单击按钮时编辑操作栏的标题

Question

当我点击按钮

时，如何编辑我的actionBar标题

getSupportActionBar().setTitle("dummy title"); // this is working

button.setOnClickListener(v->{
            Log.d("TAG", "click"); // this is working
            getSupportActionBar().setTitle(title); // not working
            setTitle(title); // not working
            mToolbar.setTitle(title); // not working
        });

如果有人能告诉我我做错了什么，那就太棒了