Kotlin自定义View实现一个通用的控件

效果图如下：

核心代码如下：

open class CommonItemView @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0, mode: Int = MODE_TEXT) : RelativeLayout(context, attrs, defStyleAttr) {

    companion object {

        const val MODE_TEXT = 0

        const val MODE_EDIT = 1
    }

    private lateinit var mTvRequireFlag: TextView

    private lateinit var mTvOrderKey: TextView

    private lateinit var mStubOrderItem: ViewStub

    private lateinit var mIvOrderGo: ImageView

    private lateinit var mTvItemValue: TextView

    private lateinit var mEtItemEdit: EditText

    private lateinit var mIvItemClear: ImageView

    private var isRequire: Boolean = false

    private var isGo: Boolean = true

    private var mKey: String? = ""

    private var mValue: String? = ""

    private var mHolder: String? = ""

    private var mLeftMargin: Int = dip(110)

    private var mMode: Int = mode

    init {
        val view = LayoutInflater.from(context).inflate(R.layout.view_order_item, this, true)
        initAttrs(attrs)
        initView(view)
        initData()
    }

    private fun initAttrs(attrs: AttributeSet?) {
        attrs?.apply {
            val array = context.obtainStyledAttributes(attrs, R.styleable.CommonItemView)
            isRequire = array.getBoolean(R.styleable.CommonItemView_orderRequired, false)
            isGo = array.getBoolean(R.styleable.CommonItemView_orderGo, true)
            mKey = array.getString(R.styleable.CommonItemView_orderKey) ?: ""
            mValue = array.getString(R.styleable.CommonItemView_orderValue) ?: ""
            mHolder = array.getString(R.styleable.CommonItemView_orderHolder) ?: ""
            mLeftMargin = array.getDimensionPixelSize(R.styleable.CommonItemView_orderLeftMargin, dip(110))
            mMode = array.getInt(R.styleable.CommonItemView_orderMode, MODE_TEXT)
            array.recycle()
        }
    }

    private fun initView(view: View) {
        mTvRequireFlag = view.findViewById(R.id.tv_require_flag)
        mTvOrderKey = view.findViewById(R.id.tv_order_key)
        mStubOrderItem = view.findViewById(R.id.stub_order_item)
        mIvOrderGo = view.findViewById(R.id.iv_order_go)
    }

    private fun initData() {
        setPadding(dip(16), 0, dip(16), 0)
        setBackgroundResource(R.color.white)
        //设置是否必填标志
        if (isRequire) {
            mTvRequireFlag.visibility = View.VISIBLE
        } else {
            mTvRequireFlag.visibility = View.GONE
        }
        //设置是否显示进入图标
        if (isGo) {
            mIvOrderGo.visibility = View.VISIBLE
        } else {
            mIvOrderGo.visibility = View.GONE
        }
        //设置Key
        mTvOrderKey.text = mKey
        if (mMode == MODE_EDIT) {
            mStubOrderItem.layoutResource = R.layout.order_stub_et
            val view = mStubOrderItem.inflate()
            mEtItemEdit = view.findViewById(R.id.stub_et)
            mEtItemEdit.hint = mHolder
            mEtItemEdit.setText(mValue)
            mIvItemClear = view.findViewById(R.id.stub_clear_iv)
            mEtItemEdit.addTextChangedListener(object : TextWatcher {
                override fun afterTextChanged(s: Editable?) {
                }

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

                override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
                    if (s.isNullOrEmpty()) {
                        mIvItemClear.visibility = View.GONE
                    } else {
                        mIvItemClear.visibility = View.VISIBLE
                    }
                }
            })
            mIvItemClear.setOnClickListener {
                mEtItemEdit.setText("")
            }
        } else {
            mStubOrderItem.layoutResource = R.layout.order_stub_tv
            mTvItemValue = mStubOrderItem.inflate() as TextView
            mTvItemValue.hint = mHolder
            mTvItemValue.setHintTextColor(ContextCompat.getColor(context, R.color.btn_color_not_active))
            mTvItemValue.text = mValue
        }
        //设置横向的Margin
        val params = mStubOrderItem.layoutParams as LayoutParams
        params.setMargins(mLeftMargin, 0, 0, 0)
    }

    /**
     * 设置左侧Margin
     */
    fun setLeftMargin(leftMargin: Int) {
        mLeftMargin = leftMargin
        val params = mStubOrderItem.layoutParams as LayoutParams
        params.setMargins(mLeftMargin, 0, 0, 0)
    }

    /**
     * 展示进入箭头
     */
    fun showGo() {
        isGo = true
        mIvOrderGo.visibility = View.VISIBLE
    }

    /**
     * 隐藏进入箭头
     */
    fun hideGo() {
        isGo = false
        mIvOrderGo.visibility = View.GONE
    }

    /**
     * 设置Text模式下的TextView颜色
     */
    fun setFixTextColor() {
        if (mMode == MODE_TEXT) {
            mTvItemValue.textColorResource = R.color.text_item_fixed
        }
    }

    /**
     * 设置正常模式包含多选下的颜色
     */
    fun setNormalTextColor() {
        if (mMode == MODE_TEXT) {
            mTvItemValue.textColorResource = R.color.text_color_primary
        }
    }

    /**
     * 设置Key
     */
    fun setItemKey(key: String?) {
        mKey = key
        mTvOrderKey.text = key
    }

    fun setMode(mode: Int) {
        mMode = mode
    }

    /**
     * 改变Value
     */
    fun setItemValue(value: String?) {
        mValue = value
        if (mMode == MODE_TEXT) {
            mTvItemValue.text = value
        } else if (mMode == MODE_EDIT) {
            mEtItemEdit.setText(value)
        }
    }

    /**
     * 获取当前Value
     */
    fun getItemValue(): String {
        return mValue ?: ""
    }

    /**
     * 获取当前Edit-Value
     */
    fun getItemEdit(): String {
        var result = ""
        if (mMode == MODE_EDIT) {
            result = mEtItemEdit.text.toString().trim()
        }
        return result
    }

    /**
     * 获取当前的Key
     */

    fun getItemKey(): String {
        return mKey ?: ""
    }

    /**
     * 设置当前Item是否必填
     */
    fun setRequire(isRequire: Boolean) {
        this.isRequire = isRequire
        mTvRequireFlag.visibility = if (isRequire) {
            View.VISIBLE
        } else {
            View.GONE
        }
    }

    /**
     * 设置Holder
     */
    fun setItemHolder(holder: String?) {
        mHolder = holder
        if (mMode == MODE_TEXT) {
            mTvItemValue.hint = holder
        } else if (mMode == MODE_EDIT) {
            mEtItemEdit.apply {
                inputType = InputType.TYPE_CLASS_TEXT
                hint = holder
                imeOptions = EditorInfo.IME_ACTION_DONE
            }

        }
    }


    fun setMaxLength(maxLength: Int) {
        mEtItemEdit.filters = arrayOf(InputFilter.LengthFilter(maxLength))
    }

}

styles.xml文件自定义属性

布局文件：

测试的例子：