(original) file read and write in Java of Eclipse

1 Add permission below <uses-sdk.../>

<uses-SDK        android:minsdkversion= "        android:targetsdkversion" = "/>" < Uses-permission android:name= "Android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name= " Android.permission.MOUNT_UNMOUNT_FILESYSTEMS "/>

2 Add the following code below the OnCreate function:

1     //write files in SD2      Public voidWritefilesdcardfile (String FileName,byte[] bytes)throwsIOException3     {   4         Try5         {   6FileOutputStream Fout =NewFileOutputStream (fileName); 7 fout.write (bytes); 8 Fout.close (); 9         }  Ten         Catch(Exception e) One         {    A E.printstacktrace ();  -         }    -     }    the                    -     //read the files in SD -      Public voidReadfilesdcardfile (String FileName,byte[] bytes)throwsIOException -     {     +         Try -         {    +FileInputStream fin =NewFileInputStream (fileName);  A fin.read (bytes);  at Fin.close ();  -         }    -         Catch(Exception e) -         {    - E.printstacktrace ();  -         }       in}

3 Call Place:

1         byte[] buffer =New byte[width*height]; 2 3         Try  //Read the file4         {5Readfilesdcardfile ("/mnt/sdcard/2.raw", buffer);6         } 7         Catch(IOException e)8         {9             //TODO auto-generated Catch blockTen e.printstacktrace (); One         } A      -         //Your program ... -       the         byte[] Arraydst2 =New byte[width*height]; -         Try  //Write a file -         { -Writefilesdcardfile ("/mnt/sdcard/2out.raw", arraydst2); +         }  -         Catch(IOException e) +         { A             //TODO auto-generated Catch block at e.printstacktrace (); -}

4 Main references:

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

(original) file read and write in Java of Eclipse