Wie findViewById in einer öffentlichen Klasse verwendet wird ItemThreeFragment extends Fragment

Question

Ich möchte ein anderes Fragment in meinem Fragment anzeigen, das gezeigt wurde, und wenn ich es starte, wird es einen Fehler zeigen Fehler: (31, 75) error: kann Symbolmethode nicht finden findViewById (int), ist ihre Art, wie kann ich die findViewByID in einer Fragmentklasse nicht AppCompatActivity verwenden?

ItemThreeFragment.java 

public class ItemThreeFragment extends Fragment { 


private BottomNavigationView bottomNavigationView; 

public static ItemThreeFragment newInstance() { 
    ItemThreeFragment fragment = new ItemThreeFragment(); 
    return fragment; 
} 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    BottomNavigationView bottomNavigationView = (BottomNavigationView)findViewById(R.id.NavGroup); 

    bottomNavigationView.setOnNavigationItemSelectedListener(
      new BottomNavigationView.OnNavigationItemSelectedListener(){ 

       @Override 
       public boolean onNavigationItemSelected(@NonNull MenuItem item) { 
        Fragment selectedFragment1 = null; 
        switch (item.getItemId()){ 
         case R.id.groupJoined: 
          selectedFragment1 = GroupOne.newInstance(); 
          break; 
         case R.id.createGroup: 
          selectedFragment1 = GroupTwo.newInstance(); 
          break; 
        } 

        FragmentTransaction trans = getChildFragmentManager().beginTransaction(); 
        trans.replace(R.id.groupFrame_layout, selectedFragment1); 
        trans.commit(); 
        return true; 

       } 
      }); 


} 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 

    return inflater.inflate(R.layout.fragment_item_three, container, false); 

} 
} 

-Code für das Fragment, was im

GroupOne.java 

public class GroupOne extends Fragment { 
public static GroupOne newInstance() { 
    GroupOne fragment = new GroupOne(); 
    return fragment; 
} 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
} 

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

für GroupTwo.java

public class GroupTwo extends Fragment { 
public static GroupTwo newInstance() { 
    GroupTwo fragment = new GroupTwo(); 
    return fragment; 
} 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
} 

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

Das ist meine Hauptaktivität

public class MainActivity erweitert AppCompatActivity Aufruf {

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    BottomNavigationView bottomNavigationView = (BottomNavigationView) 
      findViewById(R.id.NavBot); 

    bottomNavigationView.setOnNavigationItemSelectedListener 
      (new BottomNavigationView.OnNavigationItemSelectedListener() { 
       @Override 
       public boolean onNavigationItemSelected(@NonNull MenuItem item) { 
        Fragment selectedFragment = null; 
        switch (item.getItemId()) { 
         case R.id.home: 
          selectedFragment = ItemOneFragment.newInstance(); 
          break; 
         case R.id.search: 
          selectedFragment = ItemTwoFragment.newInstance(); 
          break; 
         case R.id.groups: 
          selectedFragment = ItemThreeFragment.newInstance(); 
          break; 
        } 
        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction(); 
        transaction.replace(R.id.frame_layout, selectedFragment); 
        transaction.commit(); 
        return true; 
       } 
      }); 

    //Manually displaying the first fragment - one time only 
    FragmentTransaction transaction = getSupportFragmentManager().beginTransaction(); 
    transaction.replace(R.id.frame_layout, ItemOneFragment.newInstance()); 
    transaction.commit(); 

    //Used to select an item programmatically 
    //bottomNavigationView.getMenu().getItem(2).setChecked(true); 
} 

activity_main.xml

<android.support.design.widget.CoordinatorLayout 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/activity_main" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
tools:context="com.findforme.www.myapplication.MainActivity"> 

<FrameLayout 
    android:id="@+id/frame_layout" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:layout_above="@+id/navigation" 
    android:animateLayoutChanges="true" 
    android:layout_below="@+id/bottomNavigationView"> 
</FrameLayout> 

<android.support.design.widget.BottomNavigationView 

    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:id="@+id/NavBot" 
    android:layout_gravity="bottom" 
    app:menu="@menu/menu_nav" 
    android:background="@color/Lime" 
    app:itemIconTint="@android:color/white" 
    app:itemTextColor="@android:color/white"></android.support.design.widget.BottomNavigationView> 

fragment_item_three.xml

<ScrollView 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/ScrollView01" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent"> 


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:orientation="vertical" 
    android:gravity="center" 
    android:weightSum="1"> 

    <SearchView 
     android:layout_width="match_parent" 
     android:layout_height="60dp" 
     android:id="@+id/searchGroup" 
     android:scrollbarSize="10dp"/> 

    <android.support.design.widget.BottomNavigationView 

     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/NavGroup" 
     android:layout_gravity="bottom" 
     app:menu="@menu/menu_group" 
     android:background="@color/Lime" 
     app:itemIconTint="@android:color/white" 
     app:itemTextColor="@android:color/white"></android.support.design.widget.BottomNavigationView> 

    <FrameLayout 
     android:id="@+id/groupFrame_layout" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:layout_above="@+id/navigation" 
     android:animateLayoutChanges="true" 
     android:layout_below="@+id/bottomNavigationView"> 
    </FrameLayout> 

</LinearLayout> 

fragment_group_one.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
tools:context="com.findforme.www.myapplication.GroupOne"> 

<!-- TODO: Update blank fragment layout --> 

<TextView 
    android:text="Hay salamat" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:id="@+id/textView3" /> 

fragment_group_two.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
tools:context="com.findforme.www.myapplication.GroupTwo"> 

<!-- TODO: Update blank fragment layout --> 
<TextView 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:text="Hay Humana" /> 

Answer 1

Beispielcode

@Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    View view = inflater.inflate(R.layout.fragment_group_two, container, false); 
    TextView tv = (TextView) view.findViewById(R.id.tv) 
    return view; 
} 

Answer 2

Dies ist die Antwort auf meine Frage

private void findViews(View view) 
{ 
    bottomNavigationView = (BottomNavigationView)view.findViewById(R.id.NavGroup); 
    bottomNavigationView.setOnNavigationItemSelectedListener(
      new BottomNavigationView.OnNavigationItemSelectedListener(){ 

       @Override 
       public boolean onNavigationItemSelected(@NonNull MenuItem item) { 
        Fragment selectedFragment1 = null; 
        switch (item.getItemId()){ 
         case R.id.groupJoined: 
          selectedFragment1 = GroupOne.newInstance(); 
          break; 
         case R.id.createGroup: 
          selectedFragment1 = GroupTwo.newInstance(); 
          break; 
        } 

        FragmentTransaction trans = getFragmentManager().beginTransaction(); 
        trans.replace(R.id.groupFrame_layout, selectedFragment1); 
        trans.commit(); 
        return true; 

       } 
      }); 
} 

dann im onCreateView hinzufügen

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    View view = inflater.inflate(R.layout.fragment_item_three, container, false); 
    findViews(view); 
    return view; 

}