是否可以在不同的类中初始化浮动操作按钮，并从另一个类中调用它？

FloatingActionButton fab = findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        // 处理浮动操作按钮的点击事件
    }
});

public class SecondActivity extends AppCompatActivity {
    private MainActivity mainActivity;

    public void setMainActivity(MainActivity mainActivity) {
        this.mainActivity = mainActivity;
    }

    public void callFloatingActionButton() {
        if (mainActivity != null) {
            FloatingActionButton fab = mainActivity.findViewById(R.id.fab);
            // 对浮动操作按钮进行操作
        }
    }
}

SecondActivity secondActivity = new SecondActivity();
secondActivity.setMainActivity(this);

secondActivity.callFloatingActionButton();