我替换了活动中的片段,并且在我的片段中需要一个 CoordinatorLayout
。
以下是我的代码:
CoordinatorActivity
类:
public class CoordinatorActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_coordinator);
Fragment newFragment = new FragmentCoordinator();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.fr_main, newFragment);
transaction.addToBackStack(null);
transaction.commit();
}
}
activity_coordinator.xml
文件:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/fr_main"
tools:context="com.app.hoatv.CoordinatorActivity">
</FrameLayout>
FragmentCoordinator
类:
public class FragmentCoordinator extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_coordinator, container, false);
}
}
fragment_coordinator.xml
文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.app.hoatv.CoordinatorActivity">
<android.support.design.widget.CoordinatorLayout
android:layout_height="match_parent"
android:layout_width="match_parent">
<android.support.design.widget.AppBarLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
app:elevation="0dp"
android:fitsSystemWindows="true"
android:theme="@style/AppTheme">
<include layout="@layout/layout_group_header"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:layout_height="match_parent"
android:layout_width="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:fillViewport="true">
<android.support.v7.widget.AppCompatTextView
android:layout_height="1000dp"
android:layout_width="match_parent"
android:text="@string/lorem"
android:background="@color/colorAccent"
android:id="@+id/container"/>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
</LinearLayout>
layout_group_header.xml
:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#a70000">
</LinearLayout>
但当我滚动NestedScrollView
时,layout_group_header.xml
不会显示或隐藏。它总是显示在我的片段屏幕上。
我的代码出了什么问题? 我该如何修复它?