Android app and Data Backup

1. You must have root permission and SD card write permission.

2. Back up the app itself

// Reference: http://blog.csdn.net/KPRF2009/article/details/8277996

Private void backupapp (string packagename) throws ioexception {file in = new file ("/data/APP/" + packagename + ". APK "); file out = new file ("/sdcard/backupapp/"+ packagename + ". APK "); out. createnewfile (); fileinputstream FCM = new fileinputstream (in); fileoutputstream Fos = new fileoutputstream (out); int count; byte [] buffer = new byte [256*1024]; while (COUNT = FCM. read (buffer)> 0) {FOS. write (buffer, 0, count);} FD. close (); FOS. flush (); FOS. close ();}

3. Back up data:

New file ("/data/" + packagename );

Recursively Save the data in the folder to the corresponding SD card folder.