本項目來自菜鳥窩阿蝶，有興趣者點擊http://www.cniao5.com/course/
項目已經做完，源碼地址蔫巩。https://github.com/15829238397/CN5E-shop
仿京東商城系列0------項目簡介
仿京東商城系列1------fragmentTabHost實現(xiàn)底部導航欄
仿京東商城系列2------自定義toolbar
仿京東商城系列3------封裝Okhttp
仿京東商城系列4------輪播廣告條
仿京東商城系列5------商品推薦欄
仿京東商城系列6------下拉刷新上拉加載的商品列表
仿京東商城系列7------商品分類頁面
仿京東商城系列8------自定義的數量控制器
仿京東商城系列9------購物車數據存儲器實現(xiàn)
仿京東商城系列10------添加購物車，管理購物車功能實現(xiàn)
仿京東商城系列11------商品排序功能以及布局切換實現(xiàn)（Tablayout）
仿京東商城系列12------商品詳細信息展示（nativie與html交互）
仿京東商城系列13------商品分享（shareSDK）
仿京東商城系列14------用戶登錄以及app登錄攔截
仿京東長城系列15------用戶注冊，SMSSDK集成
仿京東商城系列16------支付SDK集成
仿京東商城系列17------支付功能實現(xiàn)
仿京東商城系列18------xml文件讀茸匪（地址選擇器）
仿京東商城系列19------九宮格訂單展示
仿京東商城系列20------終章
前言
本文講述Okhttp的封裝過程，便于使用绽榛，不對源碼部分進行深究湿酸。
推薦一篇文章
okhttp源碼學習筆記（一）-- 綜述
內容
基本使用
- 設置網絡權限
在manifests文件中增加權限
<uses-permission android:name="android.permission.INTERNET"/>
- 添加依賴
compile 'com.squareup.okhttp:okhttp-urlconnection:2.7.5'
compile 'com.squareup.okhttp:okhttp:2.7.5'
- get請求
OkHttpClient client = new OkHttpClient() ;
client.setConnectTimeout(5 , TimeUnit.SECONDS);
client.setWriteTimeout(5 , TimeUnit.SECONDS);
client.setReadTimeout(5 , TimeUnit.SECONDS);
String url = "http://www.reibang.com/p/6ffde18fb034" ;
Request request = new Request.Builder().url(url).get().build() ;
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Request request, IOException e) {
}
@Override
public void onResponse(Response response) throws IOException {
}
});
}
- post請求
OkHttpClient client = new OkHttpClient() ;
client.setConnectTimeout(5 , TimeUnit.SECONDS);
client.setWriteTimeout(5 , TimeUnit.SECONDS);
client.setReadTimeout(5 , TimeUnit.SECONDS);
String url = "http://www.reibang.com/p/6ffde18fb034" ;
//盛放參數
RequestBody requestBody = new FormEncodingBuilder()
.add("name","xxx").build() ;
Request request = new Request.Builder().url(url).post(requestBody).build() ;
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Request request, IOException e) {
}
@Override
public void onResponse(Response response) throws IOException {
}
});
}
okhttp封裝
由上面的簡單使用，我們可以知道Okhttp的使用有幾個重要的部分：
- client
- Requset
- Callback
我們將從這三方面對Okhttp進行封裝灭美。
先上代碼：
package com.example.cne_shop.okhttp;
import android.app.Service;
import android.os.Handler;
import android.text.TextUtils;
import android.util.Log;
import com.example.cne_shop.myException.GET_RESPONSE_MESSAGE_FAILURE;
import com.example.cne_shop.myException.GSON_ANALYZE_MESSAGE_FAILURE;
import com.google.gson.Gson;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.FormEncodingBuilder;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.RequestBody;
import com.squareup.okhttp.Response;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
/**
* Created by 博 on 2017/8/22.
*/
public class OkhttpHelper {
//所有的請求公用一個OkhttpClient
private static OkHttpClient client ;
private Handler handler ;
private Gson gson ;
private static final int TOKEN_ERROR = 401 ;
private static final int TOKEN_EXPRISE = 402 ;
private static final int TOKEN_MISSING = 403 ;
private OkhttpHelper(){
//初始化client信息
client = new OkHttpClient() ;
client.setConnectTimeout(5 , TimeUnit.SECONDS);
client.setWriteTimeout(5 , TimeUnit.SECONDS);
client.setReadTimeout(5 , TimeUnit.SECONDS);
gson = new Gson() ;
}
//提供一個靜態(tài)方法供外部請求推溃。
public static OkhttpHelper getOkhttpHelper(){
return new OkhttpHelper() ;
}
//提交get請求的方法。
public void doGet (String uri , BaseCallback callback){
doGet(uri , callback , null);
}
//帶參數請求的方法
public void doGet (String uri , BaseCallback callback , Map<String , String> formData){
Request request = buildRequest(uri , METHOD_TYPE.GET , formData);
doRequest(request , callback);
}
public void doPost(String uri , BaseCallback callback , Map<String , String> formData){
Request request = buildRequest(uri , METHOD_TYPE.POST , formData);
doRequest(request , callback);
}
private void doRequest(final Request request , final BaseCallback callback){
callback.onRequestBefore();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Request request, IOException e) {
//提交失敗
callbackFailure(callback , request ,e);
}
@Override
public void onResponse(Response response) throws IOException {
if (response.isSuccessful()){
String jqury = response.body().string() ;
if (callback.type == String.class){
callback.callBackSucces(response , jqury);
}else {
try{
Object object = gson.fromJson(jqury , callback.type) ;
callbackSuccess(callback , response , jqury);
}catch (Exception e){
callbackError(callback , response , null);
throw new GSON_ANALYZE_MESSAGE_FAILURE("gson解析信息失敗") ;
}
}
}else{
callbackError(callback , response , null);
}
}
});
}
private Request buildRequest (String uri , METHOD_TYPE method_type , Map<String , String> formData){
Request.Builder builder = new Request.Builder() ;
if(method_type == METHOD_TYPE.GET){
uri = getUriWithParams(uri , formData) ;
builder.url(uri) ;
builder.get() ;
}else if (method_type == METHOD_TYPE.POST){
builder.url(uri) ;
RequestBody requestBody = buildFormData(formData) ;
builder.post(requestBody) ;
}
return builder.build() ;
}
private RequestBody buildFormData (Map<String , String> formData){
if(formData != null) {
FormEncodingBuilder formEncodingBuilder = new FormEncodingBuilder() ;
for (Map.Entry<String , String> objectMap : formData.entrySet()){
formEncodingBuilder.add( objectMap.getKey() , objectMap.getValue() ) ;
}
return formEncodingBuilder.build() ;
}
return null ;
}
//對參數進行處理
private String getUriWithParams(String uri , Map<String , String > formData){
String symbol = null ;
int signNum = 0 ;
if(formData == null){
return uri ;
}
for(String key : formData.keySet()){
symbol = (signNum++ == 0 )? "?" : "&" ;
uri = uri+symbol+key+"="+formData.get(key) ;
}
return uri ;
}
/**
* 以下方法保證對于okhttp的攔截處理運行在主線程
*
*/
private void callbackTokenError (final BaseCallback baseCallback , final Response response){
handler.post(new Runnable() {
@Override
public void run() {
baseCallback.onTokenError(response , response.code());
}
});
}
private void callbackSuccess (final BaseCallback baseCallback , final Response response , final Object object){
handler.post(new Runnable() {
@Override
public void run() {
try {
baseCallback.callBackSucces(response , object);
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
private void callbackError (final BaseCallback baseCallback , final Response response , final Object object){
handler.post(new Runnable() {
@Override
public void run() {
try {
baseCallback.onErroe(response , response.code() , new GET_RESPONSE_MESSAGE_FAILURE("獲取服務器信息失敗"));
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
private void callbackFailure (final BaseCallback baseCallback , final Request request , final IOException e){
handler.post(new Runnable() {
@Override
public void run() {
baseCallback.onFailure(request , e);
}
});
}
enum METHOD_TYPE {
GET,
POST
}
private void demo(){
OkHttpClient client = new OkHttpClient() ;
client.setConnectTimeout(5 , TimeUnit.SECONDS);
client.setWriteTimeout(5 , TimeUnit.SECONDS);
client.setReadTimeout(5 , TimeUnit.SECONDS);
String url = "http://www.reibang.com/p/6ffde18fb034" ;
//盛放參數
RequestBody requestBody = new FormEncodingBuilder()
.add("name","xxx").build() ;
Request request = new Request.Builder().url(url).post(requestBody).build() ;
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Request request, IOException e) {
}
@Override
public void onResponse(Response response) throws IOException {
}
});
}
}
其中BaseCallBack類代碼如下：
package com.example.cne_shop.okhttp;
import com.google.gson.internal.$Gson$Types;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;
import java.io.IOException;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
/**
* Created by 博 on 2017/8/22.
*/
public abstract class BaseCallback<T> {
public Type type ;
static Type getSuperclassTypeParameter(Class<?> subclass ){
Type superClass = subclass.getGenericSuperclass() ;
if (superClass instanceof Class){
throw new RuntimeException("Missing type parameter") ;
}
ParameterizedType parameterizedType = (ParameterizedType) superClass;
return $Gson$Types.canonicalize(parameterizedType.getActualTypeArguments()[0]) ;
}
public BaseCallback(){
this.type = getSuperclassTypeParameter(this.getClass()) ;
}
public abstract void onRequestBefore();
public abstract void onFailure(Request request, IOException e) ;
public abstract void onErroe(Response response , int responseCode , Exception e) throws IOException ;
public abstract void callBackSucces(Response response , T t) throws IOException ;
public abstract void onTokenError(Response response , int responseCode );
}
有關于getSuperclassTypeParameter()靜態(tài)方法届腐，作用為取得類泛型的類型铁坎。也就是得到T的真實類型。
詳細解釋戳http://blog.csdn.net/hello__zero/article/details/44201033其中犁苏，我們定義了一個OkhttpClient對象硬萍，并設置偽靜態(tài)，使得所有請求都使用這一個對象围详。
利用枚舉類型參數朴乖，將post與get請求的request構建分別進行操作。得到request類型對象
自定義basecallback抽象類助赞，插入Callback的實現(xiàn)方法中中進行實現(xiàn)买羞，使得使用者能在使用時再實現(xiàn)相關的方法，且方法的執(zhí)行被放在主線程雹食。
使用
- 使用時只需要通過OkhttpHelper.getOkhttpHelper(),方法獲得OkhttpHelper對象畜普。
- 使用OkhttpHelper對象調用doget，或dopost方法進行操作群叶。
