Android SD卡 文件或目录浏览、拷贝、复制、粘贴
在使用ES文件浏览器的时候，当浏览SD卡下的文件或者其他地方的文件时，如果长按某一项文件或某一目录时会有"剪切"、"复制"、"重命名"、"删除" 等操作。于是乎自己也想弄一个类似与ES文件浏览器上面的拷贝复制功能。至于做一个类似ES文件浏览器 一样的软件，也是可以做的。
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需要给 AndroidManifest.xml里加上权限：
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>?
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
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package com.copy.file;/**?* @author wainiwann?* Android SD卡文件目录拷贝操作?* ?*/import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.Toast;?public class Copy_File extends Activity {????private Button m_btn = null; ????private final static String FROMPATH = "/mnt/sdcard/A/";????private final static String TOPATH = "/mnt/sdcard/B/";?????/** Called when the activity is first created. */????@Override????public void onCreate(Bundle savedInstanceState) ????{????????super.onCreate(savedInstanceState);????????setContentView(R.layout.main);????????m_btn = (Button)findViewById(R.id.button1);????????m_btn.setOnClickListener(new OnClickListener()????????{?????????????@Override????????????public void onClick(View v) ????????????{????????????????// TODO Auto-generated method stub????????????????if(copy(FROMPATH, TOPATH)==0)????????????????{????????????????????Toast.makeText(Copy_File.this,"文件拷贝成功！！！",20000).show();????????????????}else????????????????{????????????????????Toast.makeText(Copy_File.this,"文件拷贝失败！！！",20000).show();????????????????}????????????}?????????????????????????});????}?????????public int copy(String fromFile, String toFile)????{????????//要复制的文件目录????????File[] currentFiles;????????File root = new File(fromFile);????????//如同判断SD卡是否存在或者文件是否存在????????//如果不存在则 return出去????????if(!root.exists())????????{????????????return -1;????????}????????//如果存在则获取当前目录下的全部文件 填充数组????????currentFiles = root.listFiles();?????????????????//目标目录????????File targetDir = new File(toFile);????????//创建目录????????if(!targetDir.exists())????????{????????????targetDir.mkdirs();????????}????????//遍历要复制该目录下的全部文件????????for(int i= 0;i<currentFiles.length;i++)????????{????????????if(currentFiles[i].isDirectory())//如果当前项为子目录 进行递归????????????{????????????????copy(currentFiles[i].getPath() + "/", toFile + currentFiles[i].getName() + "/");?????????????????????????????}else//如果当前项为文件则进行文件拷贝????????????{????????????????CopySdcardFile(currentFiles[i].getPath(), toFile + currentFiles[i].getName());????????????}????????}????????return 0;????}????????????//文件拷贝????//要复制的目录下的所有非子目录(文件夹)文件拷贝????public int CopySdcardFile(String fromFile, String toFile)????{?????????????????try????????{????????????InputStream fosfrom = new FileInputStream(fromFile);????????????OutputStream fosto = new FileOutputStream(toFile);????????????byte bt[] = new byte[1024];????????????int c;????????????while ((c = fosfrom.read(bt)) > 0) ????????????{????????????????fosto.write(bt, 0, c);????????????}????????????fosfrom.close();????????????fosto.close();????????????return 0;?????????????????????} catch (Exception ex) ????????{????????????return -1;????????}????}??????}?下次在写个文件浏览器，然后在获取某一项的长按事件，然后弹出一个Dialog实现文件操作。