Android 底页景观问题

在横向模式下显示底部工作表对话框时出现错误行为。该问题发生在24.+版本的设计库中。 根据下图，仅在横向中，底部板材未正确显示。我正在使用BottomSheetDialog类，我正在遵循本教程：，在我发布的应用程序中，问题也会出现

我测试了25.+版本，但问题没有解决

横向24、25+库中的错误

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;
    }
}

23.+库中的相同示例

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;
    }
}

主要活动

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;
    }
}

public类MainActivity扩展了AppCompatActivity{
协调布局协调布局；
私人银行行为mBottomSheetBehavior；
私有文本视图文本视图；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
coordinatorLayout=（coordinatorLayout）findViewById（R.id.main_内容）；
textView=（textView）findViewById（R.id.textView）；
视图底部工作表=坐标布局。findViewById（R.id.底部工作表）；
//要使底部工作表可显示，需要创建底部工作表行为。
//这是通过获取对容器视图的引用并调用该容器上的BottomSheetBehavior.from（）创建的。
mBottomSheetBehavior=底部板材行为。从（底部板材）；
mBottomSheetBehavior.setBottomSheetCallback（新的BottomSheetBehavior.BottomSheetCallback（）{
@凌驾
公共void onStateChanged（@NonNull View bottomSheet，int newState）{
交换机（新闻状态）{
case BottomSheetBehavior.STATE_拖动：
打破
case BottomSheetBehavior.STATE_已崩溃：
mBottomSheetBehavior.setpeek高度（0）；
打破
case BottomSheetBehavior.STATE_已展开：
打破
case BottomSheetBehavior.STATE_隐藏：
打破
case.STATE_结算：
打破
}
}
@凌驾
幻灯片上的公共空白（@NonNull视图底页，浮动幻灯片偏移）{
}
});
}
公共void onClick（视图v）{
开关（v.getId（））{
案例R.id.button1：
/**
*要使持久的底部工作表正常工作，您的布局应包含一个协调器布局，
*然后在协调器布局的任何子视图中，都可以将其作为持久的底部工作表
*通过添加自定义属性app:layout_behavior并使用behavior_peek height定义值
*要显示的底部图纸的。
*/
textView.setText（R.string.dynamic\u persistent\u txt）；
mBottomSheetBehavior.setpeek高度（300）；
mBottomSheetBehavior.setState（底部表单行为.STATE_扩展）；
打破
案例R.id.按钮2：
/**
*也可以在底部图纸中显示对话框来代替视图。
*为此，从GetLayoutFlater获取视图，并将其传递给对话框的setContentView。
*/
视图=GetLayoutFlater（）。充气（R.layout.bottom\u sheet\u layout，null）；
TextView TextView=（TextView）view.findViewById（R.id.TextView）；
textView.setText（R.string.dialog\u modal\u txt）；
BottomSheetDialog=新建BottomSheetDialog（此）；
setContentView（视图）；
dialog.show（）；
打破
外壳R.id.按钮3：
/**
*也可以在底部图纸中显示片段以代替视图。
*要做到这一点，您需要扩展BottomSheetDialogFragment的类。
*/
BottomSheetDialogFragment BottomSheetDialogFragment=新的BottomSheetDialogFragmentExample（）；
show（getSupportFragmentManager（），bottomSheetDialogFragment.getTag（））；
打破
}
}

活动\u 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>

<?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>

底部工作表布局.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>

<?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>

这是一种变通方法。（注意：此代码在活动中）

---

谷歌的家伙们按计划完成了这项工作，这里有一个解决办法

屏幕高度比有一个神奇的常数，它似乎是最小值（实际宽度，最大宽度），这显然不起作用 因此，使用手机景观，可以将其覆盖到更大的范围

<style name="Theme.Main.Reader">
     ...
     <item name="bottomSheetDialogTheme">@style/ReaderBottomSheelDialog</item>
</style>
<style name="ReaderBottomSheelDialog" parent="Theme.Design.BottomSheetDialog">
     <item name="bottomSheetStyle">@style/BottomSheetStyle</item>
</style>

<style name="BottomSheetStyle" parent="Widget.Design.BottomSheet.Modal">
    <item name="behavior_peekHeight">512dp</item>
</style>

...
@样式/读卡器底部样式表
@样式/底片样式
512dp

要使BottomSheetDialogFragment始终完全打开（也在横向模式下），我执行以下操作

在onCreateDialog中创建BottomSheetDialog和视图。将此视图添加到BottomSheetDialog后，可以使用BottomSheetBehavior.from（）中视图的父级来获取BottomSheetBehavior

然后在BottomSheetDialogFragment的onStart中，调用状态为展开的BottomSheetBehavior.setState

BottomSheetBehavior mBottomBehavior;

public Dialog onCreateDialog(Bundle savedInstanceState) {
    BottomSheetDialog dialog = new BottomSheetDialog(getContext());
    mBinding = SomeBinding.inflate(LayoutInflater.from(getContext()));
    dialog.setContentView(mBinding.getRoot());
    mBottomBehavior = BottomSheetBehavior.from((View) mBinding.getRoot().getParent());
    return dialog;
}

public void onStart() {
    super.onStart();
    mBottomBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
}

我希望这对某人有所帮助。

BottomSheetDialog； BottomSheet行为BottomSheet行为

private void createBottomSheet() {
    if (dialog == null){
        dialog = new BottomSheetDialog(this);

        final View view = LayoutInflater.from(this).inflate(R.layout.setting_dialog,
                (ViewGroup)this.getWindow().getDecorView().getRootView(),false);

        dialog.setContentView(view);
        bottomSheetBehavior = BottomSheetBehavior.from((View)view.getParent());
        dialog.setOnShowListener(new DialogInterface.OnShowListener() {
            @Override
            public void onShow(DialogInterface dialog) {
                bottomSheetBehavior.setPeekHeight(view.getHeight());
            }
        });
    }
}

---

我个人选择解决这个问题是，在创建视图之后，您已经拥有BottomSheetDialogFragment的主视图

创建视图后，将执行onStart，因此您可以使用以下行为：

@Override
public void onStart() {
    super.onStart();
    //this expands the bottom sheet even after a config change
    bottomSheetBehavior = BottomSheetBehavior.from((View) mainLayout.getParent());
    bottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
}

---

然后，您将始终在androidX中展开底部工作表，底部工作表可按如下方式展开：

 BottomSheetDialog bottomSheetDialog = 
       new BottomSheetDialog(requireContext());

  bottomSheetDialog.setContentView(view);

    bottomSheetDialog.show();

    FrameLayout bottomSheet = (FrameLayout)
            bottomSheetDialog.findViewById(com.google.android.material.R.id.design_bottom_sheeet);
    BottomSheetBehavior behavior = BottomSheetBehavior.from(bottomSheet);
    behavior.setState(BottomSheetBehavior.STATE_EXPANDED);
    behavior.setPeekHeight(0);

在获取底部板材行为的同时，如果出现以下错误，这也会很有帮助：

---

“视图不是coordinatorlayout的子视图”

这可以通过两行实现（Kotlin版本）

---

将此函数添加到类扩展DialogFragment的实现中，将完成必要的操作：

@Override
public void onStart() {
    super.onStart();
    BottomSheetBehavior.from((View) requireView().getParent()).setState(BottomSheetBehavior.STATE_EXPANDED);
    //  Opens the bottom sheet in expanded state even in landscape mode
    BottomSheetBehavior.from((View) requireView().getParent()).setSkipCollapsed(true);
    //  Skips the peek view of the bottom sheet
}

---

尽管我同意这看起来是错误的