Using DataBinding library for binding events

Question

I\'m trying to bind events with views in xml using DataBinding Library shipped with Android M. I\'m following examples from Android Developers and implement

Answer 1

Use this format in your xml:

android:onClick="@{handlers::onClickFriend}"

Pay attention to the ::, do not worry about the red lines in xml editor, because is currently this is open bug for the Android Studio xml editor.

Where handlers is your variable from data tag:

and onClickFriend is your method:

public class MyHandlers {
    public void onClickFriend(View view) {
        Log.i(MyHandlers.class.getSimpleName(),"Now Friend");
    }
}

ADDED

For handle onLongClick in xml add this:

android:onLongClick="@{handlers::onLongClickFriend}"

and add onLongClickFriend method in your ViewModel class:

public class MyHandlers {
    public boolean onLongClickFriend(View view) {
        Log.i(MyHandlers.class.getSimpleName(),"Long clicked Friend");
        return true;
    }
}

ADDED

If you need to show toast message, you can use interface (better variant), or pass context in the MyHandlers class in construction:

public class MyHandlers {

    private Context context;

    public MyHandlers(Context context) {
        this.context = context;
    }

    public boolean onLongClickFriend(View view) {
        Toast.makeText(context, "On Long Click Listener", Toast.LENGTH_SHORT).show();
        return true;
    }
}