Android中的透明底部布局 [英] Transparent bottom sheet layout in Android

问题描述

我正在尝试制作一个透明的底部工作表布局，这将使我能够看到其下方视图的内容.底部工作正常，但是当我将背景设置为@null或@android:color/transparent时，布局的视图为白色，而不是透明的.我的布局如下:

I am trying to make a transparent bottom sheet layout, that would allow me to see the contents of the view below it. The bottom sheet is working as expected, however when I set the background to either @null or @android:color/transparent, the layout's view is white, as opposed to transparent. My layout is as follows:

app_bar_main.xml:

app_bar_main.xml:

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/coordinatorLayout"
    android:background="@android:color/transparent"
    android:fitsSystemWindows="true"
    tools:context=".core.activities.MainActivity">
    <!-- stuff here -->
    <LinearLayout
        android:id="@+id/bottom_sheet"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:background="@null"
        android:orientation="vertical"
        app:layout_behavior="@string/bottom_sheet_behavior">
    </LinearLayout>

</android.support.design.widget.CoordinatorLayout>

id为bottom_sheet的线性布局适合我的底页.工作表本身定义如下:

The linear layout with id bottom_sheet holds, well, my bottom sheet. The sheet itself is defined as follows:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:background="@null"
    android:layout_height="match_parent">
    <LinearLayout android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@null"
        android:orientation="vertical">

        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/bottom_sheet_placeholder_layout"
            android:layout_weight="0.6"
            android:layout_width="match_parent"
            android:background="@null"
            android:layout_height="50dp"
            android:orientation="horizontal">
        </LinearLayout>
        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/bottom_sheet_layout"
            android:layout_margin="0dp"
            android:layout_weight="0.4"
            android:layout_width="match_parent"
            android:background="@color/my_background"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <ProgressBar
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:id="@+id/my_progress_bar" />

            <TextView
                android:layout_marginTop="5dp"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceLarge"
                android:text="Large Text"
                android:textColor="@color/my_text"
                android:id="@+id/txt_my_info"
                android:layout_gravity="center_horizontal"
                android:visibility="gone"
                android:textSize="48px" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="Medium Text"
                android:id="@+id/txt_my_address"
                android:textColor="@color/my_secondary_text"
                android:visibility="gone"
                android:layout_gravity="center_horizontal" />
        </LinearLayout>
    </LinearLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/btn_edit_tree_info"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:layout_marginTop="-62dp"
        android:elevation="100dp"
        android:src="@drawable/ic_create_black_24dp"
        app:layout_anchor="@id/bottom_sheet_layout"
        app:layout_anchorGravity="top|end|right"
        app:useCompatPadding="true"/>
</android.support.design.widget.CoordinatorLayout>

推荐答案

答案要容易得多:只需添加此行

The answer is much more easier: just add this line

myDialog .getWindow() .findViewById(R.id.design_bottom_sheet) .setBackgroundResource(android.R.color.transparent);

myDialog .getWindow() .findViewById(R.id.design_bottom_sheet) .setBackgroundResource(android.R.color.transparent);

也不要更改标准ID(R.id.design_bottom_sheet和android.R.color.transparent).它使底部工作表"对话框的背景透明

And don't change standard ids (R.id.design_bottom_sheet and android.R.color.transparent). It makes background of Bottom Sheet Dialog transparent

这篇关于Android中的透明底部布局的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！