最近写了一个文件管理deamo，主要功能文件浏览，新建文件目录，文件删除以及重命名相关功能，
效果图：
详细如下；
package com.taskmanage.file;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.GestureDetector.OnGestureListener;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
public class FileActivity extends Activity implements OnItemClickListener,OnItemLongClickListener{
private ListView fileview;
private String path = "/sdcard";
//文件路径
private List<Map<String, Object>> items;
//内容适配器
private SimpleAdapter adapter;
//备份文件父目录
private File backFile=null;
//当前文件目录
private String currentPath="/sdcard";
//文件是否成功删除
private boolean flag;
@Override
protected void onCreate(Bundle savedInstanceState) {
setContentView(R.layout.files);
setTitle("文件管理器");
fileview = (ListView) findViewById(R.id.filelist);
listDir(path);
super.onCreate(savedInstanceState);
}
/**
* 动态绑定文件信息到listview上
* @param path
*/
private void listDir(String path){
items=bindList(path);
//if(items!=null){
adapter = new SimpleAdapter(this, items, R.layout.file_row,
new String[] { "name", "path" ,"img"}, new int[] { R.id.name,
R.id.desc ,R.id.img});
fileview.setAdapter(adapter);
fileview.setOnItemClickListener(this);
fileview.setOnItemLongClickListener(this);
fileview.setSelection(0);
//}
}
/**
* 返回所有文件目录信息
* @param path
* @return
*/
private List<Map<String, Object>> bindList(String path){
File[] files = new File(path).listFiles();
//if(files!=null){
List<Map<String, Object>> list= new ArrayList<Map<String, Object>>(files.length);
Map<String, Object> root = new HashMap<String, Object>();
root.put("name", "/sdcard");
root.put("img", R.drawable.file_root);
root.put("path", "root directory");
list.add(root);
Map<String, Object> pmap = new HashMap<String, Object>();
pmap.put("name", "back");
pmap.put("img", R.drawable.file_paranet);
pmap.put("path", "paranet Directory");
list.add(pmap);
for (File file : files){
Map<String, Object> map = new HashMap<String, Object>();
if(file.isDirectory()){
map.put("img", R.drawable.directory);
}else{
map.put("img", R.drawable.file_doc);
}
map.put("name", file.getName());
map.put("path", file.getPath());
list.add(map);
}
return list;
/*}
return null;*/
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
if (position == 0) {//返回到/sdcard目录
path = "/sdcard";
listDir(path);
}else if(position == 1){//返回上一级目录
toParent();
} else {
if(items!=null){
path = (String) items.get(position).get("path");
File file = new File(path);
if (file.canRead()&&file.canExecute()&&file.isDirectory()){
listDir(path);
}
else{
openFile(file);
Toast.makeText(this,"no dir",Toast.LENGTH_SHORT).show();
}
}
}
backFile=new File(path);
}
private void toParent() {//回到父目录
File file = new File(path);
File parent = file.getParentFile();
if(parent == null){
listDir(path);
}else{
path = parent.getAbsolutePath();
listDir(path);
}
}
/**
* 文件操作提示
* @param id
*/
private void Mydialog(int id){
AlertDialog.Builder builder=new AlertDialog.Builder(this);
switch(id){
case 0:
LayoutInflater factory = LayoutInflater.from(this);
final View textEntryView = factory.inflate(R.layout.filedialog, null);
builder.setTitle("创建文件夹");
builder.setView(textEntryView);
builder.setPositiveButton("确定", new CreateDialog(textEntryView));
builder.setNegativeButton("取消", null);
break;
case 1:
LayoutInflater factory2 = LayoutInflater.from(this);
final View textEntryView2 = factory2.inflate(R.layout.filedialog, null);
builder.setTitle("重命名文件");
builder.setView(textEntryView2);
