Added workaround for okhttp issue square/okhttp#3146

Author: ajungg

CHANGELOG.md

@@ -1,6 +1,13 @@
 # Changelog  
 All notable changes to this project will be documented in this file.
 
+## [0.12.4]
+
+### Fixed
+- Fixed an issue that prevented repeated network calls would reuse dead connection
+pools and result in network errors even when network was available again
+- Subtitle visibility for recycled shopping cart cells
+
 ## [0.12.3]
 
 ### Fixed

build.gradle

@@ -23,7 +23,7 @@ allprojects {
     }
 
     project.ext {
-        sdkVersion='0.12.3'
+        sdkVersion='0.12.4'
         versionCode=1
 
         compileSdkVersion=28

core/src/main/java/io/snabble/sdk/OkHttpClientFactory.java

@@ -1,7 +1,7 @@
 package io.snabble.sdk;
 
 import android.app.Application;
-import io.snabble.sdk.auth.SnabbleAuthorizationInterceptor;
+import java.util.concurrent.TimeUnit;
 import io.snabble.sdk.utils.Logger;
 import okhttp3.Cache;
 import okhttp3.CertificatePinner;
@@ -27,8 +27,8 @@ static OkHttpClient createOkHttpClient(Application application) {
         OkHttpClient.Builder builder = new OkHttpClient.Builder();
 
         builder.cache(new Cache(application.getCacheDir(), 10485760)); //10 MB
-
         builder.retryOnConnectionFailure(true);
+        builder.pingInterval(5, TimeUnit.SECONDS); // workaround for https://github.com/square/okhttp/issues/3146
 
         HttpLoggingInterceptor logging = new HttpLoggingInterceptor(
                 new HttpLoggingInterceptor.Logger() {