怎么在kotlin中利用建造者模式自定义一个对话框？很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。
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1.CommonDialog 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: DialogInterface.OnClickListener? = null
private var negativeButtonListener: DialogInterface.OnClickListener? = null
private var contentView: View? = null
private var imageid: Int = 0
private var color: Int = 0
private var withOffSize: Float = 0.toFloat()
private var heightOffSize: Float = 0.toFloat()
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: DialogInterface.OnClickListener): Builder {
this.positiveButtonContent = text
this.positiveButtonListener = listener
return this
}
fun setPositiveButton(textId: Int, listener: DialogInterface.OnClickListener): Builder {
this.positiveButtonContent = context.getText(textId) as String
this.positiveButtonListener = listener
return this
}
fun setNegativeButton(text: String, listener: DialogInterface.OnClickListener): Builder {
this.negativeButtonContent = text
this.negativeButtonListener = listener
return this
}
fun setNegativeButton(textId: Int, listener: DialogInterface.OnClickListener): 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,
R.style.dialogStyle)
/**
* 下面就初始化Dialog的布局页面
*/
val inflater = context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
val dialogLayoutView = inflater.inflate(R.layout.dialog_layout,
null)
dialog.addContentView(dialogLayoutView, ViewGroup.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT))
if (imageid != 0) {
(dialogLayoutView.findViewById(R.id.iv_image_header) as ImageView)
.setImageResource(imageid)
} else {
(dialogLayoutView.findViewById(R.id.iv_image_header) as ImageView).visibility = View.GONE
}
if (!TextUtils.isEmpty(title)) {
(dialogLayoutView.findViewById(R.id.tv_dialog_title) as TextView).text = title
} else {
// Log.w(context.getClass().toString(), "未设置对话框标题！");
}
if (color != 0) {
val viewById = dialogLayoutView.findViewById(R.id.dialog_content) as TextView
viewById.setTextColor(color)
}
if (!TextUtils.isEmpty(message)) {
(dialogLayoutView.findViewById(R.id.dialog_content) as TextView).text = message
} else if (contentView != null) {
(dialogLayoutView
.findViewById(R.id.dialog_llyout_content) as LinearLayout)
.removeAllViews()
(dialogLayoutView
.findViewById(R.id.dialog_llyout_content) as LinearLayout).addView(
contentView, ViewGroup.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT))
} else {
(dialogLayoutView.findViewById(R.id.dialog_content) as TextView).visibility = View.INVISIBLE
}
if (!TextUtils.isEmpty(positiveButtonContent)) {
(dialogLayoutView.findViewById(R.id.tv_dialog_pos) as TextView).text = positiveButtonContent
if (positiveButtonListener != null) {
(dialog.findViewById(R.id.tv_dialog_pos) as TextView)
.setOnClickListener { positiveButtonListener!!.onClick(dialog, -1) }
}
} else {
(dialogLayoutView.findViewById(R.id.tv_dialog_pos) as TextView).visibility = View.GONE
dialogLayoutView.findViewById(R.id.line).visibility = View.GONE
}
if (!TextUtils.isEmpty(negativeButtonContent)) {
(dialogLayoutView.findViewById(R.id.tv_dialog_neg) as TextView).text = negativeButtonContent
if (negativeButtonListener != null) {
(dialogLayoutView
.findViewById(R.id.tv_dialog_neg) as TextView)
.setOnClickListener { negativeButtonListener!!.onClick(dialog, -2) }
}
} else {
(dialogLayoutView.findViewById(R.id.tv_dialog_neg) as TextView).visibility = View.GONE
}
/**
* 将初始化完整的布局添加到dialog中
*/
dialog.setContentView(dialogLayoutView)
/**
* 禁止点击Dialog以外的区域时Dialog消失
*/
dialog.setCanceledOnTouchOutside(false)
val window = dialog.window
val context = this.context as Activity
val windowManager = context.windowManager
val defaultDisplay = windowManager.defaultDisplay
val attributes = window!!.attributes
if (withOffSize.toDouble() != 0.0) {
attributes.width = (defaultDisplay.width * withOffSize).toInt()
} else {
attributes.width = (defaultDisplay.width * 0.77).toInt()
}
if (heightOffSize.toDouble() != 0.0) {
attributes.height = (defaultDisplay.height * heightOffSize).toInt()
}
window.attributes = attributes
return dialog
}
} 3.在需要的地方使用
CommonDialog.Builder(this).
setImageHeader(R.mipmap.icon_gantan_tankuang)
.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", DialogInterface.OnClickListener { p0, p1 ->
p0?.dismiss()
DestroyAccount()
})
.setNegativeButton("取消", DialogInterface.OnClickListener { p0, p1 -> p0?.dismiss() })
.setWith(0.77f)
.create()
.show()看完上述内容是否对您有帮助呢？如果还想对相关知识有进一步的了解或阅读更多相关文章，请关注创新互联行业资讯频道，感谢您对创新互联的支持。
