Android Data Binding pass arguments to onClick method

Question

Is it possible to pass custom arguments to onClick method using the Data Binding Library? I have my layout xml file where I need to use the onClickListener:

Answer 1

Multiple Ways:

Solution 1 (When you have Presenter)

You have a presenter or handler class like below

public class Presenter {
    public void onSaveClick(View view, Task task){}
}

Now take variable of type Presenter in your layout. and set click like below.

You can add any more arguments in this.

Please note that, you have to set these data variables. Like

ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
binding.setTask(task);
binding.setPresenter(presenter);

Solution 2 (When you don't have Presenter)

Create a variable type of your Activity / Fragment

and make method in your activity which you want to call from binding layout. and don't forget to call setActivity(YourActivity.this) from Activity.

public class MainActivity extends AppCompatActivity {
    public void onSaveClick(View view, Task task) {
        System.out.println("MainActivity.onSaveClick");
    }

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
        binding.setActivity(this);
        binding.setTask(task);
    }
}

Further reading Android DataBinding documentation

There are many other ways to set click, check this answer.