Android BottomSheetDialogFragment没有完全扩展

android java android-support-library android-support-design bottom-sheet

2022-09-01 11:13:26

我有以下测试底表实现。

当我将peekHeight设置为小于500的值时，它有效。经过一些值后，透视高度的任何增加都不会改变底部工作表的扩展方式。它只是留在那里，只能手动拖动。我们如何以编程方式设置透视高度，以确保底部工作表自动扩展到透视高度。

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);
    }
}

答案 1

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();
        }
    });

答案 2

我找到了另一个解决方案。也许对于未来的读者来说，它可能是有用的。

@Override
public void setupDialog(Dialog dialog, int style) {
    super.setupDialog(dialog, style);
    final View root = View.inflate(getContext(), R.layout.fragment_bottom_sheet_choose_time, null);
    dialog.setContentView(root);
    initView(root);

    CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) ((View) root.getParent()).getLayoutParams();
    CoordinatorLayout.Behavior behavior = params.getBehavior();

    if (behavior != null && behavior instanceof BottomSheetBehavior) {
        mBottomSheetBehavior = (BottomSheetBehavior) behavior;
        mBottomSheetBehavior.setBottomSheetCallback(mBottomSheetBehaviorCallback);

        root.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                root.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                int height = root.getMeasuredHeight();
                mBottomSheetBehavior.setPeekHeight(height);
            }
        });
    }
}

正如@Anthonyeef提到的，这里的目的是在真正测量视图并删除视图以获得更好的性能后获得确切的测量高度。ViewTreeObserverGlobalOnLayoutListener

但是，在生产中使用之前，请在不同的设备和屏幕上测试此解决方案，因为如果底页中的内容高于屏幕，则会产生一些奇怪的滑动行为。