OkHttp是Google推薦使用的一個開源的網絡請求框架,Android開發中涉及到網絡請求和接口調用如今大部分都是使用OkHttp,網上已經有很多人針對OkHttp進行了封裝,這裏推薦一下鴻洋大神的okhttputils,這是針對OkHttp進行的封裝,使用起來特別方便,下載地址:https://github.com/hongyangAndroid/okhttputils。java
fastjson是一個針對json格式數據的解析處理框架,下載地址:https://github.com/alibaba/fastjson,Android端和服務端進行交互時,數據傳輸格式通常都採用JSON格式,對於JSON數據的解析,在Android端一般用gson解析,固然也能夠fastjson去解析數據,今天就來學習和總結一下如何使用fastjson去解析json格式數據。android
首先在 build.gradle 引入okhttputils和fastjson,git
配置以下:github
compile 'com.zhy:okhttputils:2.6.2'json
compile 'com.alibaba:fastjson:1.1.56.android'tomcat
okHttpUtils須要先初始化纔可以使用,那麼什麼時機初始化最合適呢,最好的時機就是在App啓動的時候就完成初始化工做,天然而然咱們想到了用Android提供的Application類去作這件事,Application是android框架的一個系統組件,當android程序啓動時系統會建立一個 application對象,用來存儲系統的一些信息。一般咱們是不須要指定一個Application的,這時系統會自動幫咱們建立,若是須要建立本身 的Application,也很簡單,建立一個類繼承 Application並在manifest的application標籤中進行註冊(只須要給Application標籤增長個name屬性把本身的 Application的名字定入便可)。服務器
新建一個MyApplication類,繼承Application,重寫onCreate方法,而後在onCreate方法中完成對okHttpUtils的初始化工做,代碼以下所示:網絡
1 package com.nyl.okhttputilstest; 2 3 import android.app.Application; 4 5 import com.zhy.http.okhttp.OkHttpUtils; 6 7 import java.util.concurrent.TimeUnit; 8 9 import okhttp3.OkHttpClient; 10 11 /** 12 * 定義一個Application 13 */ 14 15 public class MyApplication extends Application{ 16 17 @Override 18 public void onCreate() { 19 super.onCreate(); 20 /** 21 * 初始化OkHttpUtils 22 */ 23 initOkHttpClient(); 24 } 25 26 private void initOkHttpClient() { 27 OkHttpClient okHttpClient = new OkHttpClient.Builder() 28 .connectTimeout(10000L, TimeUnit.MILLISECONDS) //連接超時 29 .readTimeout(10000L,TimeUnit.MILLISECONDS) //讀取超時 30 .build(); //其餘配置 31 32 OkHttpUtils.initClient(okHttpClient); 33 } 34 }
注意:MyApplication類須要在AndroidManifest.xml配置纔會生效,以下圖:app
接下來就可使用okHttpUtils處理網絡請求了,修改HomeFragment類,代碼以下所示:框架
1 package com.nyl.shoppingmall.home.fragment; 2 3 import android.support.v7.widget.RecyclerView; 4 import android.util.Log; 5 import android.view.View; 6 import android.widget.ImageView; 7 import android.widget.TextView; 8 import android.widget.Toast; 9 10 import com.alibaba.fastjson.JSON; 11 import com.nyl.shoppingmall.R; 12 import com.nyl.shoppingmall.base.BaseFragment; 13 import com.nyl.shoppingmall.home.bean.ResultBeanData; 14 import com.nyl.shoppingmall.utils.Constans; 15 import com.zhy.http.okhttp.OkHttpUtils; 16 import com.zhy.http.okhttp.callback.StringCallback; 17 18 import okhttp3.Call; 19 20 /** 21 * 首頁Fragment 22 */ 23 public class HomeFragment extends BaseFragment implements View.OnClickListener { 24 25 private final static String TAG = HomeFragment.class.getSimpleName(); 26 27 private TextView tv_search_home; 28 private TextView tv_message_home; 29 private RecyclerView rv_home; 30 private ImageView ib_top; 31 //返回的數據 32 private ResultBeanData.ResultBean resultBean; 33 34 @Override 35 public View initView() { 36 Log.e(TAG,"主頁面的Fragment的UI被初始化了"); 37 View view = View.inflate(mContext,R.layout.fragment_home,null); 38 //初始化佈局控件 39 tv_search_home = (TextView) view.findViewById(R.id.tv_search_home); 40 tv_message_home = (TextView) view.findViewById(R.id.tv_message_home); 41 rv_home = (RecyclerView) view.findViewById(R.id.rv_home); 42 ib_top = (ImageView) view.findViewById(R.id.ib_top); 43 44 //設置點擊事件 45 ib_top.setOnClickListener(this); 46 tv_search_home.setOnClickListener(this); 47 tv_message_home.setOnClickListener(this); 48 return view; 49 } 50 51 52 @Override 53 public void initData() { 54 super.initData(); 55 Log.e(TAG,"主頁面的Fragment的數據被初始化了"); 56 57 //聯網請求首頁數據 58 getDataFromNet(); 59 } 60 61 private void getDataFromNet() { 62 String url = Constans.HOME_URL; 63 OkHttpUtils 64 .get() 65 .url(url) 66 .build() 67 .execute(new StringCallback() 68 { 69 70 /** 71 * 請求失敗的時候回調 72 * @param call 73 * @param e 74 * @param id 75 */ 76 @Override 77 public void onError(Call call, Exception e, int id) { 78 79 Log.e(TAG,"首頁請求失敗=="+e.getMessage()); 80 } 81 82 /** 83 * 當請求成功的時候回調 84 * @param response 請求成功數據 85 * @param id 86 */ 87 @Override 88 public void onResponse(String response, int id) { 89 90 Log.e(TAG,"首頁請求成功=="+response); 91 //解析數據 92 processData(response); 93 } 94 }); 95 } 96 97 private void processData(String json) {
//使用FastJson去解析Json數據,將json字符串轉換成一個ResultBeanData對象 98 ResultBeanData resultBeanData = JSON.parseObject(json,ResultBeanData.class); 99 resultBean = resultBeanData.getResult(); 100 Log.e(TAG,"解析成功=="+resultBean.getHot_info().get(0).getName()); 101 } 102 103 @Override 104 public void onClick(View view) { 105 switch (view.getId()){ 106 case R.id.ib_top: //置頂的監聽 107 rv_home.scrollToPosition(0); 108 break; 109 case R.id.tv_search_home: //搜索的監聽 110 Toast.makeText(mContext,"搜索",Toast.LENGTH_SHORT).show(); 111 break; 112 case R.id.tv_message_home: //消息監聽 113 Toast.makeText(mContext,"進入消息中心",Toast.LENGTH_SHORT).show(); 114 break; 115 } 116 } 117 }
咱們在initData()中調用getDataFromNet方法聯網請求數據,getDataFromNet方法內部調用okHttpUtils發起異步網絡請求,okHttpUtils經過一個StringCallBack來通知調用者本次網絡請求的結果,當請求失敗的時候回調onError方法,用來通知調用者網絡請求失敗,當請求成功的時候回調onResponse方法,用來通知調用者網絡請求成功,咱們就能夠在onResponse方法中接收服務器返回的數據,而後根據咱們的需求處理數據。
爲了方便管理接口請求的URL地址,咱們將URL地址統一配置在Constans類中,代碼以下所示:
1 package com.nyl.shoppingmall.utils; 2 3 /** 4 * 配置各個頁面聯網地址 5 */ 6 7 public class Constans { 8 9 //首頁路徑 10 public static String HOME_URL = "http://192.168.1.108:8080/atguigu/json/HOME_URL.json"; 11 }
這裏我使用的是我本地的服務器IP地址,那麼如何查看本地的服務器IP地址呢,打開命令行,輸入ipconfig,以下圖:
因爲在本地請求,記得開tomcat服務器,咱們試着用http://192.168.1.108:8080/atguigu/json/HOME_URL.json在瀏覽去中打開,若地址是正確的,以下圖:
最後不要忘記加網絡權限:<uses-permission android:name="android.permission.INTERNET"/>
運行程序,效果以下圖:
咱們在請求成功的時候回調的onResponse方法裏去接收服務器返回的json格式數據,而後經過Fastjson將json數據解析成一個ResultBeanData對象。
ResultBeanData類的代碼以下所示:
1 package com.nyl.shoppingmall.home.bean; 2 3 import java.util.List; 4 5 /** 6 * Created by Administrator on 2017/3/21 0021. 7 */ 8 9 public class ResultBeanData { 10 11 /** 12 * code : 200 13 * msg : 請求成功 14 * 15 */ 16 17 private int code; 18 private String msg; 19 private ResultBean result; 20 21 public void setCode(int code) { 22 this.code = code; 23 } 24 25 public void setMsg(String msg) { 26 this.msg = msg; 27 } 28 29 public void setResult(ResultBean result) { 30 this.result = result; 31 } 32 33 public int getCode() { 34 return code; 35 } 36 37 public String getMsg() { 38 return msg; 39 } 40 41 public ResultBean getResult() { 42 return result; 43 } 44 45 public static class ResultBean { 46 47 private SeckillInfoEntity seckill_info; 48 private List<ActInfoEntity> act_info; 49 private List<BannerInfoEntity> banner_info; 50 private List<ChannelInfoEntity> channel_info; 51 private List<HotInfoEntity> hot_info; 52 private List<RecommendInfoEntity> recommend_info; 53 54 public void setSeckill_info(SeckillInfoEntity seckill_info) { 55 this.seckill_info = seckill_info; 56 } 57 58 public void setAct_info(List<ActInfoEntity> act_info) { 59 this.act_info = act_info; 60 } 61 62 public void setBanner_info(List<BannerInfoEntity> banner_info) { 63 this.banner_info = banner_info; 64 } 65 66 public void setChannel_info(List<ChannelInfoEntity> channel_info) { 67 this.channel_info = channel_info; 68 } 69 70 public void setHot_info(List<HotInfoEntity> hot_info) { 71 this.hot_info = hot_info; 