我创建了以下类:publicclassAsyncHttpsClientHelper{publicstaticfinalintREMOVE_CREDIT_CARD=1;publicstaticfinalintENABLE_AUTORENEW=2;//+10finalints...privatestaticAsyncHttpsClientHelperinstance=null;privatestaticActivityactivity;//SomeothervariablesprivateAsyncHttpsClientHelper(Contextcontext){//Initiateva