Beginner bug set

1. There should not be myself\tools\flutter\bin\cache.
solve ： The flutter Change the file to a path with low permission , For example, put it directly into C Underneath , Instead of putting C:(calin)myself\tools below
2.windows terminal cmd Chinese command flutter docter The error is as follows ：

Because flutter_tools depends on test any which doesn't exist (could not find package test at https://storage.flutter-io.cn), version solving failed. pub get failed (server unavailable) -- attempting retry 1 in 1 second...

reason ： The step of using image is wrong , The environment variable address is not set correctly
3.
Pictured ： There is no equipment to choose from where the circle is drawn

reason ： Variables are not configured
solve ： Set abd environment variable , Change a simulator
4. Prompt error ： You cannot use multiple simulators , solve ： Delete those .lock file
5. Click on the function without documentation , In settings , Set up a presentation
6. Unable to jump to the source code by clicking the function , solve ： Hold down ctrl, Then click the function to jump
7. Prompt error ： Prompt error , Can't find souser.file file
Combining links https://stackoverflow.com/questions/64372383/ndk-at-library-android-sdk-ndk-bundle-did-not-have-a-source-properties-file The first answer , Be careful build.gradle There are two files in the directory .

bug Too much to write .

Be careful ：
1.Androidstudio Installing many things may fail , Because he has to install many foreign things
2. After resetting the environment variables , No need to reboot , But close the previous cmd terminal , Only the reopened terminal is valid
3. While downloading , You can see the destination file of the destination , But it doesn't mean that the download is over .