Flutter compilation fails

1,Error: The method 'getNativeImage' isn't defined for the class 'PaintingBinding'. - 'PaintingBinding' is from 'package:flutter/src/painting/binding.dart'

  This is a third-party package reference flutter Class methods of engine , Switch flutter Engine version is ok . And then in AndroidStudio Configuration in configuration Flutter Of SDk route , Check Dart Is the path corresponding .

2,Gradle build failed to produce an .apk file. It's likely that this file was generated under <app_root>\build, but the tool couldn't find it

  This is generation apk Compile time error , as a result of 1：build flavor No package name for .   2,gradle Of sdk 28 Change to 27 .   3,gradle Change the package name of to lowercase .  4, There is a problem with the compilation environment ,flutter clean And put Android The generated garbage files of have been deleted . again build

3,git Download is slow .ERROR: RPC FAILED; CURL 56 LIBRESSL SSL_READ: SSL_ERROR_SYSCALL, ERRNO 54 

Check flutter Environment   1,path Is there a mirror .   2, Project clean up flutter clean Android Delete the junk file .   3,vpn Of SDN Reset , Repair . 

4,TextEditingController Can't change TextEditingController The content of , It could be yours TextEditingController The writing position is wrong , It should be instantiated once . If in stf In the document , Then don't directly text Assign the initial value , use value assignment . use clean Empty .