如何基于微调项目选择在recyclerview中应用过滤器？

Question

嗨，我得到的情况下，加载图像的活动基于spinner选择。在这里，我将把这些图像作为一个ArrayList和来自api的微调值。我不知道如何应用过滤器在这里基于微调选择。请提出解决方案。在我的代码下面。

对于活动：

public class MedicalRecordsActivity extends BaseActivity implements MedicalRecordsView { 

@Inject 
MedicalRecordsPresenter mPresenter; 

@Bind(R.id.back_img_rl) 
RelativeLayout backImage; 

@Bind(R.id.tv_toolbartitle) 
TextView header; 

@Bind(R.id.upload_btn_layout) 
RelativeLayout uploadBtnLayout; 

@Bind(R.id.spinner_industry) 
Spinner categorySpinner; 

@Bind(R.id.images_recycler_view) 
RecyclerView recyclerView; 

List<MemberImageModel> arrayList; 
String patientID, imageType, title; 
EditText fileName; 
ProgressDialog categoryProgress, uploadProgress; 

List<String> uploadTypesList; 
ArrayAdapter<String> categoryAdapter; 
static String selectedSpinnerItem; 
File imageProfileFile; 

List<ProfileImagesModel> membersList; 
MedicalRecordsAdapter dataAdapter = null; 

List<String> Prescription = new ArrayList<>(); 

private static final int RC_CAMERA_PERM = 123; 
private static final int RC_GALLERY = 124; 
private static final int RC_SETTINGS_SCREEN = 125; 
private static final int RC_WRITE_EXTERNAL_STORAGE = 126; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_medical_records); 
    ButterKnife.bind(this); 
    activityComponent().inject(this); 
    mPresenter.attachView(this); 

    header.setText("Medical Records"); 
    uploadBtnLayout.setVisibility(View.VISIBLE); 
    patientID = PrefUtils.getPatientID(this); 
    categoryProgress = new ProgressDialog(this); 
    categoryProgress.setMessage(getString(R.string.loading)); 

    uploadProgress = new ProgressDialog(this); 
    uploadProgress.setMessage(getString(R.string.file_uploading)); 
} 

@Override 
public void onResume() { 
    super.onResume(); 
    callGetProfileApi(); 
    callUploadTypesApi(); 
} 

@Override 
public void onBackPressed() { 
    finish(); 
} 

@OnClick(R.id.back_img_rl) 
public void onBackClicked() { 
    finish(); 
} 

@Override 
public void getRecordType(UploadTypes response) { 
    if (response != null) { 
     if (response.isSuccess()) { 
      uploadTypesList = new ArrayList<>(); 
      for (UploadTypes.TypesInfo typesInfo : response.getResponseObject()) { 
       uploadTypesList.add(typesInfo.getDocumentname()); 
      } 
      loadSpinner(uploadTypesList); 

      categorySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
       @Override 
       public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
        selectedSpinnerItem = uploadTypesList.get(position); 
        dataAdapter.getFilter().filter(selectedSpinnerItem); 
        //callGetProfileApi(); 
       } 

       @Override 
       public void onNothingSelected(AdapterView<?> parent) { 

       } 
      }); 
     } 
    } 
} 

@Override 
public void showCategoryProgress() { 
    categoryProgress.show(); 
} 

@Override 
public void hideCategoryProgress() { 
    categoryProgress.dismiss(); 
} 

@Override 
public void showUploadProgress() { 
    uploadProgress.show(); 
} 

@Override 
public void hideUploadProgress() { 
    uploadProgress.dismiss(); 
} 

@Override 
public void showProfile(ProfileResponse response) { 
    if (response != null) { 
     if (response.isSuccess()) { 
      membersList = response.getResponseObject().get(0).getImages(); 
      setAdapter(); 
     } 
    } 
} 

