)) return false; final String _path = path; asnycExecute(new Runnable() { @Override public void run() { for (FileInfo f : mCurFileNameList) { MoveFile(f, _path); } mOperationListener.onFileChanged(Environment .getExternalStorageDirectory() .getAbsolutePath()); clear(); } }); return true; } public ArrayList<FileInfo> getFileList() { return mCurFileNameList; } //异步执行某个任务 //android的类AsyncTask对线程间通讯进行了包装,提供了简易的编程方式来使后台线程和UI线程进行通讯:后台线程执行异步任务,并把操作结果通知UI线程。 //可以参考http://blog.csdn.net/xufenghappy6/article/details/7343899 private void asnycExecute(Runnable r) { final Runnable _r = r; new AsyncTask() { @Override protected Object doInBackground(Object... params) { synchronized(mCurFileNameList) { _r.run(); } if (mOperationListener != null) { mOperationListener.onFinish(); } return null; } }.execute(); } //某个路径是否被选中 public boolean isFileSelected(String path) { synchronized(mCurFileNameList) { for (FileInfo f : mCurFileNameList) { if (f.filePath.equalsIgnoreCase(path)) return true; } } return false; } //文件重命名 public boolean Rename(FileInfo f, String newName) { if (f == null || newName == null) { Log.e(LOG_TAG, "Rename: null parameter"); return false; } File file = new File(f.filePath); String newPath = Util.makePath(Util.getPathFromFilepath(f.filePath), newName); final boolean needScan = file.isFile(); try { boolean ret = file.renameTo(new File(newPath)); if (ret) { if (needScan) { mOperationListener.onFileChanged(f.filePath); } mOperationListener.onFileChanged(newPath); } return ret; } catch (SecurityException e) { Log.e(LOG_TAG, "Fail to rename file," + e.toString()); } return false; } //删除若干文件,先copy文件集合,再异步执行删除操作,删除完成后,有通知 public boolean Delete(ArrayList<FileInfo> files) { copyFileList(files); asnycExecute(new Runnable() { @Override public void run() { for (FileInfo f : mCurFileNameList) { DeleteFile(f); } mOperationListener.onFileChanged(Environment .getExternalStorageDirectory() .getAbsolutePath()); clear(); } }); return true; } //删除1个文件 protected void DeleteFile(FileInfo f) { if (f == null) { Log.e(LOG_TAG, "DeleteFile: null parameter"); return; } File file = new File(f.filePath); boolean directory = file.isDirectory(); if (directory) { for (File child : file.listFiles(mFilter)) { if (Util.isNormalFile(child.getAbsolutePath())) { DeleteFile(Util.GetFileInfo(child, mFilter, true)); } } } file.delete(); Log.v(LOG_TAG, "DeleteFile >>> " + f.filePath); } //执行1个文件的拷贝,如果文件是目录,拷贝整个目录,可能有递归Copy private void CopyFile(FileInfo f, String dest) { if (f == null || dest == null) { Log.e(LOG_TAG, "CopyFile: null parameter"); return; } File file = new File(f.filePath); if (file.isDirectory()) { // directory exists in destination, rename it String destPath = Util.makePath(dest, f.fileName); File destFile = new File(destPath); int i = 1; while (destFile.exists()) { destPath = Util.makePath(dest, f.fileName + " " + i++); destFile = new File(destPath); } for (File child : file.listFiles(mFilter)) { if (!child.isHidden() && Util.isNormalFile(child.getAbsolutePath())) { CopyFile(Util.GetFileInfo(child, mFilter, Settings.instance().getShowDotAndHiddenFiles()), destPath); } } } else { String destFile = Util.copyFile(f.filePath, dest); } Log.v(LOG_TAG, "CopyFile >>> " + f.filePath + "," + dest); } //移动文件,通过重命名的方式,移动的 private boolean MoveFile(FileInfo f, String dest) { Log.v(LOG_TAG, "MoveFile >>> " + f.filePath + "," + dest); if (f == null || dest == null) { Log.e(LOG_TAG, "CopyFile: null parameter"); return false; } File file = new File(f.filePath); String newPath = Util.makePath(dest, f.fileName); try { return file.renameTo(new File(newPath)); } catch (SecurityException e) { Log.e(LOG_TAG, "Fail to move file," + e.toString()); } return false; } //把文件集合copy到mCurFileNameList中,同步~ private void copyFileList(ArrayList<FileInfo> files) { synchronized(mCurFileNameList) { mCurFileNameList.clear(); for (FileInfo f : files) { mCurFileNameList.add(f); } } } }
时间: 2024-10-11 13:20:36