Android 用DialogFragment自定义Dialog

1.代码

class NotifyAlertDlg (var callback : ((dlg : NotifyAlertDlg) -> Unit)? = null): DialogFragment() {

    lateinit var binding : NotifyAlertBinding

    fun initBinding(){
        binding.notifyDlgClose.setOnClickListener(this::onCloseClicked)
        binding.notifyAlertOk.setOnClickListener(this::onOpenClicked)
    }
    fun onCloseClicked(v : View){
        dialog?.dismiss()
    }
    fun onOpenClicked(v : View){
        callback?.invoke(this)
    }

    override fun show(transaction: FragmentTransaction, tag: String?): Int {
        return super.show(transaction, tag)
    }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        binding = NotifyAlertBinding.inflate(inflater,container,false)
        initBinding()
        return binding.root
    }

    override fun onActivityCreated(savedInstanceState: Bundle?) {
        super.onActivityCreated(savedInstanceState)
    }

    override fun onStart() {
        context?.let {
            initDialog(it)
        }
        super.onStart()
    }
    fun initDialog(context: Context){
        dialog?.apply {
            setCancelable(true)             //取消
            setCanceledOnTouchOutside(true) //点击外部不消失的方法

        }
        val window = dialog?.window?.apply {
            setBackgroundDrawableResource(R.color.transparent)      //如果不设置背景，有白色的直角边。
            decorView.setPadding(32,0,32,0) //设置背景后，在layout中的margin失效，在这里设置
        }
        if(window == null){
            return
        }
        val params = window.attributes.apply {
            width = (window.windowManager.defaultDisplay.width * 0.91f).toInt()//按比例显示
            height = WRAP_CONTENT
            gravity = Gravity.CENTER
            dimAmount = 0.3f            //设置Dialog弹出时背景的透明度
            horizontalMargin = 0f       //设置Dialog水平方向的间距
            verticalMargin = 0f         //设置Dialog垂直方向的间距
//            verticalWeight = 0.5f
//            horizontalWeight = 0.5f
            x = 0                       //设置Dialog显示时X轴的坐标,具体屏幕X轴的偏移量
            y = 0                       //设置Dialog显示时Y轴的坐标,距离屏幕Y轴的偏移量
            alpha = 1f                  //设置Dialog的透明度
            windowAnimations = 0        //设置Dialog显示和消失时的动画

        }
        window.attributes = params as WindowManager.LayoutParams?
    }
}

2.dialog的布局

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_gravity="center"
    android:background="@drawable/notify_bg"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/notify_dlg_close"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:padding="16dp"
        app:layout_constraintBottom_toTopOf="@+id/notify_dlg_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_chainStyle="packed"
        app:srcCompat="@mipmap/close" />

    <TextView
        android:id="@+id/notify_dlg_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="通知栏未打开"
        android:textColor="#353535"
        android:textSize="20sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toTopOf="@+id/notify_dlg_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/notify_dlg_close" />

    <View
        android:id="@+id/bottom_line"
        android:layout_width="0dp"
        android:layout_height="2px"
        android:background="@color/textNoFocus"
        app:layout_constraintBottom_toTopOf="@+id/notify_alert_ok"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/notify_alert_icon" />

    <TextView
        android:id="@+id/notify_dlg_content"
        android:layout_width="0dp"
        android:layout_height="72dp"
        android:layout_marginStart="16dp"
        android:layout_marginTop="16dp"
        android:layout_marginEnd="16dp"
        android:gravity="center"
        android:text="通知栏可展示完整的警报功能，\n\n是否现在打开？"
        android:textColor="#3a3a3a"
        app:layout_constraintBottom_toTopOf="@+id/notify_alert_icon"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/notify_dlg_close" />

    <TextView
        android:id="@+id/notify_alert_ok"
        android:layout_width="0dp"
        android:layout_height="64dp"
        android:gravity="center"
        android:text="去打开"
        android:textColor="@color/notify_txt"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/bottom_line" />

    <ImageView
        android:id="@+id/notify_alert_icon"
        android:layout_width="72dp"
        android:layout_height="72dp"
        android:layout_marginTop="16dp"
        android:layout_marginBottom="16dp"
        app:layout_constraintBottom_toTopOf="@+id/bottom_line"
        app:layout_constraintDimensionRatio="1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/notify_dlg_content"
        app:srcCompat="@drawable/ic_notify_toast" />

</androidx.constraintlayout.widget.ConstraintLayout>

3.使用

    fun notifyToast(){
        val dlg = NotifyAlertDlg().apply { callback = this@SettingFrgmt::onDialogClicked }
        dlg.show(requireFragmentManager(),"NotifyDlg")
    }