Android Studio Compilation Error: 'PERMISSION_REQUEST_CODE' Not Found

The compilation failed because the variable 'PERMISSION_REQUEST_CODE' could not be found.

To resolve this issue, you need to declare the 'PERMISSION_REQUEST_CODE' variable in your 'MainActivity' class. You can do this by adding the following line of code at the top of your 'MainActivity' class:

private static final int PERMISSION_REQUEST_CODE = 1;

Make sure to replace '1' with the appropriate value for your use case.

After adding the variable declaration, clean and rebuild your project. This should resolve the compilation errors.