使用支持库中的BottomSheet时如何调暗背景？

Question

背景如何变暗，就像显示here一样？

我已使用CoordinatorLayout和BottomSheetBehavior正常设置。

Answer 1

这只会显示一个底页。

public class MyBottomSheet extends BottomSheetDialogFragment {
    private static final String TAG = "MyBottomSheet";

    @NonNull
    @Override
    public Dialog onCreateDialog(final Bundle savedInstanceState) {
        final BottomSheetDialog dialog = (BottomSheetDialog) super.onCreateDialog(savedInstanceState);

        final View view = View.inflate(getContext(), R.layout.my_custom_view, null);

        dialog.setContentView(view);
        behavior = BottomSheetBehavior.from((View) view.getParent());

        return dialog;
    }

    public void show(final FragmentActivity fragmentActivity) {
        show(fragmentActivity.getSupportFragmentManager(), TAG);
    }
}

要像普通电话close()一样关闭对话框。

Answer 2

使用BottomSheetDialog

基本上它是一个对话框（即支持暗淡）并且支持模态底页行为试一试

Answer 3

    bottomSheetBehavior.addBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
                @Override
                public void onStateChanged(@NonNull View bottomSheet, int newState) {}

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

                            (your_layout/view).setAlpha(1 - slideOffset);

                }
            });