为SeekBar等控件添加数据绑定属性

<SeekBar
    android:id="@+id/seekBar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:progress="@{viewModel.progress}"
    android:onProgressChanged="@{viewModel::onProgressChanged}" />

public class ViewModel extends BaseObservable {
    private int progress;

    public int getProgress() {
        return progress;
    }

    public void setProgress(int progress) {
        this.progress = progress;
        notifyPropertyChanged(BR.progress);
    }

    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        setProgress(progress);
    }
}

public class MainActivity extends AppCompatActivity {
    private ViewModel viewModel;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);
        viewModel = new ViewModel();
        binding.setViewModel(viewModel);
    }
}