如何从Java类内部的函数访问主类对象？

请阅读以下代码中的2条注释。

public class Field extends LinearLayout {
    public void init() {
        setOnFocusChangeListener(new OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {

                // I want to access the main object 'Field' here(not the class, the object)
            }
        });

    // to be clear the object referred as 'this' from HERE should be accessed from where the above comment is.
    }
}

这可能吗？是否有关键字可以从对象内部的函数访问主类对象？