stackView

 使用stackView，表现出view堆叠的效果，可以拖动，也可以触发事件切换

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <StackView
        android:id="@+id/mStackView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:loopViews="true" />
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="上一个"
            android:onClick="prev"/>
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="下一个"
            android:onClick="next"/>
    </LinearLayout>
</LinearLayout>

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:padding="4dp">
<ImageView
    android:id="@+id/image1"
    android:layout_width="120dp" 
    android:layout_height="120dp" 
    />    
</LinearLayout>

package com.example.adapterviewflipper

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.view.ViewGroup
import android.widget.*

class MainActivity : AppCompatActivity() {

    private var stackView: StackView? = null
    private var imageIds = intArrayOf(R.drawable.bomb5, R.drawable.bomb6,
        R.drawable.bomb7, R.drawable.bomb8, R.drawable.bomb9,
        R.drawable.bomb10, R.drawable.bomb11, R.drawable.bomb12,
        R.drawable.bomb13, R.drawable.bomb14, R.drawable.bomb15,
        R.drawable.bomb16)
    override fun onCreate(savedInstanceState: Bundle?)
    {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        stackView = findViewById(R.id.mStackView)
        // 创建一个List对象，List对象的元素是Map
        val listItems = ArrayList<Map<String, Any>>()
        for (i in imageIds.indices)
        {
            val listItem = HashMap<String, Any>()
            listItem["image"] = imageIds[i]
            listItems.add(listItem)
        }
        // 创建一个SimpleAdapter
        val simpleAdapter = SimpleAdapter(this, listItems,
            R.layout.cell, arrayOf("image"),
            intArrayOf(R.id.image1)) // 使用/layout/cell.xml文件作为界面布局
        stackView?.adapter = simpleAdapter
    }

    fun prev(view: View)
    {
        // 显示上一个组件
        stackView?.showPrevious()
    }

    fun next(view: View)
    {
        // 显示下一个组件
        stackView?.showNext()
    }
}