如何在android中使用api将多个选中的复选框值传递给服务器？

Question

我在数据库中有一个“服务”表，我使用适配器类在复选框中选择服务来获取服务。它显示带有复选框的服务。我想下客户通过复选框选择的订单。我需要将选中的复选框数据传递给 Api。但是如何将多个选中的复选框值传递给服务器？帮帮我。

这是我的代码

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recycler_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

<Button
    android:id="@+id/btn_get"
    android:layout_width="91dp"
    android:layout_height="38dp"
    android:text="Place Order"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="@+id/recycler_view"
    app:layout_constraintStart_toStartOf="@+id/recycler_view"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.72"
    tools:ignore="MissingConstraints" />

Service.java

public class Service {
@SerializedName("laundry_service_id")
@Expose
String laundryServiceId;
@SerializedName("laundry_service_name")
@Expose
String laundryServiceName;
@SerializedName("laundry_service_short_form")
@Expose
String laundryServiceShortForm;
@SerializedName("laundry_order_status_id")
@Expose
String laundryOrderStatusId;
@SerializedName("laundry_service_create_by")
@Expose
String laundryServiceCreateBy;
@SerializedName("laundry_service_join_date")
@Expose
String laundryServiceJoinDate;
public Service(String laundryServiceId, String laundryServiceName,
               String laundryServiceShortForm, String laundryOrderStatusId,
               String laundryServiceCreateBy, String laundryServiceJoinDate) {

    this.laundryServiceId = laundryServiceId;
    this.laundryServiceName = laundryServiceName;
    this.laundryServiceShortForm = laundryServiceShortForm;
    this.laundryOrderStatusId = laundryOrderStatusId;
    this.laundryServiceCreateBy = laundryServiceCreateBy;
    this.laundryServiceJoinDate = laundryServiceJoinDate;
}

public String getLaundryServiceId() {
    return laundryServiceId;
}

public void setLaundryServiceId(String laundryServiceId) {
    this.laundryServiceId = laundryServiceId;
}

public String getLaundryServiceName() {
    return laundryServiceName;
}

public void setLaundryServiceName(String laundryServiceName) {
    this.laundryServiceName = laundryServiceName;
}

public String getLaundryServiceShortForm() {
    return laundryServiceShortForm;
}

public void setLaundryServiceShortForm(String laundryServiceShortForm) {
    this.laundryServiceShortForm = laundryServiceShortForm;
}

public String getLaundryOrderStatusId() {
    return laundryOrderStatusId;
}

public void setLaundryOrderStatusId(String laundryOrderStatusId) {
    this.laundryOrderStatusId = laundryOrderStatusId;
}

public String getLaundryServiceCreateBy() {
    return laundryServiceCreateBy;
}

public void setLaundryServiceCreateBy(String laundryServiceCreateBy) {
    this.laundryServiceCreateBy = laundryServiceCreateBy;
}

public String getLaundryServiceJoinDate() {
    return laundryServiceJoinDate;
}

public void setLaundryServiceJoinDate(String laundryServiceJoinDate) {
    this.laundryServiceJoinDate = laundryServiceJoinDate;
}

}

ServiceAdapter.java

public class ServiceAdapter extends RecyclerView.Adapter<ServiceAdapter.ViewHolder> {
private static List<Integer> mSelectedItemsIds;
List<Service> serviceList;
//private List<Integer> mSelectedItemsIds;
Context context;

public ServiceAdapter(List<Service> serviceList, Context context) {
    this.serviceList = serviceList;
    this.context = context;
    mSelectedItemsIds = new ArrayList<>();
}

public static List<Integer> getSelectedIds() {
    return mSelectedItemsIds;
}

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

@Override
public void onBindViewHolder(@NonNull ViewHolder holder, final int position) {
    final Service serviceClass = serviceList.get(position);
    holder.chkbox.setText(serviceClass.getLaundryServiceName());

    holder.chkbox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if(isChecked){
                mSelectedItemsIds.add(position);
            }else{
                mSelectedItemsIds.remove(position);
            }
        }
    });
}

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

public class ViewHolder extends RecyclerView.ViewHolder {
    CheckBox chkbox;
    public ViewHolder(@NonNull View itemView) {
        super(itemView);
        chkbox=itemView.findViewById(R.id.chkbox);
    }
}

}

CheckboxActivity.java

public class CheckboxActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private List<Service> serList;
CheckBox checkBox;
int id;
Button btn_get;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_checkbox);

    checkBox = findViewById(R.id.chkbox);
    btn_get = findViewById(R.id.btn_get);


    recyclerView = (RecyclerView)findViewById(R.id.recycler_view);
    LinearLayoutManager LayoutManager = new LinearLayoutManager(CheckboxActivity.this, 
    LinearLayoutManager.VERTICAL,false);
    recyclerView.setLayoutManager(LayoutManager);

    btn_get.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
           viewService();
        }
    });

    Call<List<Service>>call = RetrofitClient
            .getInstance()
            .getApi()
            .getServices();

    call.enqueue(new Callback<List<Service>>() {
        @Override
        public void onResponse(Call<List<Service>> call, Response<List<Service>> response) {
            serList = response.body();
            ServiceAdapter serviceAdapter = new ServiceAdapter(serList,CheckboxActivity.this);
            recyclerView.setAdapter(serviceAdapter);
            id = serList.size();
            Toast.makeText(CheckboxActivity.this,"Get the services"+id,Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onFailure(Call<List<Service>> call, Throwable t) {
            Toast.makeText(CheckboxActivity.this,"Try It" + 
    t.getMessage(),Toast.LENGTH_SHORT).show();
            System.out.println(t.getMessage());
        }
    });
}

private void viewService() {
    List<Integer> selectedid =  ServiceAdapter.getSelectedIds();
    //Log.d("List","=");
    Toast.makeText(CheckboxActivity.this,"Clicked"+selectedid,Toast.LENGTH_SHORT).show();
    for (int i = 0; i < selectedid.size(); i++) {
        int chk = selectedid.get(i);
        if (checkBox.isChecked()) {
            String ch = checkBox.getText().toString();
            Toast.makeText(CheckboxActivity.this,"Data"+ch,Toast.LENGTH_SHORT).show();
        }

    }
}
}

API.java

@FormUrlEncoded
@POST("place_id.php")
Call<OrderResponse> place(
        @Field("list") List<Integer> selectedid);

我试过上面的代码。 Service.java 类我得到所有服务响应以显示在 recyclerview 中并带有一个复选框。现在我想将选中的复选框值传递给服务器。请帮帮我。

Answer 1

在您的 adapter 类中，您将 position 添加到列表 mSelectedItemIds。

mSelectedItemsIds.add(position);

您应该做的是将Service 类的对象中的字段添加到该列表中。因此，假设您要将所选复选框的laundryServiceIds 传递给服务器。那么，在这种情况下，你应该这样做：

在您的适配器中，将列表项的类型更改为字符串：

private static List<Integer> mSelectedItemsIds;

在您的适配器的onBindViewHolder 中：

if(isChecked){
mSelectedItemsIds.add(serviceClass.getLaundryServiceId());
}else{
mSelectedItemsIds.remove(serviceClass.getLaundryServiceId());
}

然后在需要时将ServiceAdapter.getSelectedIds() 传递给服务器。

我希望这能解决您的问题，如果有任何困惑，请随时发表评论。