禁用用户在BottomSheet上拖动

Question

我试图禁用用户拖动BottomSheet.我想禁用的原因是两件事.1.它阻止ListView向下滚动,2.我不希望用户使用拖动但是使用按钮来解除BottomSheetView.这就是我所做的

 bottomSheetBehavior = BottomSheetBehavior.from(bottomAnc);
    bottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
        @Override
        public void onStateChanged(@NonNull View bottomSheet, int newState) {
            if (newState == BottomSheetBehavior.STATE_EXPANDED) {
                //Log.e("BottomSheet", "Expanded");
            } else if (newState == BottomSheetBehavior.STATE_COLLAPSED) {
                //Log.e("BottomSheet", "Collapsed");
            }
        }

        @Override
        public void onSlide(@NonNull View bottomSheet, float slideOffset) {
            // React to dragging events
            bottomSheet.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    int action = MotionEventCompat.getActionMasked(event);
                    switch (action) {
                        case MotionEvent.ACTION_DOWN:
                            return false;
                        default:
                            return true;
                    }
                }
            });
        }
    });

bottomSheetLayout

    <?xml version="1.0" encoding="utf-8"?><FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white"
app:behavior_hideable="true"
app:behavior_peekHeight="0dp"
app:layout_behavior="@string/bottom_sheet_behavior"
android:id="@+id/bottomSheet">

<android.support.v7.widget.CardView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:elevation="10dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:gravity="center_vertical">

            <TextView
                android:id="@+id/text1"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:text="Order Items"
                android:layout_margin="16dp"
                android:textAppearance="@android:style/TextAppearance.Large"/>


            <Button
                android:layout_width="50dp"
                android:layout_height="wrap_content"
                android:layout_marginRight="5dp"
                android:background="@drawable/bg_accept"/>

            <Button
                android:layout_width="50dp"
                android:layout_height="wrap_content"
                android:layout_marginRight="8dp"
                android:background="@drawable/bg_cancel"/>

        </LinearLayout>

        <ListView
            android:id="@+id/item_edit"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@color/white"
            android:divider="@color/md_divider_black"
            android:dividerHeight="1dp"/>

    </LinearLayout>

</android.support.v7.widget.CardView>

Answer 1

它现在已经不再适用了,但我会把它留在这里:

import android.content.Context
import android.util.AttributeSet
import androidx.coordinatorlayout.widget.CoordinatorLayout
import android.view.MotionEvent
import android.view.View
import com.google.android.material.bottomsheet.BottomSheetBehavior

@Suppress("unused")
class LockableBottomSheetBehavior<V : View> : BottomSheetBehavior<V> {
    constructor() : super()
    constructor(context: Context, attrs: AttributeSet) : super(context, attrs)

    var swipeEnabled = true

    override fun onInterceptTouchEvent(
        parent: CoordinatorLayout,
        child: V,
        event: MotionEvent
    ): Boolean {
        return if (swipeEnabled) {
            super.onInterceptTouchEvent(parent, child, event)
        } else {
            false
        }
    }

    override fun onTouchEvent(parent: CoordinatorLayout, child: V, event: MotionEvent): Boolean {
        return if (swipeEnabled) {
            super.onTouchEvent(parent, child, event)
        } else {
            false
        }
    }

    override fun onStartNestedScroll(
        coordinatorLayout: CoordinatorLayout,
        child: V,
        directTargetChild: View,
        target: View,
        axes: Int,
        type: Int
    ): Boolean {
        return if (swipeEnabled) {
            super.onStartNestedScroll(
                coordinatorLayout,
                child,
                directTargetChild,
                target,
                axes,
                type
            )
        } else {
            false
        }
    }

    override fun onNestedPreScroll(
        coordinatorLayout: CoordinatorLayout,
        child: V,
        target: View,
        dx: Int,
        dy: Int,
        consumed: IntArray,
        type: Int
    ) {
        if (swipeEnabled) {
            super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed, type)
        }
    }

    override fun onStopNestedScroll(
        coordinatorLayout: CoordinatorLayout,
        child: V,
        target: View,
        type: Int
    ) {
        if (swipeEnabled) {
            super.onStopNestedScroll(coordinatorLayout, child, target, type)
        }
    }

    override fun onNestedPreFling(
        coordinatorLayout: CoordinatorLayout,
        child: V,
        target: View,
        velocityX: Float,
        velocityY: Float
    ): Boolean {
        return if (swipeEnabled) {
            super.onNestedPreFling(coordinatorLayout, child, target, velocityX, velocityY)
        } else {
            false
        }
    }
}

它禁用所有用户操作,只能以编程方式控制BottomSheet时使用它.您可以编辑它并为调用__CODE__方法创建布尔标志而不是__CODE__.

