Android DataBinding Dynamic addView

Question

I have two layout xml A and B

A linearlayout in A xml with id 'layout'

Now I want to add B in layout using layout.addView()

How can i do this by using databinding

Answer 1

I don't think this is the best practice, but here's how I dynamically added views with databinding.

In layout A, I have a FrameLayout like below:

<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    bind:createView="@{viewModel.dynamicViews}">

In my viewModel class, I have a static method with BindingAdapter annotation,

@BindingAdapter("bind:createView")
public static void createImproveView(FrameLayout layout, LinearLayout replacement) {
    layout.removeAllViews();
    layout.addView(replacement);
}

and I have my replacement layout here:

public LinearLayout getDynamicViews() {
    LinearLayout layout = new LinearLayout(mContext);
    // dynamically add views here. This could be your layout B.
    return layout;
}

I couldn't find any other solutions, and this was working fine for me. Please give me any comments, I'm open to learn better solutions!

Answer 2

addView(databinding.getRoot())
you can see the getRoot() return a View instance, so you can addView by this method.

This databinding is the databinding instance of the view you want to add.