Kotlin 自定义AlertDialog

 最近写的一个简易选择框

 长这个样子：

有多种模式：

1.输入框模式，有一个标题一个输入框。见上图（构造方法中 isEdit 字段 true的时候是开启输入框）

2.还有一种提示模式，有一个标题一个内容。

扩展：更多模式 比如  一个标题一个内容一个输入框，等。。。  

/**
 * Created by Xinghai.Zhao on 2020/8/4.
 * 自定义选择弹框
 */
class CustomDialog(context: Context?) : AlertDialog(context){

    var mCallBack: ClickCallBack? = null;
    var mTextViewTitle: TextView? = null;
    var mTextViewContent: TextView? = null;
    var mYesButton: View? = null;
    var mNoButton: View? = null;
    var mEditText: EditText? = null;

    constructor(context: Context?, title: String?, content: String?, callBack: clickCallBack)
            : this(context, title, content, callBack, false) {
    }

    constructor(context: Context?, title: String?, content: String?, callBack: clickCallBack, isEdit: Boolean) : this(context) {
        mCallBack= callBack
        if (title != null) mTextViewTitle?.text = title;
        if (content != null) mTextViewContent?.text = content;
        if (isEdit){
            mTextViewContent?.visibility = View.GONE
            mEditText?.visibility=View.VISIBLE
            //最大输入长度
            mEditText?.filters = arrayOf<InputFilter>(InputFilter.LengthFilter(10)) 
            mEditText?.isFocusable = true
            mEditText?.isFocusableInTouchMode = true
            mEditText?.requestFocus()
            mEditText?.keyListener = object : DigitsKeyListener() {
                override fun getInputType(): Int {
                    return InputType.TYPE_TEXT_VARIATION_PASSWORD
                }

                override fun getAcceptedChars(): CharArray {
                    //限制文字输入内容
                    return context?.resources!!.getString(R.string.edit_input)?.toCharArray()
                }
            }
        }

    }

    init {
        val inflate = LayoutInflater.from(context).inflate(R.layout.dialog_custom, null);
        setView(inflate)
        //设置点击别的区域不关闭页面
        setCancelable(false)

        mEditText= inflate.findViewById<EditText>(R.id.dialog_custom_edit)
        mTextViewTitle = inflate.findViewById<TextView>(R.id.dialog_custom_title)
        mTextViewContent = inflate.findViewById<TextView>(R.id.dialog_custom_content)
        mYesButton = inflate.findViewById<View>(R.id.dialog_custom_yes)
        mNoButton = inflate.findViewById<View>(R.id.dialog_custom_no)
        mYesButton?.setOnClickListener{mCallBack?.onYesClick(this)}
        mNoButton?.setOnClickListener{dismiss()}
    }

    interface clickCallBack {
        fun onYesClick(dialog:MyDialog)
    }


}

Layout文件：dialog_custom

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:background="@drawable/white_circle_background10">

    <TextView
        android:id="@+id/dialog_custom_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:padding="20dp"
        android:textColor="@color/TextBlack"
        android:textSize="@dimen/TextSizeTitle" />
    <TextView
        android:id="@+id/dialog_custom_content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:paddingBottom="20dp"
        android:textColor="@color/TextGray"
        android:textSize="@dimen/TextSizeContent" />
    <TextView
        android:layout_height="1dp"
        android:layout_width="match_parent"
        android:background="@color/LightGrayStill" />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <TextView
            android:id="@+id/dialog_custom_no"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="10dp"
            android:text="取消"
            android:textColor="@color/TextGray"
            android:textSize="@dimen/TextSizeContent" />

        <TextView
            android:layout_width="1dp"
            android:layout_height="match_parent"
            android:background="@color/LightGrayStill" />
        <TextView
            android:id="@+id/dialog_custom_yes"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:text="确认"
            android:gravity="center"
            android:padding="10dp"
            android:textColor="@color/TextGray"
            android:textSize="@dimen/TextSizeContent" />


    </LinearLayout>

</LinearLayout>

外部调用代码

/*
             *作者:赵星海
             *时间:2020/6/17 11:07
             *用途: 输入台牌号
             */
            val myDialog =MyDialog(activity,"请输入台牌号","",object :MyDialog.clickCallBack{
                override fun yesClick(dialog: MyDialog) {
                    val input:String =dialog.editText?.text.toString()
                    if (input==null||input .equals("")) {
                        Toast.makeText(activity, "台牌号不能为空！", Toast.LENGTH_LONG).show()
                    } else {
                        //此处写后续逻辑
                        dialog?.dismiss()
                    }
                }
            },true)
            myDialog.setOnDismissListener {
                //关闭监听逻辑
            }
            //显示的位置居中提高100dp-------------
            val w = myDialog.window
            val lp = w!!.attributes
            lp.x = 0
            lp.y = -100
            //-----------------------------------

            myDialog.show();
            //显示的宽高根据屏幕百分比调整-----------------------------------
            val m = activity!!.windowManager
            val d = m.defaultDisplay //为获取屏幕宽、高

            val p = myDialog.window!!.attributes //获取对话框当前的参数值

            p.height = (d.height * 0.40).toInt() //高度设置为屏幕的0.3

            p.width = (d.width * 0.45).toInt() //宽度设置为屏幕的0.5

            myDialog.window!!.attributes = p
            //--------------------------------------------------------------

下面加分割线的两段代码，其功能我已经写注释咯！