Answer 2

检查状态onStateChanged的方法setBottomSheetCallback,如果状态BottomSheetBehavior.STATE_DRAGGING,然后将其更改为BottomSheetBehavior.STATE_EXPANDED这种方式,您可以阻止STATE_DRAGGING用户.如下

final BottomSheetBehavior behavior = BottomSheetBehavior.from(bottomSheet);
        behavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
            @Override
            public void onStateChanged(@NonNull View bottomSheet, int newState) {
                if (newState == BottomSheetBehavior.STATE_DRAGGING) {
                    behavior.setState(BottomSheetBehavior.STATE_EXPANDED);
                }
            }

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

使用按钮打开如下所示的封闭底部

fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (behavior.getState() == BottomSheetBehavior.STATE_HIDDEN) {
                    behavior.setState(BottomSheetBehavior.STATE_EXPANDED);
                } else {
                    behavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
                }
            }
        });

不要使用setPeekHeight或app:behavior_peekHeight

通过以上方式,您可以达到目标

Answer 3

好吧,所以接受的答案对我不起作用.但是,ВиталийОбидейко的答案启发了我的最终解决方案.

首先,我创建了以下自定义BottomSheetBehavior.它会覆盖涉及触摸的所有方法,如果锁定则返回false(或不执行任何操作).否则,它就像一个普通的BottomSheetBehavior.这会禁用用户向下拖动的功能,并且不会影响更改代码中的状态.

LockableBottomSheetBehavior.java

public class LockableBottomSheetBehavior<V extends View> extends BottomSheetBehavior<V> {

    private boolean mLocked = false;

    public LockableBottomSheetBehavior() {}

    public LockableBottomSheetBehavior(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public void setLocked(boolean locked) {
        mLocked = locked;
    }

    @Override
    public boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) {
        boolean handled = false;

        if (!mLocked) {
            handled = super.onInterceptTouchEvent(parent, child, event);
        }

        return handled;
    }

    @Override
    public boolean onTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) {
        boolean handled = false;

        if (!mLocked) {
            handled = super.onTouchEvent(parent, child, event);
        }

        return handled;
    }

    @Override
    public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, V child, View directTargetChild, View target, int nestedScrollAxes) {
        boolean handled = false;

        if (!mLocked) {
            handled = super.onStartNestedScroll(coordinatorLayout, child, directTargetChild, target, nestedScrollAxes);
        }

        return handled;
    }

    @Override
    public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, int dy, int[] consumed) {
        if (!mLocked) {
            super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed);
        }
    }

    @Override
    public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, V child, View target) {
        if (!mLocked) {
            super.onStopNestedScroll(coordinatorLayout, child, target);
        }
    }

    @Override
    public boolean onNestedPreFling(CoordinatorLayout coordinatorLayout, V child, View target, float velocityX, float velocityY) {
        boolean handled = false;

        if (!mLocked) {
            handled = super.onNestedPreFling(coordinatorLayout, child, target, velocityX, velocityY);
        }

        return handled;

    }
}

这是一个如何使用它的例子.就我而言,我需要它,以便在展开时锁定底板.

activity_home.xml

<?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:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <android.support.design.widget.CollapsingToolbarLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_scrollFlags="scroll|snap"
            app:titleEnabled="false"/>
        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"/>
    </android.support.design.widget.AppBarLayout>

    <!-- Use layout_behavior to set your Behavior-->
    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layoutManager="android.support.v7.widget.LinearLayoutManager"
        app:layout_behavior="com.myapppackage.LockableBottomSheetBehavior"/>

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

HomeActivity.java

public class HomeActivity extends AppCompatActivity {
    BottomSheetBehavior mBottomSheetBehavior;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);

        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
        recyclerView.setAdapter(new SomeAdapter());

        mBottomSheetBehavior = BottomSheetBehavior.from(recyclerView);
        mBottomSheetBehavior.setBottomSheetCallback(new MyBottomSheetCallback());
    }

    class MyBottomSheetCallback extends BottomSheetBehavior.BottomSheetCallback() {
        @Override
        public void onStateChanged(@NonNull View bottomSheet, int newState) {
            if (newState == BottomSheetBehavior.STATE_EXPANDED) {
                if (mBottomSheetBehavior instanceof LockableBottomSheetBehavior) {
                    ((LockableBottomSheetBehavior) mBottomSheetBehavior).setLocked(true);
                }
            }
        }

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

希望这有助于消除很多困惑!

Answer 4

我最后编写了一个解决方法来解决动态禁用用户拖动的用例,其中BottomSheetBehavior被子类化以覆盖onInterceptTouchEvent,并在自定义标志(在本例中为mAllowUserDragging)设置为false时忽略它:

import android.content.Context;
import android.support.design.widget.BottomSheetBehavior;
import android.support.design.widget.CoordinatorLayout;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;

public class WABottomSheetBehavior<V extends View> extends BottomSheetBehavior<V> {
    private boolean mAllowUserDragging = true;
    /**
     * Default constructor for instantiating BottomSheetBehaviors.
     */
    public WABottomSheetBehavior() {
        super();
    }

    /**
     * Default constructor for inflating BottomSheetBehaviors from layout.
     *
     * @param context The {@link Context}.
     * @param attrs   The {@link AttributeSet}.
     */
    public WABottomSheetBehavior(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public void setAllowUserDragging(boolean allowUserDragging) {
        mAllowUserDragging = allowUserDragging;
    }

    @Override
    public boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) {
        if (!mAllowUserDragging) {
            return false;
        }
        return super.onInterceptTouchEvent(parent, child, event);
    }
}

在你的布局xml中:

    <FrameLayout
        android:id="@+id/bottom_sheet_frag_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:behavior_hideable="true"
        app:behavior_peekHeight="@dimen/bottom_sheet_peek_height"
        app:elevation="@dimen/bottom_sheet_elevation"
        app:layout_behavior="com.example.ray.WABottomSheetBehavior" />

到目前为止,这是最一致的行为解决方案,可以根据需要禁用用户拖动底部工作表.

依赖于在onStateChanged回调中触发另一个setState调用的所有其他解决方案导致BottomSheet进入错误状态,或导致重大的UX问题(在Runnable中发布setState调用的情况).

希望这有助于某人:)

射线

Answer 5

implementation 'com.google.android.material:material:1.2.0-alpha05'

您可以像这样禁用拖动BottomSheet。

import com.google.android.material.bottomsheet.BottomSheetBehavior
import com.google.android.material.bottomsheet.BottomSheetBehavior.STATE_EXPANDED

//another code

this.bottomSheetBehavior = BottomSheetBehavior.from(view)
this.bottomSheetBehavior.state = STATE_EXPANDED
this.bottomSheetBehavior.isDraggable = false // disable dragging

//another code
this.bottomSheetbehavior.isDraggable = true //draggable

(kotlin)，我希望这个答案可以解决您的问题。

已编辑）库已更新！您可以使用新的库版本

implementation 'com.google.android.material:material:1.2.1'

例子是一样的，祝你好运，好代码

Answer 6

预期行为：

• BottomSheet 不会在下拉时关闭
• 如果在对话框窗口外触摸，BottomSheet 将关闭

代码：

class MyBottomSheet : BottomSheetDialogFragment () {

   override fun onActivityCreated(savedInstanceState: Bundle?) {
       super.onActivityCreated(savedInstanceState)
       disableBottomSheetDraggableBehavior()
   }

   private fun disableBottomSheetDraggableBehavior() {
      this.isCancelable = false
      this.dialog?.setCanceledOnTouchOutside(true)
   }

 }

Answer 7

答案很晚，但是，这对我有用，这与其他人的建议有些不同。

您可以尝试将该cancelable属性设置为false，即

setCancelable(false);

