今天先放code 明天再來解釋 還有些地方我看不懂

來源

https://github.com/victorfan336/WheelView

首先導入

implementation 'com.wx.wheelview:wheelview:1.3.3'

XML 設計

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

</com.wx.wheelview.widget.WheelView>

自定義view

<TextView
        android:id="@+id/item_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:layout_margin="10dp"
        android:gravity="center"
        android:singleLine="true"
        android:textSize="20sp" android:text="test"/>

自定義adapter

class MyWheelAdapter(private val mContext: Context) : BaseWheelAdapter() {

override fun bindView(position: Int, convertView: View?, parent: ViewGroup): View {
    var convertView = convertView
    val viewHolder: ViewHolder
    if (convertView == null) {
        viewHolder = ViewHolder()
        convertView = LayoutInflater.from(mContext).inflate(R.layout.item_list, null)
        viewHolder.textView = convertView!!.findViewById(R.id.item_name) as TextView
        convertView.tag = viewHolder
    } else {
        viewHolder = convertView.tag as ViewHolder
    }
    viewHolder.textView!!.text = mList[position]
    return convertView
}

internal class ViewHolder {
    var textView: TextView? = null

}

}

Activity明天完成 我本來以為很簡單 結果弄了半天弄不出來 今天先寫一半