按照 firebase 數據庫的文檔嘗試將數據檢索到對象以供使用時，我收到錯誤消息。這是我的對象模型public class Cart { private String pid, pname, price, discount, quantity; public Cart() { } public Cart(String pid, String pname, String price, String discount, String quantity) { this.pid = pid; this.pname = pname; this.price = price; this.discount = discount; this.quantity = quantity; } public String getPid() { return pid; } public void setPid(String pid) { this.pid = pid; } public String getPname() { return pname; } public void setPname(String pname) { this.pname = pname; } public String getPrice() { return price; } public void setPrice(String price) { this.price = price; } public String getDiscount() { return discount; } public void setDiscount(String discount) { this.discount = discount; } public String getQuantity() { return quantity; } public void setQuantity(String quantity) { this.quantity = quantity; }}最后，我得到錯誤的代碼和行被注釋掉了。
1 回答
函數式編程
TA貢獻1807條經驗 獲得超9個贊
和是您的 firebase 數據庫中的值quantity，在您的類中它被聲明為. 這是拋出錯誤。像下面這樣聲明類。discountLongCartStringCart
public class Cart {
private String pid, pname, price;
private Long discount, quantity;
public Cart() {
}
public Cart(String pid, String pname, String price, Long discount, Long quantity) {
this.pid = pid;
this.pname = pname;
this.price = price;
this.discount = discount;
this.quantity = quantity;
}
public String getPid() {
return pid;
}
public void setPid(String pid) {
this.pid = pid;
}
public String getPname() {
return pname;
}
public void setPname(String pname) {
this.pname = pname;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
public Long getDiscount() {
return discount;
}
public void setDiscount(Long discount) {
this.discount = discount;
}
public Long getQuantity() {
return quantity;
}
public void setQuantity(Long quantity) {
this.quantity = quantity;
}
}
希望能解決您的問題。
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