android – 如何禁用BottomSheetDialogFragment拖动

如何禁用BottomSheetDialogFragment手指拖动？

我看到了类似的问题,但它们都是关于BottomSheet而不是BottomSheetDialogFragment.

最佳答案

创建MyActivity如下：

    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 Dialog onCreateDialog(Bundle savedInstanceState) {
                BottomSheetDialog bottomSheetDialog = (BottomSheetDialog) super.onCreateDialog(savedInstanceState);
                bottomSheetDialog.setContentView(R.layout.sample);

                try {
                    Field mBehaviorField = bottomSheetDialog.getClass().getDeclaredField("mBehavior");
                    mBehaviorField.setAccessible(true);
                    final BottomSheetBehavior behavior = (BottomSheetBehavior) mBehaviorField.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();
                }

                return bottomSheetDialog;
            }
        }
    }

R.layout.sample是一个简单的布局：

你会得到以下输出：

解决方案的一部分是从this答案中借来的.