@Override 
public void showProgress() { 

} 

@Override 
public void hideProgress() { 

} 

@Override 
public void showNoInternet() { 

} 

@Override 
public void showNoData() { 

} 

@Override 
public void showError() { 

} 

private void callUploadTypesApi() { 
    mPresenter.getRecordType(ApiConstants.PLATFORM_VAL, patientID, ApiConstants.ROLE_ID_VAL); 
} 

private void callGetProfileApi() { 
    mPresenter.getProfileDetails(patientID); 
} 

public static String getSelectedItem() { 
    return selectedSpinnerItem; 
} 

private void loadSpinner(List<String> categoryList) { 
    categoryAdapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_item, categoryList); 
    categoryAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    categorySpinner.setAdapter(categoryAdapter); 
} 

private void setAdapter() { 
    try { 
     RecyclerView.LayoutManager layoutManager = new GridLayoutManager(this, 2); 
     recyclerView.setLayoutManager(layoutManager); 
     MedicalRecordsAdapter dataAdapter = new MedicalRecordsAdapter(this, membersList); 
     recyclerView.setAdapter(dataAdapter); 
     /* dataAdapter.getFilter().filter(selectedSpinnerItem); 
     dataAdapter.notifyDataSetChanged();*/ 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 
}} 

对于适配器：

public class MedicalRecordsAdapter extends RecyclerView.Adapter<MedicalRecordsAdapter.ViewHolder> implements Filterable { 

Context context; 
List<ProfileImagesModel> membersList, filterList; 
//CustomFilter filter; 

public MedicalRecordsAdapter(Context context, List<ProfileImagesModel> membersList) { 
    this.context = context; 
    this.membersList = membersList; 
    this.filterList = membersList; 
} 

@Override 
public MedicalRecordsAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_patient_record, parent, false); 
    return new MedicalRecordsAdapter.ViewHolder(view); 
} 

@Override 
public void onBindViewHolder(MedicalRecordsAdapter.ViewHolder holder, int position) { 
    holder.recordName.setText(filterList.get(position).getTitle()); 
    holder.recordDate.setText(filterList.get(position).getCreateddate()); 
    String thumbnail = filterList.get(position).getImagepath(); 
    Glide.with(context) 
      .load(ApiEndpoint.IMAGE_URL + thumbnail) 
      .into(holder.thumbnail); 
} 

@Override 
public int getItemCount() { 
    return filterList.size(); 
} 

@Override 
public Filter getFilter() { 
    /*if (filter == null) { 
     filter = new CustomFilter(filterList, this); 
    } 
    return filter;*/ 
    return new Filter() { 
     @Override 
     protected FilterResults performFiltering(CharSequence constraint) { 
      String charString = constraint.toString(); 

      if (charString.isEmpty()) { 

       filterList = membersList; 
      } else { 

       List<ProfileImagesModel> filteredList = new ArrayList<>(); 

       for (ProfileImagesModel androidVersion : membersList) { 

        if (androidVersion.getType().contains(charString) /*|| androidVersion.getName().toLowerCase().contains(charString) || androidVersion.getVer().toLowerCase().contains(charString)*/) { 

         filteredList.add(androidVersion); 
        } 
       } 

       filterList = filteredList; 
      } 

      FilterResults filterResults = new FilterResults(); 
      filterResults.values = filterList; 
      return filterResults; 
     } 

     @Override 
     protected void publishResults(CharSequence constraint, FilterResults results) { 
      filterList = (List<ProfileImagesModel>) results.values; 
      notifyDataSetChanged(); 
     } 
    }; 
} 

public class ViewHolder extends RecyclerView.ViewHolder { 

    private TextView recordName; 
    private TextView recordDate; 
    private ImageView thumbnail; 

    public ViewHolder(View itemView) { 
     super(itemView); 
     recordName = (TextView) itemView.findViewById(R.id.small_card_record); 
     recordDate = (TextView) itemView.findViewById(R.id.small_card_date); 
     thumbnail = (ImageView) itemView.findViewById(R.id.imageview_small_card_thumbnail); 
    } 
}} 

Answer 1

从Adpater删除getFilter()方法并添加下面的方法：

public void filter(String charText) { 
    charText = charText.toLowerCase(Locale.getDefault()); 
    membersList.clear(); 

    if (charText.length() == 0) { 

     membersList.addAll(filterList); 

    } else { 
     for (int i=0; i<filterList.size(); i++) { 
      ProfileImagesModel androidVersion = filterList.get(i); 
      if (androidVersion.getType().toLowerCase(Locale.getDefault()).contains(charText)) { 
       membersList.add(androidVersion); 
      } 
     } 
    } 
    notifyDataSetChanged(); 
} 

甲ND调用下面的方法在setOnItemSelectedListener()

dataAdapter.filter(selectedSpinnerItem);