android – Disabling User dragging on BottomSheet-ThrowExceptions

Exception or error:

I am trying to disable user dragging on BottomSheet. The reason I want to disable is two things. 1. It’s preventing the ListView from scrolling downward, 2. I don’t want users to dismiss using dragging but with a button on the BottomSheetView. This is what I’ve done

 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;
                    }
                }
            });
        }
    });

The 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>

How to solve:

It can be now no longer relevant, but I will leave it here:

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
        }
    }
}

And use it in your xml file:

app:layout_behavior="com.your.package.LockableBottomSheetBehavior"

It disables all users actions, it can be used when you want control BottomSheet only programmatically.

###

check state in onStateChanged method of setBottomSheetCallback if state is BottomSheetBehavior.STATE_DRAGGING then change it to BottomSheetBehavior.STATE_EXPANDED this way you can stop STATE_DRAGGING by user. like below

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) {
            }
        });

use button to open close bottom sheet like below

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);
                }
            }
        });

don’t use setPeekHeight or app:behavior_peekHeight

by above way you can reach your goal

###

Alright, so the accepted answer didn’t work for me. However, Виталий Обидейко’s answer inspired my final solution.

First, I created the following custom BottomSheetBehavior. It overrides all of the methods involving touch, and returns false (or did nothing) if it is locked. Otherwise, it acts like a normal BottomSheetBehavior. This disables the user’s ability to drag down, and does not affect changing the state in code.

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;

    }
}

Here’s an example of how to use it. In my case, I needed it so the Bottom Sheet locked when expanded.

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) {}
    });
}

Hope this helps clear up a lot of the confusion!

###

I ended up writing a workaround to address this use case of dynamically disabling user dragging, whereby BottomSheetBehavior is subclassed to override onInterceptTouchEvent, and to ignore it when a custom flag (in this case mAllowUserDragging) is set to false:

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);
    }
}

And in your layout xml:

    <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" />

So far, this is the most consistently behaving solution for disabling user dragging on the Bottom Sheet on demand.

All of the other solutions that relied on firing another setState call in the onStateChanged callback resulted in the BottomSheet getting into a bad state, or causes significant UX issues (in the case of posting the setState call in a Runnable).

Hope this helps someone 🙂

Ray

###

Late answer, but, this is what worked for me, which is a bit different to what others have suggested.

You could try setting the cancelable property to false, i.e.

setCancelable(false);

and then manually handling the events where you would like to dismiss the dialog in the setupDialog method.

@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();
        }
    });
}

This works with a ListView inside the dialog fragment, which was where I was getting a little stuck with other solutions.

###

The accepted answer doesn’t work on the first test device I use. And the bounce back is not smooth. It seems better to set the state to STATE_EXPANDED only after a user releases the dragging. The following is my version:

    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) {
        }
    });

###

Add this code to BottomSheetBehavior object. Dragging will be disabled.
Works fine for me.

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) {

      }
});

###

To lock the BottomSheet and avoid the user to swipe it out this is what I did

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

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

It works quite well for me.

###

Easy way to lock dragging is setPeekHeight same as view height.
For example:

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);
}

###

Expected behavior:

  • BottomSheet does not close on drag-down
  • BottomSheet closes if touched outside of the dialog window

Code:

class MyBottomSheet : BottomSheetDialogFragment () {

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

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

 }

###

You don’t need to block all events when the bottom sheet is disabled. You can block only ACTION_MOVE event. That’s why use custom bottom sheet behavior like this

public class BottomSheetBehaviorWithDisabledState<V extends View> extends BottomSheetBehavior<V> {
    private boolean enable = true;

    /**
     * Default constructor for instantiating BottomSheetBehaviors.
     */
    public BottomSheetBehaviorWithDisabledState() {
        super();
    }

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

    public void setEnable(boolean enable){
        this.enable = enable;
    }

    @Override
    public boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) {
        if (!enable && event.getAction() == MotionEvent.ACTION_MOVE){
            return false;
        }
        return super.onInterceptTouchEvent(parent, child, event);
    }
}

###

set bottomSheet onClickListener to null.

bottomSheet.setOnClickListener(null);

this line disables all action about bottomSheet only and does not effect on inner view.