builder.setPositiveButton("确定", new RenameDialog(textEntryView2));
builder.setNegativeButton("取消", null);
break;
case 2:
builder.setTitle("你确定要删除吗？");
builder.setPositiveButton("确定", new DeleteDialog());
builder.setNegativeButton("取消", null);
break;
}
builder.create().show();
}
/**
* 根据路径删除指定的目录或文件，无论存在与否
*@param sPath 要删除的目录或文件
*@return 删除成功返回 true，否则返回 false。
*/
public boolean DeleteFolder(String sPath) {
flag = false;
File file = new File(sPath);
// 判断目录或文件是否存在
if (!file.exists()) { // 不存在返回 false
return flag;
} else {
// 判断是否为文件
if (file.isFile()) { // 为文件时调用删除文件方法
return deleteFile(sPath);
} else { // 为目录时调用删除目录方法
return deleteDirectory(sPath);
}
}
}
/**
* 删除单个文件
* @param sPath 被删除文件的文件名
* @return 单个文件删除成功返回true，否则返回false
*/
public boolean deleteFile(String sPath) {
flag = false;
File file = new File(sPath);
// 路径为文件且不为空则进行删除
if (file.isFile() && file.exists()) {
file.delete();
flag = true;
}
return flag;
}
/**
* 删除目录（文件夹）以及目录下的文件
* @param sPath 被删除目录的文件路径
* @return 目录删除成功返回true，否则返回false
*/
public boolean deleteDirectory(String sPath) {
//如果sPath不以文件分隔符结尾，自动添加文件分隔符
if (!sPath.endsWith(File.separator)) {
sPath = sPath + File.separator;
}
File dirFile = new File(sPath);
//如果dir对应的文件不存在，或者不是一个目录，则退出
if (!dirFile.exists() || !dirFile.isDirectory()) {
return false;
}
flag = true;
//删除文件夹下的所有文件(包括子目录)
File[] files = dirFile.listFiles();
for (int i = 0; i < files.length; i++) {
//删除子文件
if (files[i].isFile()) {
flag = deleteFile(files[i].getAbsolutePath());
if (!flag) break;
} //删除子目录
else {
flag = deleteDirectory(files[i].getAbsolutePath());
if (!flag) break;
}
}
if (!flag) return false;
//删除当前目录
if (dirFile.delete()) {
return true;
} else {
return false;
}
}
/**
* 文件刷新
* @param file
*/
private void fileScan(String file){
Uri data = Uri.parse("file://"+file);
sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, data));
}
/**
* 启动文件打开
* @param f
*/
private void openFile(File f) {
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(android.content.Intent.ACTION_VIEW);
// 获取文件媒体类型
String type = getMIMEType(f);
if(type==null)
return;
intent.setDataAndType(Uri.fromFile(f), type);
startActivity(intent);
}
/**
* 获取文件类型
* @param f
* @return
*/
private String getMIMEType(File f) {
String type = "";
String fileName = f.getName();
String end = fileName.substring(fileName.indexOf(".") + 1).toLowerCase();
// 判断文件类型
if(end.equals("wma") || end.equals("mp3") || end.equals("midi")||end.equals("ape")
|| end.equals("amr") || end.equals("ogg") || end.equals("wav")||end.equals("acc")) {
type = "audio";
} else if (end.equals("3gp") || end.equals("mp4")||end.equals("rmvb")||end.equals("flv")
||end.equals("avi")||end.equals("wmv")||end.equals("f4v")) {
type = "video";
} else if (end.equals("jpg") || end.equals("gif") || end.equals("png")
|| end.equals("jpeg") || end.equals("bmp")) {
type = "image";
} else {
Toast.makeText(getApplicationContext(), "not media file", Toast.LENGTH_LONG).show();
return null;
}
// MIME Type格式是"文件类型/文件扩展名"
type += "/*";
return type;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
menu.add(0, Menu.FIRST, 0, "creat file");
menu.add(0, Menu.FIRST+1, 0, "about other");
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case 1:
Mydialog(0);
break;
case 2:
Toast.makeText(this, "版权所有，盗版必究！", 500).show();
break;
}
return super.onOptionsItemSelected(item);
}
@Override
public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
