I. Error reporting content:
(Sometimes 49 mistakes, then 19 again. Here’s the last one each time.)

UnityEditor. BuildPlayerWindow + BuildMethodException: 19 errors at UnityEditor. BuildPlayerWindow + DefaultBuildMethods. BuildPlayer (UnityEditor. BuildPlayerOptions options) in x00242 [0]
D:\unity\Editor\Mono\BuildPlayerWindowBuildMethods.cs:190
The at UnityEditor. BuildPlayerWindow. CallBuildMethods (System. Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x0007f] in D:\unity\Editor\Mono\BuildPlayerWindowBuildMethods.cs:95
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

(There is also an error message that differs from other error messages,Gradle is a Unity packaging related tool)

CommandInvokationFailure: Gradle build failed.

 
Two. Solutions
The following four methods are all found by querying the data:
(None of the four approaches successfully solved my problem, but a similar BuildPlayerWindow+BuildMethodException error might occur if you don’t follow these Settings, where the number of errors might be different):

Method 1: File-buildsetting-PlayerSetting-Player-otherSettings-AndroidTVCompatibility disabled (Individual tried not to work)
Method 2: The release path cannot include Chinese, the path cannot be in the project, try to change the path, the release directory is placed in the same level directory as the project (individual tried, but it does not work)
Method 3: File-buildsettings-PlayerSetting-API Compatibility Level Choose Net 2.0(personal try does not work)
Step 4: Remove the plugins folder from the project’s “Assets” folder. I left a plugins/ vscode.cs in my project (I tried it personally but it didn’t work)

Tips for personal success:

Method 5: The name of the file-buildsetting-playersetting-player-productname is the same as the apK name after the file-buildsetting-build (my problem is that I try to change the following to send the package normally)

 
Three. I refer to the UNITY of the android package transmission gate configuration tutorial: https://blog.csdn.net/ChinarCSDN/article/details/79513403
There is also a portal for the error reporting solution of the great God, but I tried that my error reporting was not for this reason, so I failed to solve it.
The software version I used was different, because the time interval was long, so I used JDK-Java SE 8U231 version and SDK-3.5.2 version.