###

A sample with BottomSheetDialogFragment. It works perfectly.

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.setBottomSheetCallback(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
    }

    ...
}

###

I have found amazing solution. The initial problem was once bottomSheet was going to HIDDEN state then it was not showing up at bottomSheetDialog.show().
But I wanted to get the dialog visible on show() method and also wanted to enable the user to swipe it down so that it feels like bottom sheet. Below is what I did..

    BottomSheetDialog itemTypeDialog = new BottomSheetDialog(this);
    View bottomSheetView = getLayoutInflater().inflate(R.layout.dialog_bottomsheet, null);
    itemTypeDialog.setContentView(bottomSheetView);
    BottomSheetBehavior bottomSheetBehavior = BottomSheetBehavior.from((View) bottomSheetView.getParent());
    bottomSheetBehavior.setBottomSheetCallback(bottomSheetCallback); // You can also attach the listener here itself.

    BottomSheetBehavior.BottomSheetCallback bottomSheetCallback =  new BottomSheetBehavior.BottomSheetCallback() {
    @Override
    public void onStateChanged(@NonNull View bottomSheet, int newState) {
        Log.d(TAG, "BottomSheetCallback: " + newState);
        if (newState == BottomSheetBehavior.STATE_HIDDEN) {
            bottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
            itemTypeDialog.dismiss();
        } 
    }

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

    }
};

###

  1. Copy BottomSheetDialog to your project and rename to MyBottomSheetDialog
  2. add getBottomSheetBehavior to MyBottomSheetDialog
  3. use MyBottomSheetDialog instead BottomSheetDialog
  4. bottomSheetBehavior.setBottomSheetCallback

code like this

public class MyBottomSheetDialog extends AppCompatDialog {

    // some code

    public BottomSheetBehavior<FrameLayout> getBottomSheetBehavior() {
        return mBehavior;
    }

    // more code

in your code

    final BottomSheetBehavior<FrameLayout> bottomSheetBehavior = myBottomSheetDialog.getBottomSheetBehavior();
    bottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
        @Override
        public void onStateChanged(@NonNull View bottomSheet, int newState) {
            if (newState == BottomSheetBehavior.STATE_DRAGGING) {
                bottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
            }
        }

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

        }

###

Here is a working version of the top solution in Kotlin:

import android.support.design.widget.BottomSheetBehavior
import android.support.design.widget.CoordinatorLayout
import android.view.MotionEvent
import android.view.View

class CustomBottomSheetBehavior<V : View> : BottomSheetBehavior<V>() {

    @Suppress("UNCHECKED_CAST")
    companion object {
        fun <V : View> from(view: V): CustomBottomSheetBehavior<V> {
            val params = view.layoutParams as? CoordinatorLayout.LayoutParams ?:
                throw IllegalArgumentException("The view is not a child of CoordinatorLayout")
                params.behavior as? BottomSheetBehavior<V> ?:
                    throw IllegalArgumentException("The view is not associated with BottomSheetBehavior")
                params.behavior = CustomBottomSheetBehavior<V>()
            return params.behavior as CustomBottomSheetBehavior<V>
        }
    }

    override fun onInterceptTouchEvent(parent: CoordinatorLayout, child: V, event: MotionEvent): Boolean {
        return false
    }

    override fun onTouchEvent(parent: CoordinatorLayout, child: V, event: MotionEvent): Boolean {
        return false
    }

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

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

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

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

Then whenever you wanna use:

val bottomSheetBehavior by lazy {
    CustomBottomSheetBehavior.from(bottom_sheet_main)
}

The bottom_sheet_main is the actual view using Kotlin Android Extensions.

###

This is basically the kotlin version of the right answer at the top:

    class LockedBottomSheetBehavior<V : View>(context: Context, attrs: AttributeSet) :
        BottomSheetBehavior<V>(context, attrs) {

    companion object {
        fun <V : View> from(view: V): LockedBottomSheetBehavior<*> {
            val params = view.layoutParams as? CoordinatorLayout.LayoutParams
                    ?: throw IllegalArgumentException("The view is not a child of CoordinatorLayout")
            return params.behavior as? LockedBottomSheetBehavior<*>
                    ?: throw IllegalArgumentException(
                            "The view is not associated with BottomSheetBehavior")
        }
    }

    override fun onInterceptTouchEvent(
            parent: CoordinatorLayout,
            child: V, event: MotionEvent
    ) = false

    override fun onTouchEvent(
            parent: CoordinatorLayout,
            child: V,
            event: MotionEvent
    ) = false

    override fun onStartNestedScroll(
            coordinatorLayout: CoordinatorLayout,
            child: V,
            directTargetChild: View,
            target: View,
            axes: Int,
            type: Int) = false

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

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

    override fun onNestedPreFling(
            coordinatorLayout: CoordinatorLayout,
            child: V,
            target: View,
            velocityX: Float,
            velocityY: Float
    ) = false
}

###

Adjusting the peakHeight value worked for me.

I set the peakheight as the height of bottomsheet if it is expanded.

    private val bottomSheetCallback = object : BottomSheetBehavior.BottomSheetCallback() {
    override fun onSlide(bottomSheet: View, slideOffset: Float) {

    }

    override fun onStateChanged(bottomSheet: View, newState: Int) {
        if (newState == BottomSheetBehavior.STATE_EXPANDED)
            bottomSheetBehavior.peekHeight = bottomSheet.height
    }
}

###

Try this.

1) Create bottom sheet and declare the variable in your java class like

private BottomSheetBehavior sheetBehavior;

2) sheetBehavior = BottomSheetBehavior.from(bottomSheet);

3) In the bottom sheet callback function add the following lines.

sheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
            @Override
            public void onStateChanged(@NonNull View bottomSheet, int newState) {
                switch (newState) {
                    case BottomSheetBehavior.STATE_HIDDEN:
                        Log.d(TAG, "--------------  STATE_HIDDEN");
                        break;
                    case BottomSheetBehavior.STATE_EXPANDED: {
                        Log.d(TAG, "--------------  STATE_EXPANDED");
                    }
                    break;
                    case BottomSheetBehavior.STATE_COLLAPSED: {
                        Log.d(TAG, "--------------  STATE_COLLAPSED");
                    }
                    break;
                    case BottomSheetBehavior.STATE_DRAGGING:
                        sheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
                        break;
                    case BottomSheetBehavior.STATE_SETTLING:
                        Log.d(TAG, "--------------  STATE_SETTLING");
                        break;
                }
            }

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

            }
        });

###

    LayoutInflater inflater = LayoutInflater.from(context);
            View view = inflater.inflate(R.layout.bottomsheet_view_profile_image, null);
            BottomSheetDialog dialog = new BottomSheetDialog(context);
            dialog.setContentView(view);
            dialog.setCancelable(false);


            BottomSheetBehavior behavior = BottomSheetBehavior
                    .from(((View) view.getParent()));
            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) {
                }
            });
            behavior.setState(BottomSheetBehavior.STATE_EXPANDED);
            behavior.setSkipCollapsed(true);
            dialog.show();

###

I have the same issue in BottomSheetDialogFragment and apply many solutions using behavior of dialog but none of those solve my issue and then I solved it but setting setCancelable(false); at the time of initialization of dialog.

DialogEndRide dialogCompleteRide = new DialogEndRide();
dialogCompleteRide.setCancelable(false);
dialogCompleteRide.show(getChildFragmentManager(), "");

This will disable gesture on BottomSheetDialogFragment and you can dismiss dialog programmatically by using dismiss(); function.

