gson

Android中使用网络技术

由 孤者浪人 提交于 2020-01-18 19:31:54
使用HttpURLConnection 在过去Android中发送HTTP请求的一般有两种方式：HttpURLConnection和HttpClient。由于HttpClient存在API数量过多，扩展困难等缺点，Android团队不建议我们使用这种方式。后HttpClient的功能被完全移除 下面介绍HttpURLConnection的用法 首先需要获取到HttpURLConnection的实例，一般只需要new出一个URL对象，并传入目标的网络地址，然后调用一下openConnection()方法即可， URL url=new URL(“http://www.baidu.com”); HttpURLConnetion connection=(HttpURLConnection) url.openConnection(); 在得到HttpURLConnection实例后，我们可以设置一下HTTP请求所使用的方法，常用的有GET和POST,GET表示希望从服务器那里获取数据，而POST表示希望提交数据给服务器。写法： connection.setRequestMethod(“GET”); 接下来可以进行一下自由定制了如设置连接超时，读取超时的毫秒数，以及服务器希望得到的一些消息头，这部分内容根据自己的实际情况进行编写， 如下： connection

Android中使用Gson解析JSON数据

由 妖精的绣舞 提交于 2020-01-18 14:16:19
Android中使用Gson解析JSON数据 在Android中可以使用Gson解析JSON数据 首先，从 code.google.com/p/google-gson/downloads/list下载GsonAPI： google-gson-1.7.1-release.zip 把gson-1.7.jar copy到libs(项目根目录新建一个libs文件夹)中。 可以使用以下两种方法解析JSON数据： 通过获取JsonReader对象解析JSON数据： String jsonData = "[{\"username\":\"arthinking\",\"userId\":001},{\"username\":\"Jason\",\"userId\":002}]"; try{ JsonReader reader = new JsonReader(new StringReader(jsonData)); reader.beginArray(); while(reader.hasNext()){ reader.beginObject(); while(reader.hasNext()){ String tagName = reader.nextName(); if(tagName.equals("username")){ System.out.println(reader

Android中Json数据去掉斜杠

由 让人想犯罪 __ 提交于 2020-01-17 12:50:36
数据如下： [ "{\"STCD\":\"172017156159\",\"ItemID\":\"0003002\",\"TM\":\"2020-01-16 19:20:10\",\"NFOINDEX\":0,\"DATAVALUE\":0,\"DATATYPE\":0}", "{\"STCD\":\"172017156159\",\"ItemID\":\"0003003\",\"TM\":\"2020-01-16 19:20:10\",\"NFOINDEX\":0,\"DATAVALUE\":0.8,\"DATATYPE\":0}" ] 　　使用Java中 String str = StringEscapeUtils.unescapeJava(strmes); Android中需要引入 implementation 'org.apache.commons:commons-lang3:3.7' 　　去除斜杠后数据还有引号“”，如 [ "{"STCD":"172017156159","ItemID":"0003002","TM":"2020-01-16 19:20:10","NFOINDEX":0,"DATAVALUE":0,"DATATYPE":0}", "{"STCD":"172017156159","ItemID":"0003003","TM":"2020-01-16 19

Parsing objects in a json array with gson

由 生来就可爱ヽ(ⅴ＜●) 提交于 2020-01-17 08:31:13
问题 I have a restful endpoint which provides the below JSON when performing a GET on the endpoint http://127.0.0.1:4567/suppliers . { "status": "SUCCESS", "jsonapi": { "version": "1.0" }, "data": { "id": 0, "type": "suppliers", "name": "Red Network Energy LTD" } } In the httpPost request I use GSON to parse the above data into the SupplierResponseTest object. When executing: SupplierResponseTest supplierResponse = gson.fromJson(supplierJsonResponse, SupplierResponseTest.class); I get the error:

How to parse this JSON String with GSON?

由 别等时光非礼了梦想. 提交于 2020-01-17 01:41:26
问题 Can't figure out how to parse the following JSON string with GSON into any proper object to retrieve its data. The string is: {"Values":[{"Date":"2014-10-01","Value":386788.0},{"Date":"2014-11-01","Value":429131.0},{"Date":"2014-12-01","Value":215217.0},{"Date":"2015-01-01","Value":270422.0},{"Date":"2015-02-01","Value":261412.0},{"Date":"2015-03-01","Value":354668.0}]} I figured out that square brackets mean that it's an ArrayList, but then there's another object inside. If I try and try to

When I am using Gmail API ,I am getting java.lang.NoClassDefFoundError: com.google.gson.stream.JsonReader

由 我的未来我决定 提交于 2020-01-16 01:17:21
问题 I am following Google Developer's Doc .I have included all mentioned jars but at runtime I getting this.. java.lang.RuntimeException: An error occured while executing doInBackground() 09-19 12:42:06.416: E/AndroidRuntime(14215): at android.os.AsyncTask$3.done(AsyncTask.java:300) 09-19 12:42:06.416: E/AndroidRuntime(14215): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355) 09-19 12:42:06.416: E/AndroidRuntime(14215): at java.util.concurrent.FutureTask.setException

GSON + HTC Desire: Conflict. Possible solution jarjar.jar causes error

由 |▌冷眼眸甩不掉的悲伤 提交于 2020-01-15 19:16:15
问题 I am trying to use GSON in Android app but it causes a crash. After some reading it seems that HTC have included GSON and that causes a conflict. One propoused solution was to use jarjar.jar to rename gson classes to solve the conflict. When I try to do this I get this error: Syntax error: Error on line 1: [{\rtf1\ansi\ansicpg1252\cocoartf1038\cocoasubrtf360] The command I am executing: java -jar jarjar-1.2.jar process rules.txt gson-2.1.jar myjson-2.1.jar rules.txt: rule com.google.gson.**

Parse only one field in a large JSON string

由 |▌冷眼眸甩不掉的悲伤 提交于 2020-01-15 12:27:05
问题 I have a JSON string of the following format: { "foo": "small_vale" "baz": "large_value" "bar": "another_large_value" } How can I efficiently extract foo while ignoring the rest of the fields? Basically, I'm using Gson and I defined a "lean class" like that: MyClass { private String foo; } If I'm ensuring that foo appears first in the JSON string, would Gson still scan the whole string, or is it smart enough to stop? Should I use JsonPath instead? 回答1: To answer on this question we need to

Gson.toJson(Object) returning object hash code

由 |▌冷眼眸甩不掉的悲伤 提交于 2020-01-15 11:26:08
问题 I'm trying to transform this class below using the Gson.ToJson(Object) method, but it is returing me the object hash code of the class, eg: br.com.helpradar.entity.User@475fdaaa However, I can retrieve the user.expertise without any problems and with all the relationships: Gson.ToJson(user.getExpertise) @Entity @SequenceGenerator(name="seqUser", sequenceName="SEQ_USER", allocationSize=1) public class User { @Id private Long id; @Column(nullable=false) private String name; @OneToOne private

Nested Json parsing with GSon

由 梦想与她 提交于 2020-01-15 10:00:08
问题 How to parse below Json Response with google Gson.? { "rootobject":[ { "id":"7", "name":"PP-1", "subtitle":"name-I", "key1":"punjab", "key12":"2013", "location":"", "key13":"0", "key14":"0", "key15":"0", "result_status":null }, { "id":"7", "name":"PP-1", "subtitle":"name-I", "key1":"punjab", "key12":"2013", "location":"", "key13":"0", "key14":"0", "key15":"0", "result_status":null }, { "id":"7", "name":"PP-1", "subtitle":"name-I", "key1":"punjab", "key12":"2013", "location":"", "key13":"0",
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