background
The above problem emerged: Official Documents
solve:
My problem is that the activity is destroyed, and the result is a crash caused by the Dialog popping up, which is handled asynchronously.
if(isFinishing()){
// 在异步情况下，如果activity销毁后再弹dialog 会导致异常，故如果正在销毁就不要弹出dialog
return;
}