Android 底页 - 滚动问题

我需要底部纸张停在两个位置。我有以下底页代码。

<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:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    ....
</RelativeLayout>

<FrameLayout
    android:id="@+id/bottom_sheet"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:layout_behavior="android.support.design.widget.BottomSheetBehavior">
       <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/white"
                android:minHeight="1000dp"
                android:orientation="vertical">
                ....
            </LinearLayout>
      </ScrollView>
 </FrameLayout>

and

View bottomSheet = coordinatorLayout.findViewById(R.id.bottom_sheet);
    final BottomSheetBehavior behavior = BottomSheetBehavior.from(bottomSheet);
    behavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
        @Override
        public void onStateChanged(@NonNull View bottomSheet, int newState) {
            // React to state change
            Log.e("onStateChanged", "onStateChanged:" + newState);
            if (newState == BottomSheetBehavior.STATE_EXPANDED) {
                behavior.setPeekHeight(600);
                showAgain.setVisibility(View.GONE);
                mMap.getUiSettings().setScrollGesturesEnabled(false);
            } else if (newState == BottomSheetBehavior.STATE_COLLAPSED) {

                if (behavior.getPeekHeight() == 600) {
                    behavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
                    behavior.setPeekHeight(80);
                    mMap.getUiSettings().setScrollGesturesEnabled(false);
                } else if (behavior.getPeekHeight() == 80) {
                    showAgain.setVisibility(View.VISIBLE);
                    mMap.getUiSettings().setScrollGesturesEnabled(true);
                }

            }
        }

        @Override
        public void onSlide(@NonNull View bottomSheet, float slideOffset) {
            // React to dragging events
            Log.e("onSlide", "onSlide " + slideOffset);
        }
    });

    behavior.setPeekHeight(600);

除了一件事之外，这段代码工作正常。第一次我必须向上滚动底部表格，然后我可以向下滚动它。我无法直接向下滚动工作表。

任何帮助将不胜感激。

您可以使用而不是使用滚动视图嵌套滚动视图更好地与协调器布局确保使用应用程序：layout_behavior =“@ string / appbar_scrolling_view_behavior”用于在 NestedScrollView 内平滑滚动内容

mBottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
        @Override
        public void onStateChanged(@NonNull View bottomSheet, int newState) {
            if (newState == BottomSheetBehavior.STATE_COLLAPSED) {
                mBottomSheetBehavior.setPeekHeight(0);
            }
        }

        @Override
        public void onSlide(@NonNull View bottomSheet, float slideOffset) {
        }
    });

@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.btn_negetive: {
            mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
            mBottomSheetBehavior.setPeekHeight(Constants.PEEK_HEIGHT);
            mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
            break;
        }
        case R.id.btn_positive: {
            //some code
        }
    }
}

使用此链接上述解决方案对我有用：https://code.tutsplus.com/articles/how-to-use-bottom-sheets-with-the-design-support-library--cms-26031 https://code.tutsplus.com/articles/how-to-use-bottom-sheets-with-the-design-support-library--cms-26031