在片段视图之间切换 [英] Switching between Fragment view

问题描述

在xml布局文件中声明片段的标准方法是

The standard way to declare fragments in a xml layout file is

<LinearLayout ...> 
    <fragment class="com.example.SomeFragment"
</LinearLayout>

其中 SomeFragment 是一个像

where SomeFragment is a java class defined like

class SomeFragment extends Fragment { 
    ... 
}

比方说，我有 3 个片段；片段 1、片段 2 和片段 3.当用户启动应用程序时，我向他们展示 fragment1，当他们点击按钮时，我将 fragment1 替换为 fragment2，等等.

Lets say, I have 3 fragments; fragment1, fragment2, and fragment3. When the user launches the app, I show them fragment1, and when they click on a button, I replace the fragment1 with fragment2, etc.

在单个布局 xml 文件中定义 3 个片段的最佳方法是什么?

What is the best approach to define the 3 fragments in a single layout xml file?

推荐答案

你应该为此使用 FrameLayout，这样你就不必在 XML 中指定片段类，这样它就不仅限于一个类.

You should use a FrameLayout for that, that way you don't have to specify the fragment class in the XML and that way it is not limited to one class.

<FrameLayout 
    android:id="@+id/contentFragment"
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:layout_weight="1" />

然后你可以像这样在代码中设置片段

and than you can set the fragment in the code like this

Fragment fragment = new YourFragment();

FragmentManager fm = getSupportFragmentManager();
FragmentTransaction transaction = fm.beginTransaction();
transaction.replace(R.id.contentFragment, fragment);
transaction.commit();

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