我正在尝试用homescreen片段替换一个displaynews片段,但片段正在添加而不是替换在这里的代码
content_main.xml
manyReqsWrapper(args).then((res) => {
//success handler
}).catch((err) => {
//error handler
});
mainacitivity.class
<?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:id="@+id/content_main"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.ajitesh.newson.MainActivity"
tools:showIn="@layout/app_bar_main">
<fragment
android:id="@+id/home_fragment"
android:name="com.ajitesh.newson.DisplayNews"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
displaynews.class
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fragmentClass=HomeScreen.class;
try {
fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
// Insert the fragment by replacing any existing fragment
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.home_fragment,fragment).commit();
displaynews.xml
public class DisplayNews extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.displaynews, container, false);
}
}
HomeScreen.class
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="wrap_content"
android:id="@+id/display_news"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="helllooooo"/>
</LinearLayout>
home_screen.xml
public class HomeScreen extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.home_screen, container, false);
}
}
答案 0 :(得分:1)
如果在xml中进行硬编码,则无法替换碎片,您应该动态添加碎片以将碎片替换为另一个碎片。
// Create new fragment and transaction
Fragment newFragment = new ExampleFragment();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
// Replace whatever is in the fragment_container view with this fragment,
// and add the transaction to the back stack if needed
transaction.replace(R.id.fragment_container, newFragment);
transaction.addToBackStack(null);
// Commit the transaction
transaction.commit();