android 拦截器

public class MyApp extends Application{    private static OkHttpClient okHttpClient;    @Override    public void onCreate() {        super.onCreate();        ImageLoaderConfiguration imageLoaderConfiguration=new ImageLoaderConfiguration.Builder(this).build();        ImageLoader.getInstance().init(imageLoaderConfiguration);        okHttpClient = new OkHttpClient.Builder()                .readTimeout(15, TimeUnit.SECONDS)                .writeTimeout(15, TimeUnit.SECONDS)                .connectTimeout(15, TimeUnit.SECONDS)                .addInterceptor(new MyInterceptor())                .build();    }    public static OkHttpClient getOkHttpClient(){        return okHttpClient;    }    class MyInterceptor implements Interceptor {        @Override        public Response intercept(Chain chain) throws IOException {            Request request = chain.request();            if("POST".equalsIgnoreCase(request.method())){                //拿到旧的formbody                RequestBody oldbody = request.body();                if(oldbody instanceof FormBody){                    //构造一个新的FormBody                    FormBody.Builder builder=new FormBody.Builder();                    //新的FormBody去添加参数                     builder.add("source","android");                    FormBody old= (FormBody) oldbody;                    for (int i=0;i;i++){                        builder.add(old.encodedName(i),old.encodedValue(i));                    }                    FormBody newbody=builder.build();                    request=request.newBuilder()                            .url(request.url())                            .post(newbody)                            .build();                }            }            Response response=chain.proceed(request);            return response;        }    }}
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