Dialog 自定义布局

写个底部弹窗

继承Dialog，初始化时调用setContentView()设置布局。

class CustomDialog(context: Context) : Dialog(context, R.style.bottom_dialog) {
    init {
        setContentView(R.layout.dialog_custom)

        setBottom()
    }
}

DialogKtx

fun Dialog.setCommon() {
    window?.run {
        val params = attributes
        params.gravity = Gravity.CENTER
        attributes = params
    }
}

fun Dialog.setBottom() {
    window?.run {
        decorView.setPadding(0, 0, 0, 0)
        val params = attributes
        params.height = ViewGroup.LayoutParams.WRAP_CONTENT
        params.width = ViewGroup.LayoutParams.MATCH_PARENT
        params.gravity = Gravity.BOTTOM
        attributes = params
    }
}

style.xml

    <!-- CommonDialog -->
    <style name="common_dialog" parent="@android:style/Theme.Dialog">
        <!-- 无边框 -->
        <item name="android:windowFrame">@null</item>
        <!-- 是否浮现在activity之上 -->
        <item name="android:windowIsFloating">true</item>
        <!-- 是否透明 -->
        <item name="android:windowIsTranslucent">true</item>
        <!-- 是否去除标题 -->
        <item name="android:windowNoTitle">true</item>
        <!-- 背景 -->
        <item name="android:background">@android:color/transparent</item>
        <!-- 背景透明 -->
        <item name="android:windowBackground">@android:color/transparent</item>
        <!-- 是否模糊 -->
        <item name="android:backgroundDimEnabled">true</item>
        <!-- 遮罩层 -->
        <item name="android:backgroundDimAmount">0.5</item>
    </style>

    <!-- BottomDialog动画 -->
    <style name="bottom_animation" parent="android:Animation">
        <item name="android:windowEnterAnimation">@anim/dialog_enter</item>
        <item name="android:windowExitAnimation">@anim/dialog_exit</item>
    </style>

    <!-- BottomDialog -->
    <style name="bottom_dialog" parent="@style/common_dialog">
        <item name="android:windowAnimationStyle">@style/bottom_animation</item>
    </style>

dialog_enter.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">

    <translate
        android:duration="300"
        android:fromYDelta="100%"
        android:toYDelta="0%" />
</set>

dialog_exit.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">

    <translate
        android:duration="300"
        android:fromYDelta="0%"
        android:toYDelta="100%" />
</set>