Android binding adapter passing multiple arguments cause error

Question

I am quite new in Android Data Binding. I am following this tutorial: Data Binding Library. I am trying to do an adapter that receive multiple parameters. This is my code:

XML

   <ImageView
            android:layout_width="@dimen/place_holder_size"
            android:layout_height="@dimen/place_holder_size"
            android:layout_alignParentRight="true"
            android:layout_alignParentTop="true"
            android:layout_centerVertical="true"
            app:url="@{image.imageUrl}"
            app:size="@{@dimen/place_holder_size}"
            />

BINDING ADAPTER CLASS

public class ViewBindingAdapters extends BaseObservable {

@BindingAdapter({"bind:url", "bind:size"})
public static void loadImage(ImageView imageView, String url, int size) {
    if (!Strings.isNullOrEmpty(url)) {
        Picasso.with(imageView.getContext()).load(url).resize(size, size).centerCrop().into(imageView);
    }
}
....


}

But I am getting this error:

java.lang.RuntimeException: Found data binding errors. ****/ data binding error ****msg:Cannot find the setter for attribute 'app:url' with parameter type java.lang.String on android.widget.ImageView. file:... li_image_item.xml loc:30:27 - 30:40 ****\ data binding error ****

Does anybody know why??

Thanks in advance!

In the tutorial they do it like this, in the paragraph: Custom Setters. — IrApp
– IrApp, Commented Dec 6, 2016 at 11:35
yes indeed: '''Custom namespaces are ignored during matching''', is image.imageUrl a String? — pskink
– pskink, Commented Dec 6, 2016 at 11:37

Community · Accepted Answer · 2017-05-23 12:26:00Z

61

Problem is @dimen/place_holder_size, it returns float while you are catching it as int

change you BindingAdapter method to this

@BindingAdapter({"bind:url", "bind:size"})
public static void loadImage(ImageView imageView, String url, float size) {

}

you can refer this

edited May 23, 2017 at 12:26

CommunityBot

11 silver badge

answered Dec 6, 2016 at 11:51

Ravi

35.7k22 gold badges126 silver badges188 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Usman Rana Over a year ago

If i set change url value then it calls this method and when i set size value then this method is called again. Is there any way that it calls only once when both values are set

Kishan Solanki · Accepted Answer · 2018-12-06 10:10:33Z

25

What I did wrong is the order of the arguments in the function. You can add multiple attributes in Binding Adapter, but they should match the arguments with the same sequence defined in the method.

Here is my code snippet for Kotlin

@BindingAdapter(value = ["bind:brand", "bind:model", "bind:age"], requireAll = false)
@JvmStatic
fun bindProductDetails(linearLayout: LinearLayout, brand: String?, model: String?, age: String?) {
    if (brand != null && !brand.isEmpty()) {
        //code
        //code

    }
}

answered Dec 6, 2018 at 10:10

Kishan Solanki

14.7k6 gold badges95 silver badges90 bronze badges

Comments

Nas · Accepted Answer · 2016-12-06 11:40:55Z

10

try this

 @BindingAdapter(value={"url", "size"}, requireAll=false)
 public static void loadImage(ImageView imageView, String url, int size) {
        if (!Strings.isNullOrEmpty(url)) {
            Picasso.with(imageView.getContext()).load(url).resize(size, size).centerCrop().into(imageView);
        }
    }

answered Dec 6, 2016 at 11:40

Nas

2,1981 gold badge21 silver badges40 bronze badges

1 Comment

Nas Over a year ago

just clean and rebuild project bcoz sometime studio not update it still it not work try it with invalid catches or restart ur IDE(may be stupid bt it works sometime)

sud007 · Accepted Answer · 2020-08-24 11:06:35Z

Apart from the example provided above by @Kishan Solanki, And with changes happening in the Data Binding library, all you need is to declare them with comma separated values. Example

@BindingAdapter("loadImageFrom", "widthDp")
fun loadImages(imageView: ImageView, url: String?, widthDp: Int) {
    url?.let {

        val height = (widthDp / 3) * 4
        val fullUrl = getImagePosterUrl(url)
        Picasso.get().load(fullUrl).resize(widthDp.px, height.px).into(imageView)
    }

}

Bu the most important thing to remember is that you provide the data to the adapter attributes, in the DataBinding format.

example to provide Int as parameter in XML you have to write

app:widthDp="@{120}"

which is

app:your_attribute="@{your_data}"

P. S. - Oh and one more thing, widthDp**.px** is an extension function which converts Int of a dp value to relevant pixels value based on screen density. So don't get confused.

Community · Accepted Answer · 2020-06-20 09:12:55Z

5

Update

You don't need to create prefix bind:, just use this.

@BindingAdapter({"url", "size"})
public static void loadImage(ImageView imageView, String url, float size) {

}

In xml use any prefix like app:

app:url="@{image.imageUrl}"

edited Jun 20, 2020 at 9:12

CommunityBot

11 silver badge

answered Aug 7, 2018 at 9:23

Khemraj Sharma

59.1k30 gold badges215 silver badges229 bronze badges

Comments

CoolMind · Accepted Answer · 2021-09-29 13:08:14Z

See https://developer.android.com/topic/libraries/data-binding/binding-adapters.

@BindingAdapter("imageUrl", "placeholder", requireAll = false)
fun ImageView.setImageUrl(url: String?, placeHolder: Drawable?) {
    if (url == null) {
        setImageDrawable(placeholder)
    } else {
        MyImageLoader.loadInto(this, url, placeholder)
    }
}

Note that BindingAdapter attributes and setImageUrl parameters may have different names. But they should go in the same order. If some of these attributes are defined in XML (in this example it is ImageView), this method will be called.

<ImageView 
    app:imageUrl="@{venue.imageUrl}"
    app:placeholder="@{@drawable/venueError}" />

Attributes should have the same types as defined in the method. You can also use listeners. Instead of Kotlin lambdas use interfaces.

This class should be put in the same module with XML. Otherwise you will get an error like AAPT: error: attribute imageUrl (aka com.example.imageUrl) not found..

Collectives™ on Stack Overflow

Android binding adapter passing multiple arguments cause error

6 Answers 6

1 Comment

Comments

1 Comment

Comments

Update

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

6 Answers 6

1 Comment

Comments

1 Comment

Comments

Update

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related