Data Binding onTouch in a layout

Question

I changed my project to use Android Data Binding.

Everthing works fine except the onTouchListener on my custom SectorImageView which inherit AppCompatImageView. It has to be an OnTouch event instead of a ClickListener to handle x and y coordinates of the click.

As i implemented the Android Data Binding none of my listeners worked so i decided to use the XML approach.

Question

Is there any way to handle onTouchListener by simply adding an OnTouchListener to the class without using XML approach? Why the listener don't get recognized anymore when i implement the Android Data Binding?

Here is some code i tried to work with:

Java code

@BindingAdapter("app:onTouchListener")
public boolean onTouch(View view, MotionEvent event) {
    // do something
}

XML layout

<x.y.z.SectorImageView
                android:id="@+id/image_sector"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:adjustViewBounds="true"
                app:onTouchListener="@{(view, event) -> onTouch(view, event)}"
                app:srcCompat="@drawable/map" />

Error

****/ data binding error ****msg:Cannot find method onTouch on ViewDataBinding

Answer 1

Try this:

In .java file add like:

@BindingAdapter("touchListener")
public void setTouchListener(View self, boolean value){
    self.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View view, MotionEvent event) {
            // Check if PRESSED
            if (event.getAction() == MotionEvent.ACTION_DOWN){
                // code stuff
            }
            // Check if RELEASED
            else if (event.getAction() == MotionEvent.ACTION_UP) {
                // code stuff
            }
            return false;
       }
    });
}

In .xml file add like:

<x.y.z.SectorImageView  app:touchListener="@{true}"}"/>