AlertDialog.Builder builder=new AlertDialog.Builder(this);
String[] items={"rename file","delete file"};
builder.setItems(items, new LongDialog(arg2));
builder.create().show();
return true;
}
class CreateDialog implements DialogInterface.OnClickListener{
private View textEntryView;
public CreateDialog(View textEntryView) {
this.textEntryView = textEntryView;
}
@Override
public void onClick(DialogInterface dialog, int which) {
EditText userName = (EditText) textEntryView.findViewById(R.id.fname);
String fn=userName.getText().toString().trim();
if(!TextUtils.isEmpty(fn)){
File f=new File(backFile,fn);
if(f.exists()){
Toast.makeText(FileActivity.this, "file has exist", 500).show();
}else{
Toast.makeText(FileActivity.this, "file creat "+f.mkdir(), 500).show();
listDir(f.getAbsolutePath());
//fileScan(f.getAbsolutePath());
adapter.notifyDataSetChanged();
}
}
}
}
class RenameDialog implements DialogInterface.OnClickListener{
private View textEntryView2;
public RenameDialog(View textEntryView2) {
this.textEntryView2 = textEntryView2;
}
@Override
public void onClick(DialogInterface dialog, int which) {
EditText userName = (EditText) textEntryView2.findViewById(R.id.fname);
String fn=userName.getText().toString().trim();
if(!TextUtils.isEmpty(fn)){
File old=new File(currentPath);
File f=new File(backFile.getAbsolutePath(),fn);
if(f.exists()){
Toast.makeText(FileActivity.this, "file has exist", 500).show();
}else{
Toast.makeText(FileActivity.this, "file rename "+old.renameTo(f), 500).show();
listDir(f.getAbsolutePath());
//fileScan(f.getAbsolutePath());
adapter.notifyDataSetChanged();
}
}
}
}
class DeleteDialog implements DialogInterface.OnClickListener{
@Override
public void onClick(DialogInterface dialog, int which) {
File f=new File(currentPath);
if(f.exists()){
DeleteFolder(f.getAbsolutePath());
listDir(f.getParent());
// fileScan(f.getAbsolutePath());
adapter.notifyDataSetChanged();
}
else
Toast.makeText(FileActivity.this, "file not exist", 500).show();
}
}
/**
* 文件操作选择
* @author Administrator
*
*/
class LongDialog implements DialogInterface.OnClickListener{
private int pos=0;
public LongDialog(int pos){
this.pos=pos;
}
@Override
public void onClick(DialogInterface dialog, int which) {
switch(which){
case 0:
currentPath = (String) items.get(pos).get("path");
Mydialog(1);
break;
case 1:
currentPath = (String) items.get(pos).get("path");
Mydialog(2);
break;
}
}
}
}
布局文件files.xm文件l：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/filelist" />
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/vw1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView android:id="@+id/img"
android:layout_width="32dip"
android:layout_margin="4dip"
android:layout_height="32dip"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView android:id="@+id/name"
android:textSize="18sp"
android:textStyle="bold"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<TextView android:id="@+id/desc"
android:textSize="14sp"
android:layout_width="fill_parent"
android:paddingLeft="10dip"
android:layout_height="wrap_content"/>
</LinearLayout>
</LinearLayout>
对了，最后别忘了加权限，要不可会报错的
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
以上都是在sd卡上的操作，不适用系统文件管理。
基于文件管理相关操作还可以使用第三方提供的.jar包操作
例如：apache的commons的FileUtils类就是这样一个工具类，使用它能大大的简化我们对文件的操作。
1.下载jar 地址：http://commons.apache.org/proper/commons-io/download_io.cgi
2.把commons-io-2.4.jar 这个文件导入到你的项目中
相关文章：http://snkcxy.iteye.com/blog/1845862