if(Activity窗口是第一次被请求执行测量、布局和绘制操作){
    if(如果窗口的类型是有状态栏的){
        Activity窗口所需要的宽度和高度就是除了状态栏;
    }else{
        Activity窗口所需要的宽度和高度就是整个屏幕的宽高;
    }
}else{
    Activity窗口的宽高为frame成员变量中的保存的上一次测量、布局和绘制时的值;
}

startActivity<secondActivity>()

class GridAdapter(private val context: Context, private val strList:MutableList<myItems>, private val background:Int) : BaseAdapter() {
    override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {
        var view = convertView
        val holder:ViewHolder
        if (convertView == null) {
            view = LayoutInflater.from(context).inflate(R.layout.item, null)
            //我猜这个函数的作用是指定这个类所对应的小毛驴文件
            holder = ViewHolder()
            holder.myLayout = view.findViewById<LinearLayout>(R.id.all)
            holder.desc = view.findViewById<TextView>(R.id.textView)
            holder.pic = view.findViewById<ImageView>(R.id.imageView)
            view.tag = holder
        } else {
            holder = (view?.tag) as ViewHolder
        }
        //以上是固定格式
        val myItem = strList[position]
        //传进来的数据数组，适配器根据数组大小反复调用这个函数构造ViewList
        //position是当前位置，对应数组下标
        //holder.myLayout.setBackgroundColor(background)
        holder.desc.text = myItem.desc
        holder.pic.setImageResource(myItem.image)
        //以上是自定义每个控件的显示内容
        return view!!
    }

    override fun getItem(position: Int): Any = strList[position]
    override fun getItemId(position: Int): Long = position.toLong()
    override fun getCount(): Int = strList.size

    inner class ViewHolder {
        lateinit var myLayout:LinearLayout
        lateinit var desc: TextView
        lateinit var pic: ImageView
    }
}

inner class EditWatcher : TextWatcher {
    override fun afterTextChanged(s:Editable) {

    }
    override fun beforeTextChanged(s:CharSequence, start:Int, count:Int, after:Int) {

    }
    override fun onTextChanged(s:CharSequence, start:Int, count:Int, after:Int) {
        
    }
}

class BlankFragment : Fragment() {
    var ctx:Context? = null
    var mPosition:Int = 0
    var mInageId:Int = 0
    var mDesc:String = ""
    var title:String = ""

    val colorNames = listOf<String>("红色","黄色","绿色","青色","蓝色")
    val colors = intArrayOf(Color.RED, Color.YELLOW, Color.GREEN, Color.CYAN, Color.BLUE)
    var mSeq:Int = 0
    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        ctx = activity
        if (arguments != null) {
            mPosition = arguments!!.getInt("position", 0)
            mInageId = arguments!!.getInt("image_id", 0)
            mDesc = arguments!!.getString("desc")
            title = arguments!!.getString("title")
        }//获取数据
        val view = inflater.inflate(R.layout.show_info, container, false)

        view.findViewById<ImageView>(R.id.imageView).setImageResource(mInageId)
        view.findViewById<TextView>(R.id.textView).text = mDesc
        //显示数据
        return view
    }

    companion object {
        fun newInstance(position:Int, image_id:Int, desc:String, title:String) : BlankFragment {//调用这个函数，创建新的fragment

            val fragment = BlankFragment()
            val bundle = Bundle()
            bundle.putInt("position", position)
            bundle.putInt("image_id", image_id)
            bundle.putString("desc", desc)
            bundle.putString("title", title)
            fragment.arguments = bundle
            return fragment
        }
    }
}

class BlankFragment : Fragment() {
    var ctx:Context? = null
    var mPosition:Int = 0
    var mInageId:Int = 0
    var mDesc:String = ""
    var title:String = ""

    val colorNames = listOf<String>("红色","黄色","绿色","青色","蓝色")
    val colors = intArrayOf(Color.RED, Color.YELLOW, Color.GREEN, Color.CYAN, Color.BLUE)
    var mSeq:Int = 0
    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        ctx = activity
        if (arguments != null) {
            mPosition = arguments!!.getInt("position", 0)
            mInageId = arguments!!.getInt("image_id", 0)
            mDesc = arguments!!.getString("desc")
            title = arguments!!.getString("title")
        }
        val view = inflater.inflate(R.layout.show_info, container, false)

        view.findViewById<ImageView>(R.id.imageView).setImageResource(mInageId)
        view.findViewById<TextView>(R.id.textView).text = mDesc
        view.findViewById<Button>(R.id.se).setOnClickListener {
            ctx!!.selector("选择颜色", colorNames) {
                mSeq = it

                val intent = Intent(BlankFragment.EVENT)
                intent.putExtra("seq", it)
                intent.putExtra("color", colors[it])
                ctx!!.sendBroadcast(intent)//发送广播
            }
        }
        return view
    }

    companion object {
        const val EVENT:String = "changeColor"//const，编译期常量
        fun newInstance(position:Int, image_id:Int, desc:String, title:String) : BlankFragment {

            val fragment = BlankFragment()
            val bundle = Bundle()
            bundle.putInt("position", position)
            bundle.putInt("image_id", image_id)
            bundle.putString("desc", desc)
            bundle.putString("title", title)
            fragment.arguments = bundle
            return fragment
        }
    }
}