setOnClickListener（） 上的空指针异常

问：

我想从这个片段访问另一个布局的视图，该布局不属于片段。这就是我得到.NullPointerException

我该如何解决这个问题？

片段代码

public class Pacijenti_fragment extends Fragment  {
    //this is the JSON Data URL


    public final static String MESSAGE_KEY= "com.example.android.app";
    //a list to store all the products
    List<Pacijent> pacijentList;
    String id="";
    String ID="";
    //the recyclerview
    RecyclerView recyclerView;
    private SearchView searchView;
    private PacijentiAdapter adapter;
    Button btnPogled;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        final View view=inflater.inflate(R.layout.pacijenti_fragment, container, false);

        //getting the recyclerview from xml
        recyclerView = (RecyclerView)view.findViewById(R.id.recylcerView);
        recyclerView.setHasFixedSize(true);
        recyclerView.addItemDecoration(new MyDividerItemDecoration(getActivity(), DividerItemDecoration.VERTICAL, 36));
        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

        //initializing the productlist
        pacijentList = new ArrayList<>();
        btnPogled=(Button)findViewById(R.id.btnDodaj); //here i make my button
        Bundle b=getArguments();
        this.id=b.getString("id");
        System.out.println(id);
        ID = this.id;
        btnPogled.setOnClickListener(new View.OnClickListener(){ //here i get null pointer
            @Override
            public void onClick(View v) {
                OnPogled();
            }
        });

        //this method will fetch and parse json
        //to display it in recyclerview
        loadPacijenti();



        return view;

    }

这是我找到按钮的另一个 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="match_parent"
android:orientation="vertical">


    <RelativeLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:padding="8dp">
        <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:id="@+id/GornjiLayout"
        >
            <TextView
                android:id="@+id/textViewName"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:text="Jane"
             android:textAppearance="@style/Base.TextAppearance.AppCompat.Small"
                android:textColor="#000000" />

            <TextView
                android:id="@+id/textViewSurname"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"

                android:layout_marginLeft="5dp"

                android:layout_toRightOf="@id/textViewName"
                android:text="Doe"
             android:textAppearance="@style/Base.TextAppearance.AppCompat.Small"
                android:textColor="#000000"/>
        </LinearLayout>

        <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:id="@+id/SredjiLayout"
        android:layout_below="@id/GornjiLayout"
        >
            <TextView
                android:id="@+id/textViewDateOfBirth"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_below="@id/textViewName"
                android:layout_marginLeft="5dp"
                android:layout_marginRight="150dp"
                android:layout_marginTop="5dp"



                android:text="21.05.1989"
             android:textAppearance="@style/Base.TextAppearance.AppCompat.Small"
                android:textStyle="bold" />

            <Button
                android:id="@+id/buttonDodaj"
                android:layout_width="120dp"
                android:layout_height="wrap_content"
                android:text="Otvori" />


        </LinearLayout>
        <TextView
          android:id="@+id/textViewAdress"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_below="@id/SredjiLayout"
          android:layout_marginLeft="5dp"
          android:layout_marginTop="5dp"

          android:text="Some street 45, UnknownVille"
         android:textAppearance="@style/Base.TextAppearance.AppCompat.Small"
          android:textStyle="bold" />
    </RelativeLayout>

</LinearLayout>   

我不知道如何从片段访问其他xml。这个 xml 是单独的文件，因为它带有我编写的特定适配器进入 recyclerview。这个按钮需要在回收器视图中，因为每个按钮都应该传递来自数据库的每个人的 ID。