How to disable BottomSheetDialogFragment dragging

Question

How to disable BottomSheetDialogFragment dragging by finger?

I saw similar questions, but they're all about BottomSheet not BottomSheetDialogFragment.

Answer 1

Having created MyActivity as follows:

public class MyActivity extends AppCompatActivity {      @Override     protected void onCreate(@Nullable Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_my);          new MyBottomSheetFragment().show(getSupportFragmentManager(), "tag");     }      public static class MyBottomSheetFragment extends BottomSheetDialogFragment {          @Override         public void setupDialog(Dialog dialog, int style) {             BottomSheetDialog bottomSheetDialog = (BottomSheetDialog) dialog;             bottomSheetDialog.setContentView(R.layout.sample);              try {                 Field behaviorField = bottomSheetDialog.getClass().getDeclaredField("behavior");                 behaviorField.setAccessible(true);                 final BottomSheetBehavior behavior = (BottomSheetBehavior) behaviorField.get(bottomSheetDialog);                 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) {                     }                 });             } catch (NoSuchFieldException e) {                 e.printStackTrace();             } catch (IllegalAccessException e) {                 e.printStackTrace();             }         }     } } 

Where R.layout.sample is a simple layout:

<?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="wrap_content"     android:orientation="vertical">      <View         android:layout_width="match_parent"         android:layout_height="100dp"         android:background="#e479da" />      <View         android:layout_width="match_parent"         android:layout_height="100dp"         android:background="#798de4" />      <View         android:layout_width="match_parent"         android:layout_height="100dp"         android:background="#e4db79" />  </LinearLayout> 

You'll get following output:

^{A part of solution is borrowed from this answer.}

Answer 2

There is simpler way of achieving the same after material design 1.2.0 was released.

https://developer.android.com/reference/com/google/android/material/bottomsheet/BottomSheetBehavior#setdraggable

When calling from BottomSheetDialogFragment:

    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {         val bottomSheetDialog = super.onCreateDialog(savedInstanceState) as BottomSheetDialog         bottomSheetDialog.setOnShowListener {             val bottomSheet = bottomSheetDialog                 .findViewById<FrameLayout>(com.google.android.material.R.id.design_bottom_sheet)              if (bottomSheet != null) {                 val behavior: BottomSheetBehavior<*> = BottomSheetBehavior.from(bottomSheet)                 behavior.isDraggable = false             }         }         return bottomSheetDialog     } 

Or with styling:

    <style name="SomeStyle" parent="Theme.MaterialComponents.Light.BottomSheetDialog">         <item name="behavior_draggable">false</item>     </style> 

And then in onCreate of your dialog fragment:

    override fun onCreate(savedInstanceState: Bundle?) {         super.onCreate(savedInstanceState)         setStyle(DialogFragment.STYLE_NORMAL, R.style.SomeStyle)     }