android - Avoid SecurityException because of "No active admin owned by" -


how avoid exception

e/androidruntime(26113): caused by: java.lang.securityexception: no active admin owned uid xxxx policy #3

when calling this:

public static void lockscreen(context context) {     log.d(tag, "lockscreen");     componentname mdeviceadminsample = null;     devicepolicymanager dpm = (devicepolicymanager) context.getsystemservice(context.device_policy_service);     intent intent = new intent(devicepolicymanager.action_add_device_admin);     intent.putextra(devicepolicymanager.extra_device_admin, mdeviceadminsample);     dpm.locknow(); }

you have install , enable device administrator described in reference docs: http://developer.android.com/guide/topics/admin/device-admin.html


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