###

At first, I just wanna give thanks to all of you who tried to give an answer. I am just writing this answer by solving this problem as I want. I’m going to describe how I do that step by step by taking help from here.

Visualization: After clicking on the Button Show BottomSheet you will see the second screen. Now you will see that BottomSheet is just locked up for dragging. But if you click on the Country List the BottomSheet will hide. This was the description now let’s dig into the Code.

  • At first, add the design support library to your build.gradle file:

    implementation ‘com.android.support:design:28.0.0’

  • UserLockBottomSheetBehavior.java: Credit: James Davis (Thanks Man)

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

    public UserLockBottomSheetBehavior() {
        super();
    }

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

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

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

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

    @Override
    public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, int dy, int[] consumed) {
    }

    @Override
    public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, V child, View target) {
    }

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

}
  • bottomsheet.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/bottomSheet"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="center_vertical"
    android:orientation="vertical"
    app:behavior_hideable="true"
    app:layout_behavior="com.samsolution.custombottomsheet.UserLockBottomSheetBehavior">

 <RelativeLayout
     android:id="@+id/minimizeLayout"
     android:background="@color/colorPrimary"
     android:layout_width="match_parent"
     android:layout_height="?android:attr/actionBarSize">

     <TextView
         android:layout_centerHorizontal="true"
         android:padding="16dp"
         android:layout_width="wrap_content"
         android:layout_height="?android:attr/actionBarSize"
         android:gravity="center_horizontal|center"
         android:text="Country List"
         android:textColor="#FFFFFF"
         android:textStyle="bold" />
 </RelativeLayout>

    <android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ListView
            android:id="@+id/homeCountryList"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

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

</LinearLayout>
  • activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FFFFFF"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_gravity="center"
        android:onClick="showCountryListFromBottomSheet">

        <Button
            android:layout_gravity="center"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@android:color/holo_red_light"
            android:onClick="showCountryListFromBottomSheet"
            android:padding="16dp"
            android:text="Show BottomSheet"
            android:textAllCaps="false"
            android:textColor="#ffffff" />

    </LinearLayout>

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

</android.support.design.widget.CoordinatorLayout>
  • MainActivity.java
public class MainActivity extends AppCompatActivity {

    private BottomSheetBehavior<LinearLayout> bottomSheetBehavior;                                  // BottomSheet Instance
    LinearLayout bottomsheetlayout;
    String[] list = {"A", "B", "C", "D", "A", "B", "C", "D","A", "B", "C", "D","A", "B", "C", "D","A", "B", "C", "D"};

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

        bottomsheetlayout = findViewById(R.id.bottomSheet);
        bottomSheetBehavior = BottomSheetBehavior.from(bottomsheetlayout);

        ListView listView = findViewById(R.id.homeCountryList);
        ArrayAdapter<String> adapter = new ArrayAdapter<>(this,android.R.layout.simple_list_item_1,list);
        listView.setAdapter(adapter);

        bottomSheetHide();                                                                          //BottomSheet get hide first time

        RelativeLayout minimizeLayoutIV;                                                            // It will hide the bottomSheet Layout
        minimizeLayoutIV = findViewById(R.id.minimizeLayout);
        minimizeLayoutIV.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               bottomSheetHide();
            }
        });
    }

    public void showCountryListFromBottomSheet(View view) {
        bottomSheetBehavior.setHideable(false);
        bottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
    }

    public void bottomSheetHide(){
        bottomSheetBehavior.setHideable(true);
        bottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
    }
}

First Screen Second Screen

###

this is the first result in google so I believe its only fair to put the simple solution in here:

   private fun disableDragToDismiss() {
    if (dialog is BottomSheetDialog) {
        val bsDialog = dialog as BottomSheetDialog
        bsDialog.behavior.isHideable = false
    } else {
        Log.d(TAG, " BottomSheetDialog with dialog that is not BottomSheetDialog")
    }
}

and than just call it from onCreateView() in the BottomSheetDialogFragment implementation

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