相关疑难解决方法(0)

我想显示一个比屏幕宽度宽的底部对话框.

例如,Nexus 9上的Google Play音乐分享选项.

你知道如何实现这个目标吗？

现在我刚刚尝试减少工作表内容的宽度,但背景仍然在屏幕宽度并显示白色背景.

一些代码:

的build.gradle

compile 'com.android.support:design:23.3.0'

主要活动

@Override
protected void onCreate(Bundle savedInstanceState) {
    ...

    mBottomSheetDialog = new BottomSheetDialog(this);
    mBottomSheetDialog.setContentView(R.layout.sheet_test);
    mBottomSheetDialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
        @Override
        public void onDismiss(DialogInterface dialog) {
            mBottomSheetDialog = null;
        }
    });
    mBottomSheetDialog.show();
}

sheet_test

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="100dp"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            style="@style/TextAppearance.AppCompat.Body1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="16dp"
            android:text="Some Text"
            android:textColor="@color/colorPrimary" />

        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#ddd" />

        <TextView
            style="@style/TextAppearance.AppCompat.Body1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_margin="16dp"
            android:text="Some Text" />

        <View
            android:layout_width="match_parent"
            android:layout_height="1dp"
            android:background="#ddd" />

    </LinearLayout> …

我正在尝试制作透明的底部页面布局,这样我就可以看到它下方视图的内容.底部工作表按预期工作,但是当我将背景设置为@null或时@android:color/transparent,布局的视图是白色的,而不是透明的.我的布局如下:

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>

带有id的线性布局bottom_sheet,就是我的底页.表单本身定义如下:

<?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" …