标签：文件管理器 fileexplorer 小米 开源 android
文件操作是非常通用的，注释都写在源代码中了，不多说~package net.micode.fileexplorer.util;
import java.io.File;
import java.io.FilenameFilter;
import java.util.ArrayList;
import net.micode.fileexplorer.model.FileInfo;
import android.os.AsyncTask;
import android.os.Environment;
import android.text.TextUtils;
import android.util.Log;
/**文件操作工具类，执行文件的创建、移动、粘贴、重命名、删除等*/
public class FileOperationHelper {
private static final String LOG_TAG = "FileOperation";
//内部文件集合，用来临时保存复制、移动等操作，用户选择的文件集合
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;
}
//能否移动，假设path为“C:/a/b”,f.filePath为“C:、/a/b/c/d.png”,不能移动
//TODO 感觉不太靠谱啊，为啥不能移动到文件的上级目录呢？
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);
}
}
}
}版权声明：本文为博主原创文章，未经博主允许不得转载。
小米开源文件管理器MiCodeFileExplorer-源码研究(4)-文件操作工具类FileOperationHelper
标签：文件管理器 fileexplorer 小米 开源 android
原文地址：http://blog.csdn.net/fansunion/article/details/49466903
