（原）Eclipse的java中文件读写

1 在<uses-sdk…/>下面添加permission

<uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="16" />
 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

2 在onCreate函数的下面添加如下代码：

    //写SD中的文件
    public void writeFileSdcardFile(String fileName,byte [] bytes) throws IOException
    {   
        try
        {   
            FileOutputStream fout = new FileOutputStream(fileName);   
            fout.write(bytes);   
            fout.close();   
        }  
        catch(Exception e)
        {   
            e.printStackTrace();   
        }   
    }   
                  
    //读SD中的文件   
    public void readFileSdcardFile(String fileName, byte [] bytes) throws IOException
    {    
        try
        {   
            FileInputStream fin = new FileInputStream(fileName);   
            fin.read(bytes);       
            fin.close();       
        }   
        catch(Exception e)
        {   
            e.printStackTrace();   
        }      
    }

3 调用处：

        byte [] buffer = new byte[width*height];   

        try  //读文件
        {
            readFileSdcardFile("/mnt/sdcard/2.raw", buffer);
        } 
        catch (IOException e) 
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    
        //your program...
     
        byte[] arraydst2 = new byte [width*height];
        try  //写文件
        {
            writeFileSdcardFile("/mnt/sdcard/2out.raw",arraydst2);
        } 
        catch (IOException e) 
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

4 主要参考：

http://blog.csdn.net/ztp800201/article/details/7322110