Develop Reference

Json is not loaded from a HTTPS address (SSL) in lower versions of Android (<4.4)

Android lower version devices (4.*) gives SSL error. Works perfectly on high versions of Android
I use a class that processes JSON requests, But in Android 4.4, no information about Json is loaded
public static ApiInterface createAPI() {
OkHttpClient.Builder builder = new OkHttpClient.Builder();
builder.connectTimeout(30, TimeUnit.SECONDS);
builder.writeTimeout(30, TimeUnit.SECONDS);
builder.readTimeout(30, TimeUnit.SECONDS);
builder.cache(null);
OkHttpClient okHttpClient = builder.build();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(Constant.'https://example.com/alljson')
.addCallAdapterFactory(RxJava2CallAdapterFactory.create())
.addConverterFactory(GsonConverterFactory.create())
.client(okHttpClient)
.build();
return retrofit.create(ApiInterface.class);
}
}
Please simply explain what I should do to make Jason load from HTTPS Addresses on all devices
Thanks all

How to use Okhttpclient Create a Http Delete Or Put Method With Params? android okhttpclient

Does anyone know in Android How to use Okhttpclient Create a Http Delete Or Put Method With Params?
Using java , this is what i have tried:
CookieJarImpl cookieJar = new CookieJarImpl(new PersistentCookieStore(context));
okHttpClient = new OkHttpClient.Builder()
.cookieJar(cookieJar)
.addInterceptor(new LoggerInterceptor("TAG"))
.connectTimeout(10000L, TimeUnit.MILLISECONDS)
.readTimeout(10000L, TimeUnit.MILLISECONDS) //其他配置
.build();

You can build a URL with query parameters using the HttpUrl class. Then you can use an okhttp3.Request.Buidler() along with either the post() or delete() methods:
HttpUrl url = new HttpUrl.Builder()
.host(host).addQueryParameter(name, value).build();
Request request = new Request.Builder()
.url(url).post(RequestBody.create(mediaType, body)).addHeader(type, header).build();
okhttpClient.newCall(request).enqueue(new Callback() {
...
});
You can check out the OkHttp wiki for recipes if you need further help. Or you could use Square's other wonderful library, Retrofit, which pairs well with OkHttp.

How to add Basic Authentication in Picasso 2.5.2 with OkHttp 3.2.0

I am using picasso 2.5.2 library to download bitmap from remote server, the image url requires basic authentication in header.
i have tried the following SO ansers but none of them work with the latest picasso and OkHttp libraries.
Answer - 1
Answer - 2
Answer - 3
Thanks in advance.

Try configuring an OkHttp3 client with authenticator, depending on your scheme and situation:
OkHttpClient okHttpClient = new OkHttpClient.Builder()
.authenticator(new Authenticator()
{
#Override
public Request authenticate(Route route, Response response) throws IOException
{
String credential = Credentials.basic("user", "pass");
return response.request().newBuilder()
.header("Authorization", credential)
.build();
}
})
.build();
Then, use that client in forming your Picasso object, but with okhttp3 you will have to use a OkHttp3Downloader instead, like so:
Picasso picasso = new Picasso.Builder(context)
.downloader(new OkHttp3Downloader(okHttpClient))
.build();
You can get the OkHttp3Downloader from https://github.com/JakeWharton/picasso2-okhttp3-downloader

Bypass okHttp Cache to get a network response and then update the cache

I am caching the HTTP response Using Retrofit2 and OKHttp.
Here is my code:
int cacheSize = 10 * 1024 * 1024;
Cache cache = new Cache(application.getCacheDir(), cacheSize);
HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient client = new OkHttpClient.Builder().
cache(cache).addNetworkInterceptor(interceptor).build();
Retrofit retrofit = new Retrofit.Builder()
.addConverterFactory(GsonConverterFactory.create(gson))
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())
.baseUrl(mBaseUrl)
.client(okHttpClient)
.build();
I am getting the response headers Cache-control and Expires from our backend REST API's.
Now i want to get the server Response by bypassing the the Expires Header.
Please help me with this problem.

Add this header to your HTTP request:
Cache-Control: no-cache
You can do this with Retrofit’s #Header or with an OkHttp interceptor.

Execute http request in parallel with Retrofit 2

I want to implement multiple parallel request in Retrofit 2.
I have the following structure to make 3 request :
HistoricalRApi.IStockChart service=HistoricalRApi.getMyApiService();
//^BVSP,^DJI,^IXIC
Call<HistoricalDataResponseTimestamp> call1= service.get1DHistoricalDataByStock("^IXIC");
Call<HistoricalDataResponseTimestamp> call2= service.get1DHistoricalDataByStock("^DJI");
Call<HistoricalDataResponseTimestamp> call3= service.get1DHistoricalDataByStock("^GSPC");
call1.enqueue(retrofitCallbackAmerica());
call2.enqueue(retrofitCallbackAmerica());
call3.enqueue(retrofitCallbackAmerica());
}
I have read that in Retrofit1, when defining the rest adapter one can define parallel request with .setExecutor like here:
RestAdapter adapter = new RestAdapter.Builder()
.setEndpoint(END_POINT)
.setLogLevel(RestAdapter.LogLevel.FULL)
.setExecutors(Executors.newFixedThreadPool(3), null)
.build();
My question is how can i achieve the same in Retrofit 2? Thanks in advance

Thanks to Colin Gillespie link i have implemented what Jake Wharton says and this is the result:
public static IStockChart getMyApiService() {
OkHttpClient client=new OkHttpClient();
Dispatcher dispatcher=new Dispatcher();
dispatcher.setMaxRequests(3);
client.setDispatcher(dispatcher);
// OkHttpClient client = new OkHttpClient();
// HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
// interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
// client.interceptors().add(interceptor);
if(myService ==null){
Retrofit retrofit=new Retrofit.Builder()
.baseUrl("http://chartapi.finance.yahoo.com/")
.addConverterFactory(JsonpGsonConverterFactory.create())
.client(client)
.build();
myService=retrofit.create(IStockChart.class);
return myService;
} else {
return myService;
}
}