Android圖片上傳九宮格(添加,刪除,預覽)

class AddImagesAdapter(    mContext: Context,    limtNum: Int,    addImgs: Int,    addCloseImgs: Int,    addErrImgs: Int,    addLimitNums: Int) :    RecyclerView.Adapter() {    var mContext: Context    var limtNum = 5    var addImgs = -1    var addCloseImgs = -1    var addErrImgs = -1    var addLimitNums = 9    var addImages = ArrayList()
    init {        this.mContext = mContext        this.limtNum = limtNum        this.addCloseImgs = addCloseImgs        this.addImgs = addImgs        this.addErrImgs = addErrImgs        this.addLimitNums = addLimitNums    }
    var listener: OnAddClickListener? = null
    fun setOnAddListener(listener: OnAddClickListener) {        this.listener = listener    }
    fun getHeight(): Int {        return (getScreenWidth(mContext)) / 5    }
    private fun dip2px(context: Context, dp: Int): Int {        val density = context.resources.displayMetrics.density        return (dp * density + 0.5).toInt()    }
    private fun getScreenWidth(context: Context): Int {        val wm = context            .getSystemService(Context.WINDOW_SERVICE) as WindowManager        val outMetrics = DisplayMetrics()        wm.defaultDisplay.getMetrics(outMetrics)        return outMetrics.widthPixels    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {        var viedataBinding: ItemAddImagesBinding =            DataBindingUtil.inflate(                LayoutInflater.from(mContext),                R.layout.item_add_images,                parent,                false            )
        var layout = RelativeLayout.LayoutParams(getHeight(), getHeight())        layout.setMargins(dip2px(mContext,1), dip2px(mContext,1), dip2px(mContext,1), dip2px(mContext,1))        viedataBinding.root.layoutParams = layout
        var dataBindingViewHolder: AddImagesViewHolder = AddImagesViewHolder(viedataBinding.root)        dataBindingViewHolder.setBinding(viewBinding = viedataBinding)        return dataBindingViewHolder    }

    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {        var ktHolder = holder as? AddImagesViewHolder        var binding = ktHolder!!.getBinding() as ItemAddImagesBinding        ktHolder?.getBinding()?.executePendingBindings()        if (addImgs!=-1){            binding!!.ivAdd.setBackgroundResource(addImgs)        }else{            binding!!.ivAdd.setBackgroundResource(R.drawable.iv_add_images_add)        }        if (addCloseImgs!=-1){            binding!!.ivClose.setBackgroundResource(addCloseImgs)        }else{            binding!!.ivClose.setBackgroundResource(R.drawable.iv_add_img_close)        }

        binding.rlClose.setOnClickListener {            processDelete(getItem(position))        }
        binding.rlAdd.setOnClickListener {            if (listener != null) listener!!.onAddClick(binding.rlAdd, getItem(position))        }
        binding.ivContent.setOnClickListener {            if (listener != null) listener!!.onAddClick(binding.ivContent, getItem(position))        }
        if (getItem(position)!!.type.equals("2")) {            binding.ivContent.visibility = View.VISIBLE            binding.rlClose.visibility = View.VISIBLE            binding.rlAdd.visibility = View.GONE            if (addErrImgs!=-1){             var requestOptions=   RequestOptions().error(addErrImgs)                Glide.with(mContext).load(getItem(position)!!.imgUrl).apply(requestOptions).into(binding.ivContent)            }else{                var requestOptions=   RequestOptions().error(R.drawable.iv_add_err)                Glide.with(mContext).load(getItem(position)!!.imgUrl).apply(requestOptions).into(binding.ivContent)            }
        } else {            binding.ivContent.visibility = View.GONE            binding.rlAdd.visibility = View.VISIBLE            binding.rlClose.visibility = View.GONE        }
    }
    private fun processDelete(item: AddImagesInfo?) {        addImages.remove(item)        if (!hasAdd()) {            addItem(AddImagesInfo(R.drawable.iv_add_images_add, "1"))        } else {            notifyDataSetChanged()????????}    }
    fun addItems(lists: List) {        processData(lists)    }
    fun addItem(info: AddImagesInfo) {        addImages.add(info)        notifyDataSetChanged()    }
    fun getItems(): ArrayList? {        if (this.addImages == null) this.addImages = ArrayList()        return this.addImages    }
    private fun processData(addDatas: List) {        if (addDatas == null) return
        var newList = processEnd(getItems()!!)        if (newList.size >= limtNum) return        if (newList!!.size + addDatas.size < addLimitNums) {            newList!!.addAll(addDatas)            newList!!.add(AddImagesInfo("", "1"))        } else {            newList!!.addAll(addDatas.subList(0, addLimitNums - newList.size))        }????????notifyDataSetChanged()    }
    private fun processEnd(addDatas: ArrayList): ArrayList {        if (addDatas == null) return addDatas        var iterator = addDatas.iterator()        while (iterator.hasNext()) {            var info = iterator.next()            if (info.type.equals("1")) iterator.remove()        }        return addDatas    }
    private fun hasAdd(): Boolean {        getItems()!!.forEach {            if (it.type.equals("1")) {                return true            }        }        return false????}
    override fun getItemCount(): Int {        return addImages.size    }
    fun getItem(position: Int): AddImagesInfo? {        if (addImages != null && position < addImages!!.size) {            return this.addImages!!.get(position)        }        return null    }
    interface OnAddClickListener {        fun onAddClick(view: View?, item: AddImagesInfo?)    }}

class AddImagesView @JvmOverloads constructor(    mContext: Context,    attrs: AttributeSet? = null,    defStyleAttr: Int = 0) : FrameLayout(mContext, attrs, defStyleAttr) {    private var mContext: Context    // 添加的圖片資源    private var addImgs = -1    //關閉的圖片資源    private var addCloseImgs = -1    //錯誤頁的圖片資源    private var addErrImgs = -1    //列數(shù)    private var columnNums = 5    //最大圖片數(shù)    private var add_limit_nums = 9
    private var mAdapter: AddImagesAdapter? = null

    init {        this.mContext = mContext        val tapeArray = mContext.obtainStyledAttributes(attrs, R.styleable.AddImagesStyle)        addImgs = tapeArray.getResourceId(R.styleable.AddImagesStyle_add_imgs, -1)        addCloseImgs = tapeArray.getResourceId(R.styleable.AddImagesStyle_add_close_imgs, -1)        addErrImgs = tapeArray.getResourceId(R.styleable.AddImagesStyle_add_err_imgs, -1)        columnNums = tapeArray.getInt(R.styleable.AddImagesStyle_column_nums, 5)        add_limit_nums = tapeArray.getInt(R.styleable.AddImagesStyle_add_limit_nums, 9)        initView()    }
    var listener: AddImagesViewListener? = null
    fun setAddImagesViewListener(listener: AddImagesViewListener) {        this.listener = listener    }
    //初始換數(shù)據(jù)    private fun initView() {        var binding = DataBindingUtil.inflate(            LayoutInflater.from(mContext),            R.layout.layout_add_images,            this,            false        )        addView(binding.root)        if (columnNums>5)columnNums=5        binding.rvContent.layoutManager = GridLayoutManager(mContext, columnNums)        mAdapter = AddImagesAdapter(mContext, columnNums,addImgs,addCloseImgs,addErrImgs,add_limit_nums)        binding.rvContent.adapter = mAdapter        mAdapter!!.addItem(AddImagesInfo("", "1"))        mAdapter!!.setOnAddListener(object : AddImagesAdapter.OnAddClickListener {            override fun onAddClick(view: View?, item: AddImagesInfo?) {                when (view!!.id) {                    R.id.rl_add -> {                        if (listener!=null)                        listener!!.onAdd()                    }                    R.id.iv_content -> {                        if (listener!=null)                        listener!!.onPreview(item,mAdapter!!.getItems())                    }                }            }
        })    }    //添加數(shù)據(jù)    fun addAddImages(lists: List<AddImagesInfo>) {        mAdapter!!.addItems(lists)    }

    interface AddImagesViewListener {        fun onAdd()        fun onPreview(item:AddImagesInfo?,lists: List<AddImagesInfo>?)    }
}