Android Data Binding two way binding with array

Question

I want to achieve two-way binding on a array with Data Binding in Android.

This is a simplified version of the code I have:

<data>
    <variable
        name="values"
        type="Integer[]" />
</data>

<EditText
    ...
    android:text="@={Converter.toString(values[0])} />

But when I try to build this code I get a message as follows:

cannot find method setTo(java.lang.Integer[], int, java.lang.Integer) in class android.databinding.ViewDataBinding

How can I achieve two-way binding with an array, if at all possible?

Weird. That method exists in ViewDataBinding.java: void setTo(T[] arr, int index, T value) -- you can check yourself. Are you somehow specifying a different library dependency than expected from the gradle plugin? — George Mount
– George Mount, Commented Nov 2, 2017 at 2:06
I checked and indeed found the method you mentioned. Where can I see the library dependancy, and what is it supposed to be. I only used these lines of code in my app's build.gradle dataBinding { enabled = true } — Jelmer Brands
– Jelmer Brands, Commented Nov 2, 2017 at 10:14

sanoop sandy · Accepted Answer · 2017-11-02 04:54:44Z

18

How about trying the following way by using ArrayList.

<data>
    <import type="java.util.ArrayList"/>
    <variable
        name="values"
        type="ArrayList&lt;Integer&gt;"/>
</data>

<EditText
    ...
    android:text="@={Converter.toString(values.get(0))} />

answered Nov 2, 2017 at 4:54

sanoop sandy

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1 Comment

Jelmer Brands Over a year ago

Thanks @sanoop, this worked for me. I was stuck in my head trying to figure out why Integer[] didn't work because I have seen @George Mount using it in an accepted answer for another post.

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