7.x→8.0 startService ↓ startForegroundService TYPE_PHONE TYPE_PRIORITY_PHONE TYPE_SYSTEM_ALERT TYPE_SYSTEM_OVERLAY TYPE_SYSTEM_ERROR ↓ TYPE_APPLICATION_OVERLAY startForegroundは5秒以内に呼び出す。 これだけですね。TYPE_PHONEとかTYPE_SYSTEM_ALERTとかが全部TYPE_APPLICATION_OVERLAYになるんで上手く動く…
