（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：

 1     //写SD中的文件

 2     public void writeFileSdcardFile(String fileName,byte [] bytes) throws IOException

 3     {   

 4         try

 5         {   

 6             FileOutputStream fout = new FileOutputStream(fileName);   

 7             fout.write(bytes);   

 8             fout.close();   

 9         }  

10         catch(Exception e)

11         {   

12             e.printStackTrace();   

13         }   

14     }   

15                   

16     //读SD中的文件   

17     public void readFileSdcardFile(String fileName, byte [] bytes) throws IOException

18     {    

19         try

20         {   

21             FileInputStream fin = new FileInputStream(fileName);   

22             fin.read(bytes);       

23             fin.close();       

24         }   

25         catch(Exception e)

26         {   

27             e.printStackTrace();   

28         }      

29     }

3 调用处：

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

 2 

 3         try  //读文件

 4         {

 5             readFileSdcardFile("/mnt/sdcard/2.raw", buffer);

 6         } 

 7         catch (IOException e) 

 8         {

 9             // TODO Auto-generated catch block

10             e.printStackTrace();

11         }

12     

13         //your program...

14      

15         byte[] arraydst2 = new byte [width*height];

16         try  //写文件

17         {

18             writeFileSdcardFile("/mnt/sdcard/2out.raw",arraydst2);

19         } 

20         catch (IOException e) 

21         {

22             // TODO Auto-generated catch block

23             e.printStackTrace();

24         }

 

4 主要参考：

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