The project setup logic for Android Studio is very different from eclipse, and the action performed is File->setting->file encodings then set:
Opening the module's Build.gradle file modifies the encoding used by the compiler and, through the above settings, only affects the encoding of the contents of the file you see in the editor view inside the IDE. The encoding used by the compiler also needs to be set separately, otherwise the Gradle default using UTF-8 encoding and the actual encoding of the file is inconsistent, it will cause the program to run when the display garbled.
The Gradle configuration encoding is configured in the Build.gradle script file. Add the following configuration on the line.
Android {... compileoptions {encoding "GBK"}}
If you only set the encoding for a file, open the file directly in Android Studio, and right-click it to the option of the file encoding.
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Android Studio Setup Project module encoding to troubleshoot problems with garbled Android Studio Project runtime