toggle between android layout editor "Text" and android layout editor "Design"

here is "Text" and "Design"

I find

FileEditorManager.getInstance(myProject).getAllEditors() 

can get AndroidDesignerEditor and FileEditor, so question become "how to focus editor component"

here is my solution:

//pj is myProject
FileEditorManagerImpl fem = FileEditorManager.getInstance(pj)

VirtualFile vf = getVirtualFile("/home/roroco/Dropbox/try/adr/try/app/src/main/res/layout/content_main.xml")

FileEditor[] fes = fem.getAllEditors(vf)
if (fes.any { it instanceof AndroidDesignerEditor }) {
    FileEditor fe = fem.getSelectedEditor(vf)
    if (fe instanceof AndroidDesignerEditor) {
        fem.setSelectedEditor(vf, TextEditorProvider.TYPE_ID)
    } else {
        fem.setSelectedEditor(vf, AndroidDesignerEditorProvider.ANDROID_DESIGNER_ID)
    }
}