Android BottomSheetDialogFragment 没有完全展开

Question

我有以下测试底表实现。

当我将 peekHeight 设置为小于 500 的值时，它起作用了。在某个值之后，任何 peek 高度的增加都不会改变底部工作表的展开方式。它只是保留在那里只能手动拖动。我们如何以编程方式设置 peekHeight 以确保底部工作表自动扩展到 peek 高度。

bottom_sheet_dialog_main

 <?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:id="@+id/locUXCoordinatorLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <LinearLayout
        android:id="@+id/locUXView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fitsSystemWindows="true"
        android:orientation="vertical"
        app:behavior_hideable="false"
        app:behavior_peekHeight="0dp"
        app:layout_behavior="@string/bottom_sheet_behavior">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="1 Value" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="2 Value" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="3 Value" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="4 Value" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="5 Value" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="6 Value" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="7 Value" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="8 Value" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="9 Value" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="First Value" />
    </LinearLayout>
</android.support.design.widget.CoordinatorLayout>

Java代码

public class MyBottomSheetDialogFragment extends BottomSheetDialogFragment {

    private static BottomSheetBehavior bottomSheetBehavior;
    private static View bottomSheetInternal;
    private static MyBottomSheetDialogFragment INSTANCE;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        getDialog().setOnShowListener(new DialogInterface.OnShowListener() {
            @Override
            public void onShow(DialogInterface dialog) {
                BottomSheetDialog d = (BottomSheetDialog) dialog;
                CoordinatorLayout coordinatorLayout = (CoordinatorLayout)d.findViewById(R.id.locUXCoordinatorLayout);
                bottomSheetInternal = d.findViewById(R.id.locUXView);
                bottomSheetBehavior = BottomSheetBehavior.from(bottomSheetInternal);
                bottomSheetBehavior.setPeekHeight(bottomSheetInternal.getHeight());
                bottomSheetInternal.requestLayout();
                coordinatorLayout.getLayoutParams().height = bottomSheetInternal.getHeight();
                Toast.makeText(getActivity(), "Height is" + bottomSheetInternal.getHeight() + "  " + coordinatorLayout.getLayoutParams().height, Toast.LENGTH_LONG).show();

            }
        });
        INSTANCE = this;
        return inflater.inflate(R.layout.bottom_sheet_dialog_main, container, false);
    }
}

原文由 Nandish A 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

通过更深入的 UI 检查，我们发现还有另一个 CoordinatorLayout 包装了我们的协调器布局。 The parent CoordinatorLayout has a FrameLayout with a BottomSheetBehavior with the id design_bottom_sheet .由于 match_parent 的高度 FrameLayout 的 id design_bottom_sheet --- 的高度受到限制

通过使用 id design_bottom_sheet 设置 FrameLayout 的 peek 高度，解决了这个问题

    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    getDialog().setOnShowListener(new DialogInterface.OnShowListener() {
        @Override
        public void onShow(DialogInterface dialog) {
            BottomSheetDialog d = (BottomSheetDialog) dialog;
            coordinatorLayout = (CoordinatorLayout) d.findViewById(R.id.locUXCoordinatorLayout);
            bottomSheetInternal = d.findViewById(R.id.locUXView);
            bottomSheetBehavior = BottomSheetBehavior.from(bottomSheetInternal);
            bottomSheetBehavior.setHidable(false);
            BottomSheetBehavior.from((View)coordinatorLayout.getParent()).setPeekHeight(bottomSheetInternal.getHeight());
            bottomSheetBehavior.setPeekHeight(bottomSheetInternal.getHeight());
            coordinatorLayout.getParent().requestLayout();

        }
    });

原文由 Nandish A 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

在 onCreateView 中使用此代码。

 getDialog().setOnShowListener(new DialogInterface.OnShowListener() {
        @Override
        public void onShow(DialogInterface dialog) {
            BottomSheetDialog d = (BottomSheetDialog) dialog;
            FrameLayout bottomSheet = (FrameLayout) d.findViewById(R.id.design_bottom_sheet);
            CoordinatorLayout coordinatorLayout = (CoordinatorLayout) bottomSheet.getParent();
            BottomSheetBehavior bottomSheetBehavior = BottomSheetBehavior.from(bottomSheet);
            bottomSheetBehavior.setPeekHeight(bottomSheet.getHeight());
            coordinatorLayout.getParent().requestLayout();
        }
    });

原文由 athysirus 发布，翻译遵循 CC BY-SA 3.0 许可协议