Data processing method for portable device

The invention provides a data processing method for a portable device. The method comprises: uncompressing an application installation package file to obtain a byte code file and a Manifest file; extracting all API calls in a program by traversing the byte code file, and analyzing corresponding rights required in APIs; modifying rights required by the Manifest file, and deleting rights which are requested but not used; and re-integrating the Manifest file subjected to right modification and the byte code file into an installation package file. According to the data processing method for the portable device, provided by the invention, the right of the application program is analyzed and constrained, so that the security and reliability of the program are improved and the correct operation of the program is not influenced.