Question

我是android新手。我想用代码替换片段。这是我的代码。 MainActivity：

public class MainActivity extends FragmentActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

   setDefaultFragement();
}
private void setDefaultFragement() {
    ContentFragment fragment = new ContentFragment();
    FragmentManager manager = getSupportFragmentManager();
    manager.beginTransaction().replace(R.id.fra_content,fragment).commit();
}
}

这是我的ContentFragment

public class ContentFragment extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    return inflater.inflate(R.layout.fragment_content, container, false);
}
}

mylayout：

  <fragment
    android:id="@+id/fra_content"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_below="@id/fra_title"
    />

但是我收到了这些错误

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.administrator.myapplication/com.example.administrator.myapplication.MainActivity}: android.view.InflateException: Binary XML file line #13: Error inflating class fragmet

Answer 1

不要在xml中使用“fragment”，而是使用FrameLayout。如果您希望在xml中使用片段，则必须指定它，因此不需要片段管理器。

所以，在你的xml中

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_below="@id/toolbar"
    android:id="@+id/content"/>

在您的活动中：

FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.setCustomAnimations(enterAnimation, exitAnimation);
ft.replace(R.id.content, new ContentFragment());
ft.commit();

在你的片段中：

public class ContentFragment extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_content, container, false);
    return rootView;
 }
}

Answer 2

替换setDefaultFragement功能

private void setDefaultFragement() {
        ContentFragment fragment = new ContentFragment();
        FragmentManager manager = getSupportFragmentManager();
        manager.beginTransaction().replace(android.R.id.content,fragment).commit();
    }

当我替换片段时错误膨胀类片段

2 个答案: