android - 底页横向问题

Question

在横向模式下显示底部工作表对话框时出现错误行为。该问题出现在 24.+ 版本的设计库中。 根据下图，底页仅在横向中未正确显示。我正在使用 BottomSheetDialog 类，并且正在学习本教程:http://www.skholingua.com/blog/bottom-sheet-android ，在我发布的应用程序中也会出现问题。

我测试了25.+版本，问题没有解决。

横向 24、25.+ 库中的错误

23.+ 库中的相同示例

主要 Activity

public class MainActivity extends AppCompatActivity {
CoordinatorLayout coordinatorLayout;
private BottomSheetBehavior<View> mBottomSheetBehavior;
private TextView textView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    coordinatorLayout = (CoordinatorLayout) findViewById(R.id.main_content);
    textView = (TextView) findViewById(R.id.textView);
    View bottomSheet = coordinatorLayout.findViewById(R.id.bottom_sheet);

    //For your bottom sheet to be displayable, you need to create a BottomSheetBehavior.
    //This is created by getting a reference to the container view and calling BottomSheetBehavior.from() on that container.
    mBottomSheetBehavior = BottomSheetBehavior.from(bottomSheet);

    mBottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
        @Override
        public void onStateChanged(@NonNull View bottomSheet, int newState) {
            switch (newState) {
                case BottomSheetBehavior.STATE_DRAGGING:
                    break;
                case BottomSheetBehavior.STATE_COLLAPSED:
                    mBottomSheetBehavior.setPeekHeight(0);
                    break;
                case BottomSheetBehavior.STATE_EXPANDED:
                    break;
                case BottomSheetBehavior.STATE_HIDDEN:
                    break;
                case BottomSheetBehavior.STATE_SETTLING:
                    break;
            }
        }

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

}


public void onClick(View v) {
    switch (v.getId()) {
        case R.id.button1:
            /**
             * For persistent bottom sheet to work, your layout should contain a coordinator layout,
             * and then in any child view of your coordinator layout, you can make it as a persistent bottom sheet
             * by adding a custom property app:layout_behavior and use behavior_peekHeight to define how much
             * of the Bottom Sheet you want visible.
             */
            textView.setText(R.string.dynamic_persistent_txt);
            mBottomSheetBehavior.setPeekHeight(300);
            mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
            break;
        case R.id.button2:
            /**
             * You can also display a Dialog in place of a View in the bottom sheet.
             * To do this, get the view from getLayoutInflater and pass it setContentView of the Dialog.
             */
            View view = getLayoutInflater().inflate(R.layout.bottom_sheet_layout, null);
            TextView textView = (TextView) view.findViewById(R.id.textView);
            textView.setText(R.string.dialog_modal_txt);
            BottomSheetDialog dialog = new BottomSheetDialog(this);
            dialog.setContentView(view);
            dialog.show();
            break;
        case R.id.button3:
            /**
             * You can also display a Fragment in place of a View in the bottom sheet.
             * To do this, you class that extends BottomSheetDialogFragment.
             */
            BottomSheetDialogFragment bottomSheetDialogFragment = new BottomSheetDialogFragmentExample();
            bottomSheetDialogFragment.show(getSupportFragmentManager(), bottomSheetDialogFragment.getTag());
            break;
    }
}

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

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingTop="24dp"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="onClick"
        android:text="Dynamic BottomSheet" />

    <Button
        android:id="@+id/button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="onClick"
        android:text="BottomSheetDialog" />

    <Button
        android:id="@+id/button3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="onClick"
        android:text="BottomSheetDialogFragment" />
</LinearLayout>

<LinearLayout
    android:id="@+id/bottom_sheet"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:elevation="4dp"
    android:minHeight="120dp"
    android:orientation="vertical"
    android:padding="@dimen/activity_vertical_margin"
    app:behavior_peekHeight="120dp"
    app:layout_behavior="android.support.design.widget.BottomSheetBehavior">

    <include layout="@layout/bottom_sheet_layout" />

</LinearLayout>

</android.support.design.widget.CoordinatorLayout>

bottom_sheet_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/CreamyGreen"
android:orientation="vertical">


<TextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/static_persistent_txt"
    android:padding="16dp"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:textColor="@android:color/white" />

<TextView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="16dp"
    android:text="@string/ipsum"
    android:textColor="@android:color/white"
    android:textSize="16sp" />
</LinearLayout>

Answer 1

这可以在 2 行中实现(Kotlin 版本)

class MyBottomSheetFragment : BottomSheetDialogFragment() {
    //....
    override fun onStart() {
        super.onStart()
        //this forces the sheet to appear at max height even on landscape
        val behavior = BottomSheetBehavior.from(requireView().parent as View)
        behavior.state = BottomSheetBehavior.STATE_EXPANDED
    }
}