如何访问 JSON 值？
[英]How to access JSON values?
问题描述
Im writing an Android program and need to access some values.
我正在编写一个 Android 程序并且需要访问一些值。 How would I access Duration Under the Chevorlet Volt in the 0 index for 120.?如何在 0 索引中访问雪佛兰 Volt 下的持续时间为 120。？ I already have it stored in a JSONObject using..我已经使用..将它存储在 JSONObject 中
vech = context.getAssets().open("vec9.json");
String s = convertStreamToString(vech);
try {
Vehicles = new JSONObject(s);
} catch (JSONException e) {
e.printStackTrace();
}
JSON code... JSON 代码...
{"root": {
"FORM": {
"FORM_INIT": {
"@attributes": {
"mdd": "20",
"cost": "2.85",
"mpg": "24"
}
}
},
"VEHICLES": {
"VEHICLE": [
{
"@attributes": {
"index": "0",
"desc": "Chevrolet Volt",
"energy": "12",
"sac": "72",
"divisor": "40"
},
"KWH": [
{
"@attributes": {
"index": "0",
"level": "120",
"duration": "10"
},
"KWH_PCT": {
"START": [
{
"@attributes": {
"time": "0",
"sum_idx_0": "70",
"sum_idx_1": "30",
"sum_idx_2": "0",
"win_idx_0": "70",
"win_idx_2": "30"
}
},
{
"@attributes": {
"time": "1",
"sum_idx_0": "60",
"sum_idx_1": "40",
"sum_idx_2": "0",
"win_idx_0": "60",
"win_idx_2": "40"
}
},
{
"@attributes": {
"time": "2",
"sum_idx_0": "50",
"sum_idx_1": "50",
"sum_idx_2": "0",
"win_idx_0": "50",
"win_idx_2": "50"
}
},
{
"@attributes": {
"time": "3",
"sum_idx_0": "40",
"sum_idx_1": "60",
"sum_idx_2": "0",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "4",
"sum_idx_0": "30",
"sum_idx_1": "70",
"sum_idx_2": "0",
"win_idx_0": "30",
"win_idx_2": "70"
}
},
{
"@attributes": {
"time": "5",
"sum_idx_0": "20",
"sum_idx_1": "70",
"sum_idx_2": "10",
"win_idx_0": "20",
"win_idx_2": "80"
}
},
{
"@attributes": {
"time": "6",
"sum_idx_0": "10",
"sum_idx_1": "70",
"sum_idx_2": "20",
"win_idx_0": "10",
"win_idx_2": "90"
}
},
{
"@attributes": {
"time": "7",
"sum_idx_0": "0",
"sum_idx_1": "70",
"sum_idx_2": "30",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "8",
"sum_idx_0": "0",
"sum_idx_1": "60",
"sum_idx_2": "40",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "9",
"sum_idx_0": "0",
"sum_idx_1": "60",
"sum_idx_2": "40",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "10",
"sum_idx_0": "0",
"sum_idx_1": "60",
"sum_idx_2": "40",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "11",
"sum_idx_0": "0",
"sum_idx_1": "60",
"sum_idx_2": "40",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "12",
"sum_idx_0": "0",
"sum_idx_1": "60",
"sum_idx_2": "40",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "13",
"sum_idx_0": "0",
"sum_idx_1": "60",
"sum_idx_2": "40",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "14",
"sum_idx_0": "10",
"sum_idx_1": "50",
"sum_idx_2": "40",
"win_idx_0": "10",
"win_idx_2": "90"
}
},
{
"@attributes": {
"time": "15",
"sum_idx_0": "20",
"sum_idx_1": "50",
"sum_idx_2": "30",
"win_idx_0": "20",
"win_idx_2": "80"
}
},
{
"@attributes": {
"time": "16",
"sum_idx_0": "30",
"sum_idx_1": "50",
"sum_idx_2": "20",
"win_idx_0": "30",
"win_idx_2": "70"
}
},
{
"@attributes": {
"time": "17",
"sum_idx_0": "40",
"sum_idx_1": "50",
"sum_idx_2": "10",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "18",
"sum_idx_0": "50",
"sum_idx_1": "50",
"sum_idx_2": "0",
"win_idx_0": "50",
"win_idx_2": "50"
}
},
{
"@attributes": {
"time": "19",
"sum_idx_0": "60",
"sum_idx_1": "40",
"sum_idx_2": "0",
"win_idx_0": "60",
"win_idx_2": "40"
}
},
{
"@attributes": {
"time": "20",
"sum_idx_0": "70",
"sum_idx_1": "30",
"sum_idx_2": "0",
"win_idx_0": "70",
"win_idx_2": "30"
}
},
{
"@attributes": {
"time": "21",
"sum_idx_0": "80",
"sum_idx_1": "20",
"sum_idx_2": "0",
"win_idx_0": "80",
"win_idx_2": "20"
}
},
{
"@attributes": {
"time": "22",
"sum_idx_0": "80",
"sum_idx_1": "20",
"sum_idx_2": "0",
"win_idx_0": "80",
"win_idx_2": "20"
}
},
{
"@attributes": {
"time": "23",
"sum_idx_0": "80",
"sum_idx_1": "20",
"sum_idx_2": "0",
"win_idx_0": "80",
"win_idx_2": "20"
}
}
]
}
},
{
"@attributes": {
"index": "1",
"level": "240",
"duration": "4"
},
"KWH_PCT": {
"START": [
{
"@attributes": {
"time": "0",
"sum_idx_0": "100",
"sum_idx_1": "0",
"sum_idx_2": "0",
"win_idx_0": "100",
"win_idx_2": "0"
}
},
{
"@attributes": {
"time": "1",
"sum_idx_0": "100",
"sum_idx_1": "0",
"sum_idx_2": "0",
"win_idx_0": "100",
"win_idx_2": "0"
}
},
{
"@attributes": {
"time": "2",
"sum_idx_0": "100",
"sum_idx_1": "0",
"sum_idx_2": "0",
"win_idx_0": "100",
"win_idx_2": "0"
}
},
{
"@attributes": {
"time": "3",
"sum_idx_0": "100",
"sum_idx_1": "0",
"sum_idx_2": "0",
"win_idx_0": "100",
"win_idx_2": "0"
}
},
{
"@attributes": {
"time": "4",
"sum_idx_0": "75",
"sum_idx_1": "25",
"sum_idx_2": "0",
"win_idx_0": "75",
"win_idx_2": "25"
}
},
{
"@attributes": {
"time": "5",
"sum_idx_0": "50",
"sum_idx_1": "50",
"sum_idx_2": "0",
"win_idx_0": "50",
"win_idx_2": "50"
}
},
{
"@attributes": {
"time": "6",
"sum_idx_0": "25",
"sum_idx_1": "75",
"sum_idx_2": "0",
"win_idx_0": "25",
"win_idx_2": "75"
}
},
{
"@attributes": {
"time": "7",
"sum_idx_0": "0",
"sum_idx_1": "100",
"sum_idx_2": "0",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "8",
"sum_idx_0": "0",
"sum_idx_1": "100",
"sum_idx_2": "0",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "9",
"sum_idx_0": "0",
"sum_idx_1": "100",
"sum_idx_2": "0",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "10",
"sum_idx_0": "0",
"sum_idx_1": "100",
"sum_idx_2": "0",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "11",
"sum_idx_0": "0",
"sum_idx_1": "75",
"sum_idx_2": "25",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "12",
"sum_idx_0": "0",
"sum_idx_1": "50",
"sum_idx_2": "50",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "13",
"sum_idx_0": "0",
"sum_idx_1": "25",
"sum_idx_2": "75",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "14",
"sum_idx_0": "0",
"sum_idx_1": "0",
"sum_idx_2": "100",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "15",
"sum_idx_0": "0",
"sum_idx_1": "25",
"sum_idx_2": "75",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "16",
"sum_idx_0": "0",
"sum_idx_1": "50",
"sum_idx_2": "50",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "17",
"sum_idx_0": "0",
"sum_idx_1": "75",
"sum_idx_2": "25",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "18",
"sum_idx_0": "0",
"sum_idx_1": "100",
"sum_idx_2": "0",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "19",
"sum_idx_0": "0",
"sum_idx_1": "100",
"sum_idx_2": "0",
"win_idx_0": "0",
"win_idx_2": "100"
}
},
{
"@attributes": {
"time": "20",
"sum_idx_0": "25",
"sum_idx_1": "75",
"sum_idx_2": "0",
"win_idx_0": "25",
"win_idx_2": "75"
}
},
{
"@attributes": {
"time": "21",
"sum_idx_0": "50",
"sum_idx_1": "50",
"sum_idx_2": "0",
"win_idx_0": "50",
"win_idx_2": "50"
}
},
{
"@attributes": {
"time": "22",
"sum_idx_0": "75",
"sum_idx_1": "25",
"sum_idx_2": "0",
"win_idx_0": "75",
"win_idx_2": "25"
}
},
{
"@attributes": {
"time": "23",
"sum_idx_0": "100",
"sum_idx_1": "0",
"sum_idx_2": "0",
"win_idx_0": "100",
"win_idx_2": "0"
}
}
]
}
}
]
},
{
"@attributes": {
"index": "1",
"desc": "Nissan Leaf",
"energy": "24",
"sac": "72",
"divisor": "100"
},
"KWH": [
{
"@attributes": {
"index": "0",
"level": "120",
"duration": "20"
},
"KWH_PCT": {
"START": [
{
"@attributes": {
"time": "0",
"sum_idx_0": "35",
"sum_idx_1": "45",
"sum_idx_2": "20",
"win_idx_0": "35",
"win_idx_2": "65"
}
},
{
"@attributes": {
"time": "1",
"sum_idx_0": "30",
"sum_idx_1": "50",
"sum_idx_2": "20",
"win_idx_0": "30",
"win_idx_2": "70"
}
},
{
"@attributes": {
"time": "2",
"sum_idx_0": "25",
"sum_idx_1": "55",
"sum_idx_2": "20",
"win_idx_0": "25",
"win_idx_2": "75"
}
},
{
"@attributes": {
"time": "3",
"sum_idx_0": "20",
"sum_idx_1": "60",
"sum_idx_2": "20",
"win_idx_0": "20",
"win_idx_2": "80"
}
},
{
"@attributes": {
"time": "4",
"sum_idx_0": "20",
"sum_idx_1": "60",
"sum_idx_2": "20",
"win_idx_0": "20",
"win_idx_2": "80"
}
},
{
"@attributes": {
"time": "5",
"sum_idx_0": "20",
"sum_idx_1": "60",
"sum_idx_2": "20",
"win_idx_0": "20",
"win_idx_2": "80"
}
},
{
"@attributes": {
"time": "6",
"sum_idx_0": "20",
"sum_idx_1": "60",
"sum_idx_2": "20",
"win_idx_0": "20",
"win_idx_2": "80"
}
},
{
"@attributes": {
"time": "7",
"sum_idx_0": "20",
"sum_idx_1": "60",
"sum_idx_2": "20",
"win_idx_0": "20",
"win_idx_2": "80"
}
},
{
"@attributes": {
"time": "8",
"sum_idx_0": "25",
"sum_idx_1": "55",
"sum_idx_2": "20",
"win_idx_0": "25",
"win_idx_2": "75"
}
},
{
"@attributes": {
"time": "9",
"sum_idx_0": "30",
"sum_idx_1": "50",
"sum_idx_2": "20",
"win_idx_0": "30",
"win_idx_2": "70"
}
},
{
"@attributes": {
"time": "10",
"sum_idx_0": "35",
"sum_idx_1": "45",
"sum_idx_2": "20",
"win_idx_0": "35",
"win_idx_2": "65"
}
},
{
"@attributes": {
"time": "11",
"sum_idx_0": "40",
"sum_idx_1": "40",
"sum_idx_2": "20",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "12",
"sum_idx_0": "40",
"sum_idx_1": "40",
"sum_idx_2": "20",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "13",
"sum_idx_0": "40",
"sum_idx_1": "40",
"sum_idx_2": "20",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "14",
"sum_idx_0": "40",
"sum_idx_1": "40",
"sum_idx_2": "20",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "15",
"sum_idx_0": "40",
"sum_idx_1": "45",
"sum_idx_2": "15",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "16",
"sum_idx_0": "40",
"sum_idx_1": "50",
"sum_idx_2": "10",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "17",
"sum_idx_0": "40",
"sum_idx_1": "55",
"sum_idx_2": "5",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "18",
"sum_idx_0": "40",
"sum_idx_1": "60",
"sum_idx_2": "0",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "19",
"sum_idx_0": "40",
"sum_idx_1": "55",
"sum_idx_2": "5",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "20",
"sum_idx_0": "40",
"sum_idx_1": "50",
"sum_idx_2": "10",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "21",
"sum_idx_0": "40",
"sum_idx_1": "45",
"sum_idx_2": "15",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "22",
"sum_idx_0": "40",
"sum_idx_1": "40",
"sum_idx_2": "20",
"win_idx_0": "40",
"win_idx_2": "60"
}
},
{
"@attributes": {
"time": "23",
"sum_idx_0": "40",
"sum_idx_1": "40",
"sum_idx_2": "20",
"win_idx_0": "40",
"win_idx_2": "60"
}
}
]
}
},
{
"@attributes": {
"index": "1",
"level": "240",
"duration": "8"
},
"KWH_PCT": {
"START": [
{
"@attributes": {
"time": "0",
"sum_idx_0": "87",
"sum_idx_1": "13",
"sum_idx_2": "0",
"win_idx_0": "87",
"win_idx_2": "13"
}
},
{
"@attributes": {
"time": "1",
"sum_idx_0": "75",
"sum_idx_1": "25",
"sum_idx_2": "0",
"win_idx_0": "75",
"win_idx_2": "25"
}
},
{
"@attributes": {
"time": "2",
"sum_idx_0": "63",
"sum_idx_1": "37",
"sum_idx_2": "0",
"win_idx_0": "63",
"win_idx_2": "37"
}
},
{
"@attributes": {
"time": "3",
"sum_idx_0": "50",
"sum_idx_1": "50",
"sum_idx_2": "0",
"win_idx_0": "50",
"win_idx_2": "50"
}
},
{
"@attributes": {
"time": "4",
"sum_idx_0": "37",
"sum_idx_1": "63",
"sum_idx_2": "0",
"win_idx_0": "37",
"win_idx_2": "63"
}
},
{
"@attributes": {
"time": "5",
"sum_idx_0": "25",
"sum_idx_1": "75",
"sum_idx_2": "0",
"win_idx_0": "25",
"win_idx_2": "75"
}
},
{
"@attributes": {
"time": "6",
"sum_idx_0": "13",
"sum_idx_1": "87",
"sum_idx_2": "0",
"win_idx_0": "13",
"win_idx_2": "87"
}
.......
2 个解决方案
解决方案1
2 2011-07-11 13:16:45
What have you tried so far?你试过什么了？
You will probably end up parsing the data with a library, most likely the org.json package that already comes with Android.您最终可能会使用库来解析数据，很可能是Android附带的 org.json package。 Using the JSONTokener, you can parse the data you receive into a JSONObject, then descend into that object to find the exact values that you want.使用 JSONTokener，您可以将收到的数据解析为 JSONObject，然后深入到该 object 以找到您想要的确切值。
解决方案2
2 已采纳 2011-07-11 13:29:36
There is a terrific tutorial for that using GSON有一个很棒的教程使用 GSON
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