将工具栏与片段一起使用

问题描述

我正在尝试创建一个viewpager，它可以通过3个不同的片段滑动，每个片段都有一个不同的工具栏.我之前已经在一个活动中实现了新工具栏，并且可以使用它，但是我正在尝试使其与片段一起使用

I am trying to create a viewpager that swipes through 3 different fragments each with a different toolbar. I have implemented the new toolbar in an activity before and got it to work however I am trying to get it to work with fragments

这是片段代码

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    // Inflate the layout resource that'll be returned
    View rootView = inflater.inflate(R.layout.fragment_home, container, false);


    mToolbar = (Toolbar) rootView.findViewById(R.id.toolbar_home);
    if (mToolbar != null) {
        setSupportActionBar(mToolbar);
    }
    mToolbar.setTitle(null);

    return rootView;
}

我正在用Fragment扩展片段，但是出现错误

I am extending my fragment with Fragment, however I am getting the error

Cannot resolve method setSupportActionBar

我不确定如何解决此问题，如果删除setSupportActionBar代码，它将停止在某些设备上运行吗?

I am not sure how to resolve this, if I remove the setSupportActionBar code will it stop working with certain devices?

推荐答案

片段没有这样的方法setSupportActionBar(). ActionBar是Activity的属性，因此要将工具栏设置为actionBar，您的活动应从ActionBarActivity扩展，然后可以调用Fragment:

Fragments don't have such method setSupportActionBar(). ActionBar is a property of Activity, so to set your toolbar as the actionBar, your activity should extend from ActionBarActivity and then you can call in your Fragment:

 ((ActionBarActivity)getActivity()).setSupportActionBar(mToolbar);

更新

如果您使用的是 AppCompatActivity :

 ((AppCompatActivity)getActivity()).setSupportActionBar(mToolbar);

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