[Android] Enable and disable GPRS

/*** To set the data usage status, you need to sign the system according to the change * @ Param true: available, false: unavailable * @ return 0: Success-1: Failed */private int setmobiledataenabled (context context, boolean flag) {connectivitymanager CM = (connectivitymanager) context. getsystemservice (context. connectivity_service); Method setmobiledataenabl; try {setmobiledataenabl = cm. getclass (). getdeclaredmethod ("setmobiledataenabled", Boolean. class); setmobiledataenabl. invoke (CM, flag); Return 0;} catch (exception e) {e. printstacktrace (); Return-1 ;}}

AsCodeNote that the system permission is required to perform this operation.

In addition, this code does not seem to be able to run and run on a virtual machine. Running on a virtual machine will result in the situation where the GPRS switch is disabled and the 3G traffic signal is no longer displayed, but the browser can still be used to access the Internet. Later, I manually disabled the GPRS switch and can continue to access the Internet ...... It should be Google's little tricks to help developers ......