Application program Activity starting method and device

The invention provides an application program Activity starting method and device. The application program Activity starting method comprises the steps that when the operation of starting any Activity of any application program is monitored, a starting mode which the Activity belongs to is judged; if it is determined that the Activity belongs to a non-default starting mode, whether a to-be-started Activity same as the Activity exists in a corresponding task stack or not is looked up based on the non-default starting mode; if the to-be-started Activity exists in the corresponding task stack, processing corresponding to the starting mode which the to-be-started Activity belongs to is conducted on the to-be-started Activity; the processed Activity is started through an Android system. By adopting the technical scheme, crossing process access failure and collapse of the Android system caused by too big space-occupying data volume are not caused, and the stability of the Android system accessing space-occupying da