Styjun

I have a fragment whose layout consists of a custom view (MyCanvasView) and a button. I am trying to access a variable through a getter method in the MyCanvasView class. I am able to access the button to make an OnClickListener, but trying to access the custom view the same way doesn't work. vMapView remains null. How can I get access to the custom view from the fragment that contains it?

In fragment java file:

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) 
 View v = inflater.inflate(R.layout.select_anchor, container, false);

 Button btnSubmitAnchor = (Button) v.findViewById(R.id.btn_submit_anchor);
 MyCanvasView vMapView = (MyCanvasView) v.findViewById(R.id.anchor_selection_view);

 btnSubmitAnchor.setOnClickListener((view) - > 

 receivedAnchor = vMapView.getTempAnchor();
 try 
 Log.i(TAG, "Received anchor:n" + receivedAnchor.getName());
 catch (Exception e) 
 Log.i(TAG, "no anchor was received");
 
 );

 return v;

In MyCanvasView.java:

public Anchor getTempAnchor() 
 return tempAnchor;

In select_anchor.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent" android:layout_height="match_parent">

 <view
 android:id="@+id/anchor_selection_view"
 class="com.decawave.argomanager.ui.view.MyCanvasView"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_centerHorizontal="true"
 android:layout_alignParentTop="true"
 android:layout_centerVertical="true"
 />

 <Button
 android:id="@+id/btn_submit_anchor"
 style="@style/MtrlBorderlessButton"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_centerHorizontal="true"
 android:layout_alignParentBottom="true"
 android:layout_margin="5dp"
 android:text="@string/btn_submit_anchor" />


</RelativeLayout>

Try thus way:

<com.decawave.argomanager.ui.view.MyCanvasView

 android:id="@+id/anchor_selection_view"

 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_centerHorizontal="true"
 android:layout_alignParentTop="true"
 android:layout_centerVertical="true"
 />