Question

我正在使用app，我必须在JSON下解析。

任何人都可以告诉我该怎么做？

{
    "navigation_entries": {
        "home": {
            "children": [
                "favorites",
                "calendar",
                "offers",
                "wineries",
                "dining",
                "lodging",
                "things_to_do",
                "weather",
                "settings"
            ],
            "banner_image": "home_page_banner",
            "icon": {
                "small": "icon_home_small",
                "large": "icon_home_large"
            },
            "type": "home_page",
            "forward_icon": {
                "small": "icon_right_arrow_small",
                "large": "icon_right_arrow_large"
            },
            "link_name": "Home"
        },
        "wineries": {
            "display_name": "Wineries",
            "icon": {
                "small": "icon_wineries_small",
                "large": "icon_wineries_large"
            },
            "line_template": "wineries_list_template",
            "forward_icon": {
                "small": "icon_right_arrow_small",
                "large": "icon_right_arrow_large"
            },
            "link_name": "Wineries",
            "type": "leaf_list",
            "leaf_template": "wineries_leaf_template",
            "section": "wineries"
        },
        "dining": {
            "display_name": "Dining",
            "icon": {
                "small": "icon_dining_small",
                "large": "icon_dining_large"
            },
            "line_template": "dining_list_template",
            "forward_icon": {
                "small": "icon_right_arrow_small",
                "large": "icon_right_arrow_large"
            },
            "link_name": "Dining",
            "type": "leaf_list",
            "leaf_template": "dining_leaf_template",
            "section": "dining"
        },
        "offers_dining": {
            "display_name": "Offers => Dining",
            "list_name": "Dining",
            "line_template": "offers_dining_list_template",
            "type": "leaf_list",
            "leaf_template": "offers_dining_leaf_template",
            "forward_icon": {
                "small": "icon_right_arrow_small",
                "large": "icon_right_arrow_large"
            },
            "section": "offers_dining"
        },
        "favorites": {
            "display_name": "Favorites",
            "icon": {
                "small": "icon_favorites_small",
                "large": "icon_favorites_large"
            },
            "type": "favorites",
            "forward_icon": {
                "small": "icon_right_arrow_small",
                "large": "icon_right_arrow_large"
            },
            "link_name": "Favorites"
        },
        "offers": {
            "display_name": "Offers",
            "children": [
                "offers_wineries",
                "offers_dining",
                "offers_lodging",
                "offers_things_to_do"
            ],
            "icon": {
                "small": "icon_offers_small",
                "large": "icon_offers_large"
            },
            "type": "navigation_list",
            "forward_icon": {
                "small": "icon_right_arrow_small",
                "large": "icon_right_arrow_large"
            },
            "link_name": "Offers"
        }
    },
    "type": "navigation"
}

Answer 1

您可以使用this website格式化JSON字符串，以便更轻松地查看它。 Android提供了一个合适的库，可以满足您的需求。

This是了解如何使用Android JSON API所需的手册页。

而且here你可以看到一个教程来了解如何解析JSON字符串。

{
    "glossary": {
        "title": "example glossary",
        "GlossDiv": {
            "title": "S",
            "GlossList": {
                "GlossEntry": {
                    "ID": "SGML",
                    "SortAs": "SGML",
                    "GlossTerm": "Standard Generalized Markup Language",
                    "Acronym": "SGML",
                    "Abbrev": "ISO 8879:1986",
                    "GlossDef": {
                        "para": "A meta-markup language, used to create markup languages such as DocBook.",
                        "GlossSeeAlso": ["GML", "XML"]
                    },
                    "GlossSee": "markup"
                }
            }
        }
    }
}

如果上面的例子是你的字符串，你可以解析它将它传递给JSONObject构造函数：

String jsonString = "...."; // the above string
try {
    JSONObject obj = new JSONObject(jsonString);
} catch (JSONException e) {
    // This exception is thrown if jsonString is not correctly formatted
}

现在，如果你想让JSONObject标记为“GlossList”，在上面的字符串中，你可以这样做：

JSONObject glossList = obj.getJSONObject("glossary").getJSONObject("GlossDiv").getJSONObject("GlossList");

还有另一种可能性：你也可以获得一些JSONArray。在我们的示例中，数组GlossSeeAlso：

JSONArray glossSee = glossList.getJSONObject("GlossEntry").getJSONObject("GlossDef").getJSONArray("GlossSeeAlso");

要直接获取此数组的值，可以使用方法getString(int i);如果数组的争用是JSONObject，则可以使用方法getJSONObject(int i)。您还可以使用方法getString(String lable)直接获取JSONObject中的字符串：

String title = glossDive.getString("title");
String firstElement = glossSee.getString(0);

official JSON site中提供了其他示例。

Answer 2

您可以像这样使用JSONObject和JSONTokener：

String json = "{"
     + "  \"query\": \"Pizza\", "
     + "  \"locations\": [ 94043, 90210 ] "
     + "}";

JSONObject object = (JSONObject) new JSONTokener(json).nextValue();
String query = object.getString("query");
JSONArray locations = object.getJSONArray("locations");

Answer 3

jsonlint.com有一个非常好的json格式化程序。这应该使您的文字易于理解。

用于解析此数据，您可以使用JSONObject（org.json.JSONObject）

我该如何解析这个JSON字符串？

3 个答案: