kotlin自定义对话框的具体实现代码

创建我们自己的对话框,继承于系统的Dialog 实现构造方法

class CommonDialog(context: Context?, themeResId: Int) : Dialog(context, themeResId) {}

2. 在内部创建BUilder类 定义出我们需要的方法和属性

class Builder (private val context: Context) {
    private var title: String? = null
    private var message: String? = null
    private var positiveButtonContent: String? = null
    private var negativeButtonContent: String? = null
    private var positiveButtonListener: ? = null
    private var negativeButtonListener: ? = null
    private var contentView: View? = null
    private var imageid: Int = 0
    private var color: Int = 0
    private var withOffSize: Float = ()
    private var heightOffSize: Float = ()
 
 
    fun setTitle(title: String): Builder {
      this.title = title
      return this
    }
 
 
    fun setTitle(title: Int): Builder {
      this.title = context.getText(title) as String
      return this
    }
 
    fun setMessage(message: String): Builder {
      this.message = message
      return this
    }
 
    fun setMessageColor(color: Int): Builder {
      this.color = color
      return this
    }
 
    fun setImageHeader(Imageid: Int): Builder {
 
      this.imageid = Imageid
      return this
    }
 
 
    fun setPositiveButton(text: String, listener: ): Builder {
      this.positiveButtonContent = text
      this.positiveButtonListener = listener
      return this
    }
 
    fun setPositiveButton(textId: Int, listener: ): Builder {
      this.positiveButtonContent = context.getText(textId) as String
      this.positiveButtonListener = listener
      return this
    }
 
    fun setNegativeButton(text: String, listener: ): Builder {
      this.negativeButtonContent = text
      this.negativeButtonListener = listener
      return this
    }
 
    fun setNegativeButton(textId: Int, listener: ): Builder {
      this.negativeButtonContent = context.getText(textId) as String
      this.negativeButtonListener = listener
      return this
    }
 
    fun setContentView(v: View): Builder {
      this.contentView = v
      return this
    }
 
    fun setWith(v: Float): Builder {
      this.withOffSize = v
      return this
    }
 
    fun setContentView(v: Float): Builder {
      this.heightOffSize = v
      return this
    }
 
    fun create(): CommonDialog {
      /**
       * 利用我们刚才自定义的样式初始化Dialog
       */
      val dialog = CommonDialog(context,
          )
      /**
       * 下面就初始化Dialog的布局页面
       */
      val inflater = context
          .getSystemService() as LayoutInflater
      val dialogLayoutView = (R.layout.dialog_layout,
          null)
      (dialogLayoutView, (
          .WRAP_CONTENT, .WRAP_CONTENT))
 
      if (imageid != 0) {
        (() as ImageView)
            .setImageResource(imageid)
      } else {
        (() as ImageView).visibility = 
      }
 
      if (!(title)) {
        (() as TextView).text = title
      } else {
        // (().toString(), "未设置对话框标题！");
      }
 
      if (color != 0) {
        val viewById = () as TextView
        viewById.setTextColor(color)
      }
 
      if (!(message)) {
        (() as TextView).text = message
      } else if (contentView != null) {
        (dialogLayoutView
            .findViewById<View>() as LinearLayout)
            .removeAllViews()
        (dialogLayoutView
            .findViewById<View>() as LinearLayout).addView(
            contentView, (
            .WRAP_CONTENT,
            .WRAP_CONTENT))
      } else {
        (() as TextView).visibility = 
      }
 
      if (!(positiveButtonContent)) {
        (() as TextView).text = positiveButtonContent
        if (positiveButtonListener != null) {
          (() as TextView)
              .setOnClickListener { positiveButtonListener!!.onClick(dialog, -1) }
 
        }
      } else {
        (() as TextView).visibility = 
        ().visibility = 
      }
 
      if (!(negativeButtonContent)) {
        (() as TextView).text = negativeButtonContent
        if (negativeButtonListener != null) {
          (dialogLayoutView
              .findViewById<View>() as TextView)
              .setOnClickListener { negativeButtonListener!!.onClick(dialog, -2) }
        }
      } else {
        (() as TextView).visibility = 
      }
      /**
       * 将初始化完整的布局添加到dialog中
       */
      (dialogLayoutView)
      /**
       * 禁止点击Dialog以外的区域时Dialog消失
       */
      (false)
 
 
      val window = dialog.window
      val context = this.context as Activity
      val windowManager = context.windowManager
 
      val defaultDisplay = windowManager.defaultDisplay
 
      val attributes = window!!.attributes
 
      if (() != ) {
 
        attributes.width = ( * withOffSize).toInt()
      } else {
        attributes.width = ( * ).toInt()
 
      }
      if (() != ) {
 
        attributes.height = ( * heightOffSize).toInt()
      }
      window.attributes = attributes
      return dialog
    }
  }

3.在需要的地方使用

(this).
        setImageHeader()
        .setTitle("你是否要注销账户")
        .setMessage("注销后需重新注册才能使用牛返返优惠")
        .setPositiveButton("确定注销",  { p0, p1 ->
          p0?.dismiss()
          DestroyAccount()
        })
        .setNegativeButton("取消",  { p0, p1 -> p0?.dismiss() })
        .setWith(f)
        .create()
        .show()

实现效果：