具有自定义视图和自定义属性的安卓双向DataBinding

public class CustomView extends View {
    private String customText;

    public CustomView(Context context) {
        super(context);
    }

    public CustomView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public String getCustomText() {
        return customText;
    }

    public void setCustomText(String customText) {
        this.customText = customText;
        invalidate(); // 刷新视图
    }
}

<layout xmlns:android="http://schemas.android.com/apk/res/android">
    <data>
        <variable
            name="viewModel"
            type="com.example.ViewModel" />
    </data>

    <com.example.CustomView
        android:id="@+id/customView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:customText="@={viewModel.customText}" />
</layout>

public class ViewModel extends BaseObservable {
    private String customText;

    @Bindable
    public String getCustomText() {
        return customText;
    }

    public void setCustomText(String customText) {
        this.customText = customText;
        notifyPropertyChanged(BR.customText);
    }
}