72 } 73 74 public void setRecommend_info(List<RecommendInfoEntity> recommend_info) { 75 this.recommend_info = recommend_info; 76 } 77 78 public SeckillInfoEntity getSeckill_info() { 79 return seckill_info; 80 } 81 82 public List<ActInfoEntity> getAct_info() { 83 return act_info; 84 } 85 86 public List<BannerInfoEntity> getBanner_info() { 87 return banner_info; 88 } 89 90 public List<ChannelInfoEntity> getChannel_info() { 91 return channel_info; 92 } 93 94 public List<HotInfoEntity> getHot_info() { 95 return hot_info; 96 } 97 98 public List<RecommendInfoEntity> getRecommend_info() { 99 return recommend_info; 100 } 101 102 public static class SeckillInfoEntity { 103 104 private String end_time; 105 private String start_time; 106 private List<ListEntity> list; 107 108 public void setEnd_time(String end_time) { 109 this.end_time = end_time; 110 } 111 112 public void setStart_time(String start_time) { 113 this.start_time = start_time; 114 } 115 116 public void setList(List<ListEntity> list) { 117 this.list = list; 118 } 119 120 public String getEnd_time() { 121 return end_time; 122 } 123 124 public String getStart_time() { 125 return start_time; 126 } 127 128 public List<ListEntity> getList() { 129 return list; 130 } 131 132 public static class ListEntity { 133 134 private String cover_price; 135 private String figure; 136 private String name; 137 private String origin_price; 138 private String product_id; 139 140 public void setCover_price(String cover_price) { 141 this.cover_price = cover_price; 142 } 143 144 public void setFigure(String figure) { 145 this.figure = figure; 146 } 147 148 public void setName(String name) { 149 this.name = name; 150 } 151 152 public void setOrigin_price(String origin_price) { 153 this.origin_price = origin_price; 154 } 155 156 public void setProduct_id(String product_id) { 157 this.product_id = product_id; 158 } 159 160 public String getCover_price() { 161 return cover_price; 162 } 163 164 public String getFigure() { 165 return figure; 166 } 167 168 public String getName() { 169 return name; 170 } 171 172 public String getOrigin_price() { 173 return origin_price; 174 } 175 176 public String getProduct_id() { 177 return product_id; 178 } 179 } 180 } 181 182 public static class ActInfoEntity { 183 184 private String icon_url; 185 private String name; 186 private String url; 187 188 public void setIcon_url(String icon_url) { 189 this.icon_url = icon_url; 190 } 191 192 public void setName(String name) { 193 this.name = name; 194 } 195 196 public void setUrl(String url) { 197 this.url = url; 198 } 199 200 public String getIcon_url() { 201 return icon_url; 202 } 203 204 public String getName() { 205 return name; 206 } 207 208 public String getUrl() { 209 return url; 210 } 211 } 212 213 public static class BannerInfoEntity { 214 215 private String image; 216 private int option; 217 private int type; 218 private ValueEntity value; 219 220 public void setImage(String image) { 221 this.image = image; 222 } 223 224 public void setOption(int option) { 225 this.option = option; 226 } 227 228 public void setType(int type) { 229 this.type = type; 230 } 231 232 public void setValue(ValueEntity value) { 233 this.value = value; 234 } 235 236 public String getImage() { 237 return image; 238 } 239 240 public int getOption() { 241 return option; 242 } 243 244 public int getType() { 245 return type; 246 } 247 248 public ValueEntity getValue() { 249 return value; 250 } 251 252 public static class ValueEntity { 253 /** 254 * url : /act20161111?cyc_app=1 255 */ 256 257 private String url; 