WheelView is an Android library that provides a customizable wheel-like picker view. It allows users to select items from a circular list, similar to a date picker or time picker, but with the flexibility to display any type of content.

Pros

• Easy to integrate into Android projects
• Highly customizable appearance and behavior
• Smooth scrolling and animation
• Supports both vertical and horizontal orientations

Cons

• Limited documentation and examples
• Not actively maintained (last update was in 2018)
• May require additional work to adapt to modern Android development practices
• Lacks built-in accessibility features

Code Examples

1. Basic WheelView setup:

WheelView wheelView = findViewById(R.id.wheelview);
wheelView.setItems(Arrays.asList("Item 1", "Item 2", "Item 3", "Item 4", "Item 5"));
wheelView.setOnWheelViewListener(new WheelView.OnWheelViewListener() {
    @Override
    public void onSelected(int selectedIndex, String item) {
        Log.d("WheelView", "Selected item: " + item);
    }
});

2. Customizing WheelView appearance:

wheelView.setSeletion(2); // Set initial selection
wheelView.setVisibleItemCount(5); // Set number of visible items
wheelView.setTextSize(18); // Set text size
wheelView.setLineColor(Color.GRAY); // Set divider line color

3. Using WheelView in horizontal orientation:

wheelView.setOrientation(WheelView.HORIZONTAL);
wheelView.setTextAlign(Paint.Align.CENTER);

Getting Started

1. Add the JitPack repository to your project's build.gradle file:

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}

2. Add the dependency to your app's build.gradle file:

dependencies {
    implementation 'com.github.wangjiegulu:WheelView:0.3.3'
}

3. Add the WheelView to your layout XML:

<com.wangjie.wheelview.WheelView
    android:id="@+id/wheelview"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

4. Initialize and use the WheelView in your Activity or Fragment as shown in the code examples above.