然后手动处理您要在setupDialog方法中关闭对话框的事件。

@Override
public void setupDialog(final Dialog dialog, final int style) {

    // handle back button
    dialog.setOnKeyListener(new DialogInterface.OnKeyListener() {
        @Override
        public boolean onKey(final DialogInterface dialog, final int keyCode, final KeyEvent event) {
            if (keyCode == KeyEvent.KEYCODE_BACK) {
                dialog.dismiss();
            }
            return true;
        }
    });

    // handle touching outside of the dialog
    final View touchOutsideView = getDialog().getWindow().getDecorView().findViewById(android.support.design.R.id.touch_outside);
    touchOutsideView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(final View view) {
            dialog.dismiss();
        }
    });
}

这适用于对话框片段中的ListView，这是我对其他解决方案有点困惑的地方。

Answer 8

接受的答案对我使用的第一个测试设备不起作用.反弹并不顺利.仅在用户释放拖动后才将状态设置为STATE_EXPANDED似乎更好.以下是我的版本:

    final BottomSheetBehavior behavior = BottomSheetBehavior.from(findViewById(R.id.bottomSheet));
    behavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
        @Override
        public void onStateChanged(@NonNull View bottomSheet, int newState) {
            if (newState > BottomSheetBehavior.STATE_DRAGGING)
                bottomSheet.post(new Runnable() {
                    @Override public void run() {
                        behavior.setState(BottomSheetBehavior.STATE_EXPANDED);
                    }
                });
        }

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

Answer 9

将此代码添加到BottomSheetBehavior对象.拖动将被禁用.对我来说很好.

final BottomSheetBehavior behavior = BottomSheetBehavior.from((View) view.getParent());
    behavior.setHideable(false);
    behavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {

      @Override
      public void onStateChanged(@NonNull View bottomSheet, int newState) {
        if (newState == BottomSheetBehavior.STATE_DRAGGING) {
          behavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
        }

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

      }
});

Answer 10

一个带有 BottomSheetDialogFragment 的示例。它完美地工作。

编辑2020年9月4日：替代已贬值setBottomSheetCallback()与addBottomSheetCallback()

class FragMenuBDrawer : BottomSheetDialogFragment() {

    ...

    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        val dialog = super.onCreateDialog(savedInstanceState) as BottomSheetDialog

        dialog.setOnShowListener {
            val bottomSheet = (it as BottomSheetDialog).findViewById<View>(com.google.android.material.R.id.design_bottom_sheet) as FrameLayout?
            val behavior = BottomSheetBehavior.from(bottomSheet!!)
            behavior.state = BottomSheetBehavior.STATE_EXPANDED

            behavior.addBottomSheetCallback(object : BottomSheetBehavior.BottomSheetCallback() {
                override fun onStateChanged(bottomSheet: View, newState: Int) {
                    if (newState == BottomSheetBehavior.STATE_DRAGGING) {
                        behavior.state = BottomSheetBehavior.STATE_EXPANDED
                    }
                }

                override fun onSlide(bottomSheet: View, slideOffset: Float) {}
            })
        }

        // Do something with your dialog like setContentView() or whatever
        return dialog
    }

    ...
}

Answer 11

要锁定BottomSheet并避免用户将其滑出,这就是我所做的

public void showBottomSheet() {
    bsb.setHideable(false);
    bsb.setState(BottomSheetBehavior.STATE_EXPANDED);
}

public void hideBottomSheet() {
    bsb.setHideable(true);
    bsb.setState(BottomSheetBehavior.STATE_COLLAPSED);
}

它对我很有用.

Answer 12

锁定拖动的简单方法是 setPeekHeight 与视图高度相同。例如：

private LinearLayout bottomSheet;
private BottomSheetBehavior bottomBehavior;

@Override
public void onResume() {
    super.onResume();
    bottomBehavior = BottomSheetBehavior.from((bottomSheet);
    bottomBehavior.setPeekHeight(bottomSheet.getHeight());
    bottomBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
}

Answer 13

和 'com.google.android.material:material:1.2.0-alpha06'

非常适合NestedScrollView和RecyclerView

示例代码：

    LinearLayout contentLayout = findViewById(R.id.contentLayout);
    sheetBehavior = BottomSheetBehavior.from(contentLayout);
    sheetBehavior.setDraggable(false);