258 259 public void setUrl(String url) { 260 this.url = url; 261 } 262 263 public String getUrl() { 264 return url; 265 } 266 } 267 } 268 269 public static class ChannelInfoEntity { 270 /** 271 * channel_name : 服飾 272 * image : /app/img/menu-cyc.png 273 * option : 2 274 * type : 1 275 * value : {"channel_id":"8"} 276 */ 277 278 private String channel_name; 279 private String image; 280 private int option; 281 private int type; 282 private ValueEntity value; 283 284 public void setChannel_name(String channel_name) { 285 this.channel_name = channel_name; 286 } 287 288 public void setImage(String image) { 289 this.image = image; 290 } 291 292 public void setOption(int option) { 293 this.option = option; 294 } 295 296 public void setType(int type) { 297 this.type = type; 298 } 299 300 public void setValue(ValueEntity value) { 301 this.value = value; 302 } 303 304 public String getChannel_name() { 305 return channel_name; 306 } 307 308 public String getImage() { 309 return image; 310 } 311 312 public int getOption() { 313 return option; 314 } 315 316 public int getType() { 317 return type; 318 } 319 320 public ValueEntity getValue() { 321 return value; 322 } 323 324 public static class ValueEntity { 325 /** 326 * channel_id : 8 327 */ 328 329 private String channel_id; 330 331 public void setChannel_id(String channel_id) { 332 this.channel_id = channel_id; 333 } 334 335 public String getChannel_id() { 336 return channel_id; 337 } 338 } 339 } 340 341 public static class HotInfoEntity { 342 /** 343 * cover_price : 159.00 344 * figure : /1477984921265.jpg 345 * name : 現貨【一方塵寰】劍俠情緣三劍三七秀 干將莫邪 90橙武仿燒藍復古對簪 346 * product_id : 9356 347 */ 348 349 private String cover_price; 350 private String figure; 351 private String name; 352 private String product_id; 353 354 public void setCover_price(String cover_price) { 355 this.cover_price = cover_price; 356 } 357 358 public void setFigure(String figure) { 359 this.figure = figure; 360 } 361 362 public void setName(String name) { 363 this.name = name; 364 } 365 366 public void setProduct_id(String product_id) { 367 this.product_id = product_id; 368 } 369 370 public String getCover_price() { 371 return cover_price; 372 } 373 374 public String getFigure() { 375 return figure; 376 } 377 378 public String getName() { 379 return name; 380 } 381 382 public String getProduct_id() { 383 return product_id; 384 } 385 } 386 387 public static class RecommendInfoEntity { 388 389 private String cover_price; 390 private String figure; 391 private String name; 392 private String product_id; 393 394 public void setCover_price(String cover_price) { 395 this.cover_price = cover_price; 396 } 397 398 public void setFigure(String figure) { 399 this.figure = figure; 400 } 401 402 public void setName(String name) { 403 this.name = name; 404 } 405 406 public void setProduct_id(String product_id) { 407 this.product_id = product_id; 408 } 409 410 public String getCover_price() { 411 return cover_price; 412 } 413 414 public String getFigure() { 415 return figure; 416 } 417 418 public String getName() { 419 return name; 420 } 421 422 public String getProduct_id() { 423 return product_id; 424 } 425 } 426 } 427 }
這個javabean的屬性不少,和返回的json數據格式裏面的字段是一一對應的,寫起來可能會比較費時,固然咱們有能夠偷懶的辦法,這裏介紹一個插件GsonFormat,這個插件是能夠根據json格式數據去生成對應的javabean的,這個插件的安裝方式和跟安裝butterknife插件是同樣的作法,這裏就再也不細說如何安裝GsonFormat插件了,主要是講講GsonFormat插件的用法,用法以下:
新建一個ResultBeanData類,先不要定義屬性,而後打開GsonFormat插件,而後將json格式數據複製到GsonFormat,點擊OK按鈕就能夠在ResultBeanData類生成對應的屬性了,以下圖所示:
ResultBeanData類中的那一堆屬性就是這樣生成的,簡單方便快捷!
關於OkHttpUtils 請求網絡 + 使用 fastjson解析數據就那麼多!