Android: How to hide bottom sheet when back button is pressed in fragment?

Question

I have a fragment with a bottom sheet inside and I want to hide it when back button is pressed, then with the second back go to previous fragment,I tried to use onBackPressed but it doesn't work. setOnKeyListener() it doesn't work too. Some help solution, wellcome.

Answer 1

this may help you !

   @Override
public void onBackPressed() {
    touchToBack++;

    if (touchToBack== 1) {
        if (bottomSheetBehavior!=null && bottomSheetBehavior.getState() !=
                BottomSheetBehavior.STATE_HIDDEN) {
            bottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
            touchToBack= 0;
            return;
        }

    }

    if (touchToBack== 1 || touchToBack> 1) {
        if (bottomSheetBehavior!=null && bottomSheetBehavior.getState() ==
                BottomSheetBehavior.STATE_HIDDEN) {
                           touchToBack= 0;
                           super.onBackPressed();
        }

    }

}

Answer 2

This is my code

public class ProfileImageFragment extends Fragment {

    View view;
    private ImageView profileImg, editIconImg, ivBsDelete, ivBsGallery;
    private BottomSheetBehavior bottomSheetBehavior;
    private RelativeLayout bottomSheetLayout;
    private static final int REQUEST_READ_MEDIA = 1;
    private static final int RESULT_OK = -1;

    public ProfileImageFragment() {
       // Required empty public constructor
    }

    public static ProfileImageFragment newInstance() {return new ProfileImageFragment();}

    @Override
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState);}

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
         // Inflate the layout for this fragment
         view = inflater.inflate(R.layout.fragment_profile_image, container, false);
         profileImg = (ImageView) view.findViewById(R.id.profileImage);
         editIconImg = (ImageView) view.findViewById(R.id.editProfileImage); //edit option

         bottomSheetLayout = view.findViewById(R.id.bottom_sheet2);
         bottomSheetBehavior = BottomSheetBehavior.from(bottomSheetLayout);
         bottomSheetBehavior.setHideable(true);
         bottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);

         //when longpress on image appears the bottomSheet
         profileImg.setOnLongClickListener(new View.OnLongClickListener() {
         @Override
            public boolean onLongClick(View v) {
            bottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
            return true;
            }
         });

         //when only clik on image hide the bottomSheet
         profileImg.setOnClickListener(new View.OnClickListener() {
         @Override
            public void onClick(View view) {
            bottomSheetBehavior.setHideable(true);//Important to add
            bottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
            }
         });

         //when only clik on image appears the bottomSheet
         editIconImg.setOnClickListener(new View.OnClickListener() {
         @Override
            public void onClick(View view) {
            bottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
            }
         });


         //delete option of bottomsheet
         ivBsDelete = (ImageView) view.findViewById(R.id.ivBsDelete);
         ivBsDelete.setOnClickListener(new View.OnClickListener(){
         @Override
         public void onClick(View v){
            ((MainActivity) getActivity()).imgPath = "";
            //Picasso.with(getContext()).invalidate(imagePath); //clear cache
            profileImg.setImageResource(R.drawable.user);
            ((MainActivity)getActivity()).imgProfile.setImageResource(R.mipmap.ic_launcher_round);

            bottomSheetBehavior.setHideable(true);
            bottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
            }
         });

         //add image from gallery option of bottomsheet
         ivBsGallery = (ImageView) view.findViewById(R.id.ivBsGallery);
         ivBsGallery.setOnClickListener(new View.OnClickListener(){
         @Override
            public void onClick(View view){
            int permissionCheck = ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.READ_EXTERNAL_STORAGE);

            if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(getActivity(), new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, REQUEST_READ_MEDIA);
            }else{
                Intent i = new Intent(
                        Intent.ACTION_PICK,
                        android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

                startActivityForResult(i, REQUEST_READ_MEDIA);
            }
            bottomSheetBehavior.setHideable(true);
            bottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
        }
    });
    return view;
}


@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    //GETTING IMAGE FROM GALLERY
    if (requestCode == REQUEST_READ_MEDIA && resultCode == RESULT_OK && null != data) {
        Uri selectedImage = data.getData();
        String[] filePathColumn = {MediaStore.Images.Media.DATA};

        Cursor cursor = this.getActivity().getContentResolver().query(selectedImage,
                filePathColumn, null, null, null);
        cursor.moveToFirst();

        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
        String picturePath = cursor.getString(columnIndex);
        ((MainActivity) getActivity()).imgPath = picturePath;
        cursor.close();

        Call<Response.LoadPictureProfile> call2 = ((MainActivity) getActivity()).getDataService.loadPictureProfile(((MainActivity) getActivity()).user.token, ((MainActivity) getActivity()).user.loadPictureProfile(picturePath));
        call2.enqueue(new Callback<Response.LoadPictureProfile>() {
            @Override
            public void onResponse(Call<Response.LoadPictureProfile> call, retrofit2.Response<Response.LoadPictureProfile> response) {
                ((MainActivity) getActivity()).responseLoadPictureProfile = response.body();
                if(((MainActivity) getActivity()).responseLoadPictureProfile.status)
                {
                    alert("Request", ((MainActivity) getActivity()).responseLoadPictureProfile.toString());

                }else{
                    alert("Mensaje", ((MainActivity) getActivity()).user.errorMsg(((MainActivity) getActivity()).responseLoadPictureProfile.error_code));
                }
            }

            @Override
            public void onFailure(Call<Response.LoadPictureProfile> call, Throwable t) {

            }
        });

        Picasso.with(getContext())
                .load(new File(((MainActivity) getActivity()).imgPath))
                .fit()
                .centerCrop()
                .into(profileImg);

        if(!((MainActivity) getActivity()).imgPath.isEmpty()){
            Picasso.with(getContext())
                    .load(new File(((MainActivity) getActivity()).imgPath))
                    .fit()
                    .centerCrop()
                    .into(((MainActivity)getActivity()).imgProfile);
        }
    }
}

protected void alert(String title,String message){
    android.app.AlertDialog alertDialog = new android.app.AlertDialog.Builder(getContext()).create();
    alertDialog.setTitle(title);
    alertDialog.setMessage(message);
    alertDialog.setButton(android.app.AlertDialog.BUTTON_NEUTRAL, "OK",
            new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                }
            });
    alertDialog.show();
    }
}