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[英]Android: how to use Code to interface design pattern to have multiple implementations of network call libraries(Retrofit or volley)
[英]Design pattern for retrofit interface
我的Retrofit界面创建器的设计有问题。 我希望能够以通用方式实现API接口,并在传递令牌时更新相应的实例。 目前,当我更新令牌时,我必须再次调用createService()方法来获取在生成接口时使用令牌的新实例...
有人问过类似的问题,但没有得到回答这里
public class RetrofitCreator {
private static String TAG = "RetrofitCreator";
private static String WSSE = null;
private static String AmzToken = null;
static HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
private static AmazonAPI amazonAPI = null;
private static VanishAPI cobaltAPI = null;
//static OkHttpClient client = new OkHttpClient.Builder().build();
static OkHttpClient.Builder httpClient = new OkHttpClient.Builder().addInterceptor(interceptor.setLevel(HttpLoggingInterceptor.Level.BODY));
private static Retrofit.Builder builder =
new Retrofit.Builder();
public static <S> S createService(Class<S> serviceClass) {
S mAPI = null;
if(serviceClass.getSimpleName().equals("VanishAPI")){
if(VanishAPI==null){
VanishAPI = (VanishAPI) createVanishAPI(serviceClass);
}
mAPI = (S) VanishAPI;
}else if(serviceClass.getSimpleName().equals("AmazonAPI")){
if(amazonAPI==null){
amazonAPI = (AmazonAPI) createAmazonAPI(serviceClass);
}
mAPI = (S) amazonAPI;
}
return mAPI;
}
public static void setWSSE(String WSSE) {
RetrofitCreator.WSSE = WSSE;
vanishAPI = createVanishAPI(VanishAPI.class);
}
public static void setAmzToken(String token) {
RetrofitCreator.AmzToken = token;
amazonAPI = createAmazonAPI(AmazonAPI.class);
}
private static <S> S createAmazonAPI(Class<S> serviceClass){
httpClient = getUnsafeOkHttpClient();
builder = new Retrofit.Builder()
.baseUrl(Constants.URL_AMAZON)
.addConverterFactory(JacksonConverterFactory.create());
if (AmzToken != null) {
Log.w(TAG, "WSSE not null!");
Interceptor interceptorSecure = new Interceptor() {
@Override
public Response intercept(Interceptor.Chain chain) throws IOException {
Request original = chain.request();
// Request customization: add request headers
Request.Builder requestBuilder = original.newBuilder()
.header("Cache-Control", "no-cache")
.header("Accept", "application/json")
.header("Authorization", "Bearer " + AmzToken)
.method(original.method(), original.body());
Request request = requestBuilder.build();
return chain.proceed(request);
}
};
httpClient.addInterceptor(interceptorSecure);
}
OkHttpClient client = httpClient.build();
Retrofit retrofit = builder.client(client).build();
return retrofit.create(serviceClass);
}
(...)
}
要在我使用的每个Activity中获取它:
amazonApi = RetrofitCreator.createService(AmazonAPI.class);
使你的拦截器看起来像这样:
public class TokenInterceptor implements Interceptor {
private String token;
public String getToken() {
return token;
}
@Override
public Response intercept(Chain chain) throws IOException {
Request original = chain.request();
// Request customization: add request headers
Request.Builder requestBuilder = original.newBuilder()
.header("Cache-Control", "no-cache")
.header("Accept", "application/json")
.method(original.method(), original.body());
if (getToken() != null) {
requestBuilder.header("Authorization", "Bearer " + AmzToken);
}
Request request = requestBuilder.build();
return chain.proceed(request);
}
public void setToken(String token) {
this.token = token;
}
}
将它添加到OkHttp客户端并保持对此拦截器的引用。 现在,您不必在每次更改令牌后调用createService()
。 只需通过interceptor.setToken()
更改拦截interceptor.setToken()
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