Question

我的数据库中有一些测试值，我想在android中获取它们。这是我的数据库中的值的以下JSON输出：

 [{"email_address":"rainier_gaari@hotmail.com","comment":"qwehgashdgaskdaweq","date_comment":"2014-06-21","time_comment":"08:28:00","password":"rainier1990"},
 {"email_address":"rainier_gaari@hotmail.com","comment":"asfasdasdasd","date_comment":"2104-06-12","time_comment":"09:03:00","password":"rainier1990"}
 {"email_address":"rainier_gaari@hotmail.com","comment":"asdsfafd","date_comment":"2014-06-22","time_comment":"04:44:00","password":"rainier1990"}]

但是每次我运行这段代码：http://prntscr.com/3vhs5j时，它只给出了JSON输出的第一行：http://prntscr.com/3vi34b

如何在android中显示所有行（而不是1行）？

Answer 1

如果你把一些代码放在你的问题中来获取JSON，以便更容易引用它会有所帮助，但是，我没有看到循环，这就是它只获得第一行的原因。

您可能想要引用这个问题：JSON Array iteration in Android/Java但基本上使用JSONArray的length属性并循环多次。

Answer 2

您可以使用android API提供的JSONObject。 JSONObject有一个名为getJSONArray（）

的方法

http://developer.android.com/reference/org/json/JSONObject.html#getJSONArray(java.lang.String)

您的错误是您正在使用您的Object实例化JSONArray。你应该试试这个：

JSONArray myArray =jsonObject.getJSONArray();

这是我的一个应用程序的代码片段，可以很好地检索Json数据。

 success = jObject.getInt(TAG_SUCCESS);
 vehicles = jObject.getJSONArray(Vehicle.TAG_VEHICLES);

        if(success == 1) {
            // loop through all the vehicles
            for(int i = 0; i < vehicles.length(); i++) {
                JSONObject obj = vehicles.getJSONObject(i);

                // Get each element based on it's tag
                String year = obj.getString(Vehicle.TAG_YEAR);
                String model = obj.getString(Vehicle.TAG_MODEL);
                String brand = obj.getString(Vehicle.TAG_BRAND);
                String color = obj.getString(Vehicle.TAG_COLOR);
                String license_plate = obj.getString(Vehicle.TAG_LICENSE);
                String main_driver = obj.getString(Vehicle.TAG_DRIVER);
                String policeNumber = obj.getString(Vehicle.TAG_POLICENUMBER);
                String driversLicense = obj.getString(Vehicle.TAG_DRIVER_LICENSE);
                String licenseState = obj.getString(Vehicle.TAG_LICENSE_STATE);
                String driverBirthday = obj.getString(Vehicle.TAG_BIRTHDAY_MONTH) + "/" +
                        obj.getString(Vehicle.TAG_BIRTHDAY_DAY) + "/" +
                        obj.get(Vehicle.TAG_BIRTHDAY_YEAR);
                String driverGender = obj.getString(Vehicle.TAG_DRIVER_GENDER);

                ListRowGroup group = new ListRowGroup(brand + " " + year + " " + model, brand);
                group.children.add(brand + " " + year + " " + model);
                group.children.add(policeNumber);
                group.children.add(model);
                group.children.add(color);
                group.children.add(license_plate);
                group.children.add(main_driver);
                group.children.add(driversLicense + "   -   " + licenseState);
                group.children.add(driverBirthday + "   -   " + driverGender);

                vehiclesGroup.append(i, group);
            }

在Android上获取JSON数组的数据

2 个答案: