环境：
①IDEA2019.3.3
②JAVA12
③Android-SDK29.0.3
④Flutter1.14.6
⑤WINDOWS10.0.18363.657
⑥AL10实体机，Android8
问题一：Manager AVDt升级提示
解决办法：JAVA由12调整为8
问题二:Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses
解决办法：运行E:\App\flutterSDK\flutter>flutter doctor --android-licenses，全部回答y
问题三: No devices available
解决办法:flutter config --android-sdk E:\App\AndroidSDK(本机android sdk路径)