（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