自定义Snap HorizontalScrollView布局绑定及setFeatureItems调用问题

Hey there! I totally get where you're stuck—custom views can feel tricky when the example uses dynamic views instead of XML-defined ones. Let's break this down step by step to get your layout tied to that HorizontalScrollView with snap effect:

1. Double-Check Your XML Configuration #

First, confirm you've correctly referenced your custom view in XML with the full package path, like this:

<com.yourpackage.view.YourCustomSnapHorizontalScrollView
    android:id="@+id/custom_scroll_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

Replace com.yourpackage.view with your actual package name, and YourCustomSnapHorizontalScrollView with the exact class name of the custom view you obtained.

2. Bind Your Layout to setFeatureItems #

The setFeatureItems method needs a list of View objects representing each scrollable item. You have two common ways to gather these views:

Option A: Inflate Your Item Layout Dynamically #

If you have a reusable item layout (e.g., item_my_feature.xml), you can inflate multiple instances of it, set their content, then pass them to the custom view:

// In your Activity/Fragment
val customScrollView = findViewById<YourCustomSnapHorizontalScrollView>(R.id.custom_scroll_view)
val featureItems = mutableListOf<View>()

// Inflate as many items as you need
for (position in 0 until 5) {
    val itemView = LayoutInflater.from(this)
        .inflate(R.layout.item_my_feature, customScrollView, false)
    
    // Customize the item content (e.g., set text, images)
    itemView.findViewById<TextView>(R.id.item_title).text = "My Item $position"
    
    featureItems.add(itemView)
}

// Finally, bind the items to the custom scroll view
customScrollView.setFeatureItems(featureItems)

Option B: Use Views Already Defined in XML #

If you've already added child views directly inside the custom HorizontalScrollView in your layout XML, you can collect those existing views and pass them to setFeatureItems:

// In your Activity/Fragment
val customScrollView = findViewById<YourCustomSnapHorizontalScrollView>(R.id.custom_scroll_view)
val featureItems = mutableListOf<View>()

// Loop through all direct child views of the scroll view
for (i in 0 until customScrollView.childCount) {
    val childView = customScrollView.getChildAt(i)
    featureItems.add(childView)
}

// Bind the existing views
customScrollView.setFeatureItems(featureItems)

A Quick Note on SnapHelper vs. This Custom View #

You're right that SnapHelper makes snap behavior trivial for RecyclerViews—super convenient! But if your project requires using this specific HorizontalScrollView implementation, the steps above will get your layout connected properly.

内容的提问来源于stack exchange，提问作者nimi0112