Question

我在这里 GSON 用于 Json解析我正在获取我在[ { "id": 1, "warehouse_id": "1", "name": "Brookline, MA", "store_code": "Brookline", "created_at": "2016-06-15 07:08:29", "updated_at": null }, { "id": 3, "warehouse_id": "3", "name": "New Jersey, NJ", "store_code": "New Jersey", "created_at": "2016-06-15 07:14:35", "updated_at": null }, { "id": 4, "warehouse_id": "4", "name": "Natick, MA", "store_code": "Natick", "created_at": "2016-06-15 07:14:55", "updated_at": null }, { "id": 6, "warehouse_id": "6", "name": "Miami, FLG", "store_code": "BBEV", "created_at": "2016-06-15 07:15:19", "updated_at": null },......中显示的数据列表，我想要添加一个自定义数据位于列表的第一位。

我的JSON：

ArrayList

问题：

如果我首先将自定义数据添加到ArrayList，然后我会解析   json，它覆盖了自定义数据＆amp;仅显示数据   来自API。

如果我首先解析JSON＆amp;然后我将数据添加到spinner然后   注意到List<DashBoardSpinner> mList;。

在GSON中，不需要创建ArrayList对象：

List<DashBoardSpinner> mList = new ArrayList<>();

但是我必须添加第一行自定义API数据，所以我创建了ArrayList的新对象。

import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

public class DashBoardSpinner {

    @SerializedName("id")
    @Expose
    private int id;
    @SerializedName("warehouse_id")
    @Expose
    private String warehouseId;
    @SerializedName("name")
    @Expose
    private String name;
    @SerializedName("store_code")
    @Expose
    private String storeCode;
    @SerializedName("created_at")
    @Expose
    private String createdAt;
    @SerializedName("updated_at")
    @Expose
    private Object updatedAt;

    public DashBoardSpinner(int id, String warehouse_id, String name, String store_code) {
        this.id = id;
        this.warehouseId = warehouse_id;
        this.name = name;
        this.storeCode = store_code;

    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getWarehouseId() {
        return warehouseId;
    }

    public void setWarehouseId(String warehouseId) {
        this.warehouseId = warehouseId;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getStoreCode() {
        return storeCode;
    }

    public void setStoreCode(String storeCode) {
        this.storeCode = storeCode;
    }

    public String getCreatedAt() {
        return createdAt;
    }

    public void setCreatedAt(String createdAt) {
        this.createdAt = createdAt;
    }

    public Object getUpdatedAt() {
        return updatedAt;
    }

    public void setUpdatedAt(Object updatedAt) {
        this.updatedAt = updatedAt;
    }

    @Override
    public String toString() {
        return name;
    }

}

DashBoardSpinner :( POJO班级）

List<DashBoardSpinner> mList = new ArrayList<>();


 Gson gson = new Gson();
                            Type listType = new TypeToken<List<DashBoardSpinner>>() {
                            }.getType();
                            mList = gson.fromJson(response.toString(), listType);
                            Log.e("SIZE",""+mList.size());
                            Log.e("FirstItem",""+mList.get(0).getName());

                            //Custom Adding Data to ArrayList
                            DashBoardSpinner listFirst = new DashBoardSpinner(0,"0","All Warehouses","All Warehouses");
                            mList.add(1,listFirst);

片段类：

["B", "A", "C"]

请告诉我如何使用GSON使用API数据添加自己的自定义数据。谢谢

Answer 1

我不确定你是否能保证从gson获得一个ArrayList。

试试这个：

                            List<DashBoardSpinner> mList = new ArrayList<>();

                            Gson gson = new Gson();
                            Type listType = new TypeToken<List<DashBoardSpinner>>() {
                            }.getType();
                            List<DashboardSpinner> apiList = gson.fromJson(response.toString(), listType);
                            Log.e("SIZE",""+apiList.size());
                            Log.e("FirstItem",""+apiList.get(0).getName());

                            //Custom Adding Data to ArrayList
                            DashBoardSpinner listFirst = new DashBoardSpinner(0,"0","All Warehouses","All Warehouses");
                            mList.add(listFirst);
                            mList.addAll(apiList);

使用Android中的GSON在API数据中添加自定义ArrayList数据

1 个答案: