简单易用的json解析，json生成器和基于JSONArray和JSONObject for Android的数据存储

本文标签： Android开发技巧json解析Android数据存储

JSON

简单易用的json解析，json生成器和基于JSONArray和JSONObject for Android的数据存储．

添加到项目

To use JSON you must add it as a dependency in your Gradle build:

Step 1. Add the JitPack repository to your build file Add it in your root build.gradle at the end of repositories:

allPRojects {        repositories {            ...            maven { url "https://jitpack.io" }        }    }
Step 2. Add the dependency
dependencies {    compile 'com.github.amirdew:JSON:v1.0.0'}
使用
You can create JSON object from string and access data with key() and index() methods.
String simpleJsonString = "{/"id/":1,/"name/":/"A green door/",/"price/":12.5,/"tags/":[/"home/",/"green/"]}";JSON json = new JSON(simpleJsonString);//access dataString firstTag = json.key("tags").index(0).stringValue();Double price = json.key("price").doubleValue();
products json:
[  {    "id": 2,    "name": "An ice sculpture",    "price": 12.50,    "tags": ["cold", "ice"],    "dimensions": {      "length": 7.0,      "width": 12.0,      "height": 9.5    },    "warehouseLocation": {      "latitude": -78.75,      "longitude": 20.4    }  },  {    "id": 3,    "name": "A blue mouse",    "price": 25.50,    "dimensions": {      "length": 3.1,      "width": 1.0,      "height": 1.0    },    "warehouseLocation": {      "latitude": 54.4,      "longitude": -32.7    }  }]
loop:
for(int i=0; i<products.count(); i++){   json productInfo = products.index(i);   String productName = productInfo.key("name").stringValue();}
JSON is exception and null free, you can use key() and index() many times without worry about any exception.
int someValue = products.index(8).key("someKey").index(1).key("someOther").intValue(); //someValue = 0
check index or key is exist or is null:
if( products.index(3).key("someKey").isNull() ){     /*...*/  }if( products.index(1).key("someKey").exist() ){   /*...*/  }
方法
Method
Input type
Return type
Default
Description
key()
String
JSON
-
if object is a dictionary return JSON object with input key
index()
int
JSON
-
if object is a array return JSON object with input index
stringValue()
-
String
empty string ("")
return .toString() of object
intValue()
-
int
0
return integer value if possible
longValue()
-
long
0
return long value if possible
doubleValue()
-
Double
0
return Double value if possible
booleanValue()
-
boolean
false
return true if object is kind of boolean and true or is kind of string and equal "true"
value()
-
Object
-
return related object
count()
-
int
0
if related object is a dictionary return number of keys, if related object is a array return length of array
isNull()
-
boolean
-
return true if related object is null
exist()
-
boolean
-
return true if related object with index or key exists
getJsonArray()
-
JSONArray
null
return related JSONArray
getJsonObject()
-
JSONObject
null
return related JSONObject
用法 - 生成json，数据保存
You can use JSON.dic() and JSON.array() static methods to generate json string or hold and pass data
JSON generatedJsonObject = JSON.create(                JSON.dic(                        "someKey", "someValue",                        "someArrayKey", JSON.array(                                "first",                                1,                                2,                                JSON.dic(                                        "emptyArrayKey", JSON.array()                                )                        )                )        );  String jsonString = generatedJsonObject.toString();
result:
{  "someKey": "someValue",  "someArrayKey": [    "first",    1,    2,    {      "emptyArrayKey": []    }  ]}
add, edit, remove:
note: now its work for first level only
generatedJsonObject.addEditWithKey("someArrayKey","someOtherValue");
result:
{  "someKey": "someValue",  "someArrayKey": "someOtherValue"}
Available methods - generate, edit, remove
Method
Input type
Description
add()
Object
if current related object is an array add object at end of array
remove()
Object
if current related object is an array and input object exist, remove it from array
addWithIndex()
Object, int
if current related object is an array replace input object with object for input index
addWithIndex()
Object, int
if current related object is an array replace input object with object for input index
removeWithIndex()
int
if current related object is an array remove object for input index
addEditWithKey()
String, Object
if current related object is a dictionary add input object with input key
removeWithKey()
String
if current related object is a dictionary remove object with input key
static create()
Object
create new instance of JSON with input object
static dic()
Object...
if number of input objects is even create JSONObject use even objects as key and odd obejcts as value
static array()
Object...
create JSONArray use input objects
amirdew /JSON
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项目描述：simple and easy json parser, json generator, and data holder based on JSONArray and JSONObject for android —查看更多内容...
本文标签： Android开发技巧json解析Android数据存储 
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原文地址： 《简单易用的json解析，json生成器和基于JSONArray和JSONObject for Android的数据存储》
原文地址：http://whosmall.com/?post=290