filemanager.java

7个Android应用程序源代码

package com.yarin.android.FileManager;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import android.app.AlertDialog;
import android.app.ListActivity;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnClickListener;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;

public class FileManager extends ListActivity
{
	private List<IconifiedText>	directoryEntries = new ArrayList<IconifiedText>();
	private File				currentDirectory = new File("/");
	private File 				myTmpFile 		 = null;
	private int 				myTmpOpt		 = -1;

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle icicle)
	{
		super.onCreate(icicle);
		browseToRoot();
		this.setSelection(0);
	}
	//浏览文件系统的根目录
	private void browseToRoot() 
	{
		browseTo(new File("/"));
    }
	//返回上一级目录
	private void upOneLevel()
	{
		if(this.currentDirectory.getParent() != null)
			this.browseTo(this.currentDirectory.getParentFile());
	}
	//浏览指定的目录,如果是文件则进行打开操作
	private void browseTo(final File file)
	{
		this.setTitle(file.getAbsolutePath());
		if (file.isDirectory())
		{
			this.currentDirectory = file;
			fill(file.listFiles());
		}
		else
		{
			fileOptMenu(file);
		}
	}
	//打开指定文件
	protected void openFile(File aFile)
	{
		Intent intent = new Intent();
		intent.setAction(android.content.Intent.ACTION_VIEW);
		File file = new File(aFile.getAbsolutePath());
		// 取得文件名
		String fileName = file.getName();
		// 根据不同的文件类型来打开文件
		if (checkEndsWithInStringArray(fileName, getResources().getStringArray(R.array.fileEndingImage)))
		{
			intent.setDataAndType(Uri.fromFile(file), "image/*");
		}
		else if (checkEndsWithInStringArray(fileName, getResources().getStringArray(R.array.fileEndingAudio)))
		{
			intent.setDataAndType(Uri.fromFile(file), "audio/*");
		}
		else if (checkEndsWithInStringArray(fileName, getResources().getStringArray(R.array.fileEndingVideo)))
		{
			intent.setDataAndType(Uri.fromFile(file), "video/*");
		}
		startActivity(intent);
	}
	//这里可以理解为设置ListActivity的源
	private void fill(File[] files)
	{
		//清空列表
		this.directoryEntries.clear();

		//添加一个当前目录的选项
		this.directoryEntries.add(new IconifiedText(getString(R.string.current_dir), getResources().getDrawable(R.drawable.folder)));
		//如果不是根目录则添加上一级目录项
		if (this.currentDirectory.getParent() != null)
			this.directoryEntries.add(new IconifiedText(getString(R.string.up_one_level), getResources().getDrawable(R.drawable.uponelevel)));

		Drawable currentIcon = null;
		for (File currentFile : files)
		{
			//判断是一个文件夹还是一个文件
			if (currentFile.isDirectory())
			{
				currentIcon = getResources().getDrawable(R.drawable.folder);
			}
			else
			{
				//取得文件名
				String fileName = currentFile.getName();
				//根据文件名来判断文件类型，设置不同的图标
				if (checkEndsWithInStringArray(fileName, getResources().getStringArray(R.array.fileEndingImage)))
				{
					currentIcon = getResources().getDrawable(R.drawable.image);
				}
				else if (checkEndsWithInStringArray(fileName, getResources().getStringArray(R.array.fileEndingWebText)))
				{
					currentIcon = getResources().getDrawable(R.drawable.webtext);
				}
				else if (checkEndsWithInStringArray(fileName, getResources().getStringArray(R.array.fileEndingPackage)))
				{
					currentIcon = getResources().getDrawable(R.drawable.packed);
				}
				else if (checkEndsWithInStringArray(fileName, getResources().getStringArray(R.array.fileEndingAudio)))
				{
					currentIcon = getResources().getDrawable(R.drawable.audio);
				}
				else if (checkEndsWithInStringArray(fileName, getResources().getStringArray(R.array.fileEndingVideo)))
				{
					currentIcon = getResources().getDrawable(R.drawable.video);
				}
				else
				{
					currentIcon = getResources().getDrawable(R.drawable.text);
				}
			}
			//确保只显示文件名、不显示路径如：/sdcard/111.txt就只是显示111.txt
			int currentPathStringLenght = this.currentDirectory.getAbsolutePath().length();
			this.directoryEntries.add(new IconifiedText(currentFile.getAbsolutePath().substring(currentPathStringLenght), currentIcon));
		}
		Collections.sort(this.directoryEntries);
		IconifiedTextListAdapter itla = new IconifiedTextListAdapter(this);
		//将表设置到ListAdapter中
		itla.setListItems(this.directoryEntries);
		//为ListActivity添加一个ListAdapter
		this.setListAdapter(itla);
	}
	
	protected void onListItemClick(ListView l, View v, int position, long id)
	{
		super.onListItemClick(l, v, position, id);
		// 取得选中的一项的文件名
		String selectedFileString = this.directoryEntries.get(position).getText();
		
		if (selectedFileString.equals(getString(R.string.current_dir)))
		{
			//如果选中的是刷新
			this.browseTo(this.currentDirectory);
		}
		else if (selectedFileString.equals(getString(R.string.up_one_level)))
		{
			//返回上一级目录
			this.upOneLevel();
		}
		else
		{
					
			File clickedFile = null;
			clickedFile = new File(this.currentDirectory.getAbsolutePath()+ this.directoryEntries.get(position).getText());
			if(clickedFile != null)
				this.browseTo(clickedFile);
		}
	}
	//通过文件名判断是什么类型的文件
	private boolean checkEndsWithInStringArray(String checkItsEnd, 
					String[] fileEndings)
	{
		for(String aEnd : fileEndings)
		{
			if(checkItsEnd.endsWith(aEnd))
				return true;
		}
		return false;
	}
	
	public boolean onCreateOptionsMenu(Menu menu)
	{
		super.onCreateOptionsMenu(menu);
		menu.add(0, 0, 0, "新建目录").setIcon(R.drawable.addfolderr);
		menu.add(0, 1, 0, "删除目录").setIcon(R.drawable.delete);
		menu.add(0, 2, 0, "粘贴文件").setIcon(R.drawable.paste);
		menu.add(0, 3, 0, "根目录").setIcon(R.drawable.goroot);
		menu.add(0, 4, 0, "上一级").setIcon(R.drawable.uponelevel);
		return true;
	}
	public boolean onOptionsItemSelected(MenuItem item)
	{
		super.onOptionsItemSelected(item);
		switch (item.getItemId())
		{
			case 0:
				Mynew();
				break;
			case 1:
				//注意：删除目录，谨慎操作，该例子提供了
				//deleteFile（删除文件）和deleteFolder（删除整个目录）
				MyDelete();
				break;
			case 2:
				MyPaste();
				break;
			case 3:
				this.browseToRoot();
				break;
			case 4:
				this.upOneLevel();
				break;
		}
		return false;
	}
	@Override
	public boolean onPrepareOptionsMenu(Menu menu)
	{
		return super.onPrepareOptionsMenu(menu);
	}
	//粘贴操作
	public void MyPaste()
	{
		if ( myTmpFile == null )
		{
			Builder builder = new Builder(FileManager.this);
			builder.setTitle("提示");
			builder.setMessage("没有复制或剪切操作");
			builder.setPositiveButton(android.R.string.ok,
					new AlertDialog.OnClickListener() {
						public void onClick(DialogInterface dialog, int which) {
							dialog.cancel();	
						}
					});
			builder.setCancelable(false);
			builder.create();
			builder.show();
		}
		else
		{
			if ( myTmpOpt == 0 )//复制操作
			{
				if(new File(GetCurDirectory()+"/"+myTmpFile.getName()).exists())
				{
					Builder builder = new Builder(FileManager.this);
					builder.setTitle("粘贴提示");
					builder.setMessage("该目录有相同的文件，是否需要覆盖？");
					builder.setPositiveButton(android.R.string.ok,
							new AlertDialog.OnClickListener() {
								public void onClick(DialogInterface dialog, int which) {
									copyFile(myTmpFile,new File(GetCurDirectory()+"/"+myTmpFile.getName()));
									browseTo(new File(GetCurDirectory()));
								}
							});
					builder.setNegativeButton(android.R.string.cancel,
							new DialogInterface.OnClickListener() {
								public void onClick(DialogInterface dialog, int which) {
									dialog.cancel();
								}
							});
					builder.setCancelable(false);
					builder.create();
					builder.show();
				}	
				else
				{
					copyFile(myTmpFile,new File(GetCurDirectory()+"/"+myTmpFile.getName()));
					browseTo(new File(GetCurDirectory()));
				}
			}
			else if(myTmpOpt == 1)//粘贴操作
			{
				if(new File(GetCurDirectory()+"/"+myTmpFile.getName()).exists())
				{
					Builder builder = new Builder(FileManager.this);
					builder.setTitle("粘贴提示");
					builder.setMessage("该目录有相同的文件，是否需要覆盖？");
					builder.setPositiveButton(android.R.string.ok,
							new AlertDialog.OnClickListener() {
								public void onClick(DialogInterface dialog, int which) {
									moveFile(myTmpFile.getAbsolutePath(),GetCurDirectory()+"/"+myTmpFile.getName());
									browseTo(new File(GetCurDirectory()));
								}
							});
					builder.setNegativeButton(android.R.string.cancel,
							new DialogInterface.OnClickListener() {
								public void onClick(DialogInterface dialog, int which) {
									dialog.cancel();
								}
							});
					builder.setCancelable(false);
					builder.create();
					builder.show();
				}	
				else
				{
					moveFile(myTmpFile.getAbsolutePath(),GetCurDirectory()+"/"+myTmpFile.getName());
					browseTo(new File(GetCurDirectory()));	
				}
			}
		}
	}
	//删除整个文件夹
	public void MyDelete()
	{
		//取得当前目录
		File tmp=new File(this.currentDirectory.getAbsolutePath());
		//跳到上一级目录
		this.upOneLevel();
		//删除取得的目录
		if ( deleteFolder(tmp) )
		{
			Builder builder = new Builder(FileManager.this);
			builder.setTitle("提示");
			builder.setMessage("删除成功");
			builder.setPositiveButton(android.R.string.ok,
					new AlertDialog.OnClickListener() {
						public void onClick(DialogInterface dialog, int which) {
							dialog.cancel();	
						}
					});
			builder.setCancelable(false);
			builder.create();
			builder.show();
		}
		else 
		{
			Builder builder = new Builder(FileManager.this);
			builder.setTitle("提示");
			builder.setMessage("删除失败");
			builder.setPositiveButton(android.R.string.ok,
					new AlertDialog.OnClickListener() {
						public void onClick(DialogInterface dialog, int which) {
							dialog.cancel();
						}
					});
			builder.setCancelable(false);
			builder.create();
			builder.show();
		}
		this.browseTo(this.currentDirectory);	
	}
	//新建文件夹
	public void Mynew()
	{
		final LayoutInflater factory = LayoutInflater.from(FileManager.this);
		final View dialogview = factory.inflate(R.layout.dialog, null);
		//设置TextView
		((TextView) dialogview.findViewById(R.id.TextView_PROM)).setText("请输入新建文件夹的名称！");
		//设置EditText
		((EditText) dialogview.findViewById(R.id.EditText_PROM)).setText("文件夹名称...");
		
		Builder builder = new Builder(FileManager.this);
		builder.setTitle("新建文件夹");