我通过 DashboardResponse 的改造得到的 JSON 响应在 textview

Question

nullPointerException当我尝试从响应中将数据设置为文本视图时，我JSON正在接受改造。我想将总销售额、总费用和总购买值设置为 textviews：tv_total_purchase_today、tv_total_sale_today、tv_total_expense_today

我应该在 setsaleInformations 方法中添加什么？

这是我的代码： API 响应

public class DashboardResponse extends CommonResponse {

@Expose

@SerializedName("graph_data")

private ArrayList<Graph> graph_data;

@Expose

@SerializedName("total_sale")

private String total_sale;

@Expose

@SerializedName("total_purchase")

private String total_purchase;

@Expose

@SerializedName("total_expense")

private String total_expense;

public ArrayList<Graph> getGraph_data() {

    return graph_data;

}

public void setGraph_data(ArrayList<Graph> graph_data) {

    this.graph_data = graph_data;

}

public String getTotal_sale() {

    return total_sale;

}

public void setTotal_sale(String total_sale) {

    this.total_sale = total_sale;

}

public String getTotal_purchase() {

    return total_purchase;

}

public void setTotal_purchase(String total_purchase) {

    this.total_purchase = total_purchase;

}

public String getTotal_expense() {

    return total_expense;

}

public void setTotal_expense(String total_expense) {

    this.total_expense = total_expense;

}

}

Answer 1

这意味着文本视图尚未加载到屏幕上，或者视图尚未初始化。