Android: BottomSheetDialog 没有用 ConstraintLayout 完全展开

Question

我正在使用 ConstraintLayout 作为我的布局。我正在创建一个 BottomSheetDialog 并为其设置布局，它在顶部使用 ConstraintLayout。

Note: If i use LinearLayout everything works fine and BottomSheetDialog takes proper height but when i am using ConstraintLayout, it shows only one option.

请看下面我使用ConstraintLayout时的截图：

我的 xml 文件：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@color/white">

    <TextView
        android:id="@+id/tv_other_methods"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/ripple"
        android:gravity="center_horizontal"
        android:padding="@dimen/dp_12"
        android:text="@string/from_other_methods"
        android:textColor="@color/blue"
        android:textSize="@dimen/sp_17" />

    <View
        android:id="@+id/view_other_methods"
        android:layout_width="match_parent"
        android:layout_height="@dimen/dip_1"
        android:background="@color/light_grey"
        app:layout_constraintBottom_toBottomOf="@id/tv_other_methods" />

    <TextView
        android:id="@+id/tv_FromChinaUnionPay"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/ripple"
        android:gravity="center_horizontal"
        android:padding="@dimen/dp_12"
        android:text="@string/from_china_union_pay"
        android:textColor="@color/blue"
        android:textSize="@dimen/sp_17"
        app:layout_constraintBottom_toBottomOf="@id/view_other_methods"
        app:layout_constraintTop_toTopOf="@id/view_FromChinaUnionPay" />

    <View
        android:id="@+id/view_FromChinaUnionPay"
        android:layout_width="match_parent"
        android:layout_height="@dimen/dip_1"
        android:background="@color/light_grey"
        app:layout_constraintBottom_toBottomOf="@id/tv_FromChinaUnionPay" />

    <TextView
        android:id="@+id/tv_Cancel"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/ripple"
        android:gravity="center_horizontal"
        android:padding="@dimen/dp_12"
        android:text="@string/cancel"
        android:textColor="@color/blue"
        android:textSize="@dimen/sp_17"
        app:layout_constraintTop_toBottomOf="@+id/view_FromChinaUnionPay" />
</android.support.constraint.ConstraintLayout>

我的 java BottomSheetDialog 代码：

final BottomSheetDialog bottomSheetDialog = new BottomSheetDialog(mContext);
            bottomSheetDialog.setContentView(R.layout.dialog_web_view_options);
            // dialog.setCancelable(false);
            final Window window = bottomSheetDialog.getWindow();
            assert window != null;
            window.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
            window.setLayout(ActionBar.LayoutParams.MATCH_PARENT, ActionBar.LayoutParams.WRAP_CONTENT);
            window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
            window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);
            window.getDecorView().setPadding(20, 0, 20, 0);

            bottomSheetDialog.setOnShowListener(new DialogInterface.OnShowListener() {
                @Override
                public void onShow(DialogInterface dialog) {
                    FrameLayout bottomSheet = bottomSheetDialog.findViewById(android.support.design.R.id.design_bottom_sheet);
                    BottomSheetBehavior behavior = BottomSheetBehavior.from(bottomSheet);
                    behavior.setSkipCollapsed(true);
                    behavior.setState(BottomSheetBehavior.STATE_EXPANDED);
                }
            });

在我的布局中，如果我将ConstraintLayout 替换为LinearLayout，那么它可以正常工作并占据全高。如果我做错了什么，请告诉我。

我已经尝试了这些解决方案，但没有任何效果：

BottomSheetDialogFragment - How to set expanded height (or min top offset)

如有任何帮助，我们将不胜感激。谢谢！

Answer 1

您没有限制所有视图 - 第一个 TextView 没有任何限制。您添加的约束没有正确指定以正确显示垂直顺序的视图。我建议创建所有视图的垂直链，并将父 ConstraintLayout's layout_height 设置为 wrap_content。 XML 应该看起来像这样：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/white">

    <TextView
        android:id="@+id/tv_other_methods"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:background="@drawable/ripple"
        android:gravity="center_horizontal"
        android:padding="@dimen/dp_12"
        android:text="@string/from_other_methods"
        android:textColor="@color/blue"
        android:textSize="@dimen/sp_17"
        app:layout_constraintBottom_toTopmOf="@id/view_other_methods"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <View
        android:id="@+id/view_other_methods"
        android:layout_width="0dp"
        android:layout_height="@dimen/dip_1"
        android:background="@color/light_grey"
        app:layout_constraintBottom_toTopOf="@id/tv_FromChinaUnionPay"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/tv_other_methods" />

    <TextView
        android:id="@+id/tv_FromChinaUnionPay"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:background="@drawable/ripple"
        android:gravity="center_horizontal"
        android:padding="@dimen/dp_12"
        android:text="@string/from_china_union_pay"
        android:textColor="@color/blue"
        android:textSize="@dimen/sp_17"
        app:layout_constraintBottom_toTopOf="@id/view_FromChinaUnionPay"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/view_other_methods" />

    <View
        android:id="@+id/view_FromChinaUnionPay"
        android:layout_width="0dp"
        android:layout_height="@dimen/dip_1"
        android:background="@color/light_grey"
        app:layout_constraintBottom_toTopOf="@id/tv_Cancel"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/tv_FromChinaUnionPay" />

    <TextView
        android:id="@+id/tv_Cancel"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:background="@drawable/ripple"
        android:gravity="center_horizontal"
        android:padding="@dimen/dp_12"
        android:text="@string/cancel"
        android:textColor="@color/blue"
        android:textSize="@dimen/sp_17"
        app:layout_constraintTop_toBottomOf="@+id/view_FromChinaUnionPay"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"/>
</android.support.constraint.ConstraintLayout>

作为旁注，不建议对 ConstraintLayout 内的任何视图使用 match_parent，如文档所建议的：

Important: MATCH_PARENT is not recommended for widgets contained in a ConstraintLayout. Similar behavior can be defined by using MATCH_CONSTRAINT with the corresponding left/right or top/bottom constraints being set to "parent".

Android: BottomSheetDialog 没有用 ConstraintLayout 完全展开

Android: BottomSheetDialog does not expand completely with ConstraintLayout

android

android-constraintlayout