Using DataBinding library for binding events

Many Ways for setting Click

1. Pass handler to binding.

   ActivityMainBinding binding = DataBindingUtil.setContentView(this,R.layout.activity_main); Hander handler = new Handler(); binding.setHandler(handler);

2. Set clicks (use any of below)

   android:onClick="@{handler::onClickMethodReference}"

OR

android:onClick="@{handler.onClickMethodReference}"

OR

android:onClick="@{() -> handler.onClickLamda()}"

OR

android:onClick="@{(v) -> handler.onClickLamdaWithView(v)}"

OR

android:onClick="@{() -> handler.onClickLamdaWithView(model)}"

See Handler class for understanding.

public class Handler {
    public void onClickMethodReference(View view) {
        //
    }
    public void onClickLamda() {
        //
    }
    public void onClickLamdaWithView(View view) {
        //
    }
    public void onClickLamdaWithObject(Model model) {
        //
    }
}

Note that

• You can use Method Reference (::) when you have same argument as the attribute onClick.
• You can pass any object like onClickLamdaWithObject example.
• If you need to pass View object then just use (v)-> expression.

Further reading

https://developer.android.com/topic/libraries/data-binding/expressions

I think you will need to bind the handlers as well, maybe something like this in onCreate:

MyHandlers handlers = new MyHandlers();
binding.setHandlers(handlers);