public interface WarningListener {
        void onWarning(String message);
    }


    public static void inputData(WarningListener listener) throws IOException {
        
        if(listener != null){
            listener.onWarning(secondOutput+"");
        }
    }



activity或fragment中调用
class.inputData(new class.WarningListener() {
                @Override
                public void onWarning(@NonNull String message) {
                    runOnUiThread(() -> txt_msg.append(message + "\n"));
                }
            });