Implement a workable solution for issue jonan#345

Also tackle legacy device support, downgrade minSdkVersion to 18 from 19
unless someone can tell me that there is a reason the code base must be
on API 19.  Note: I've been working at this to be able to continue to
maintain at least one Github client working with BB10 (Blackberry OS10),
which has ForkHub as its sole Github client in the app store
BlackberryWorld (also in Amazon store), however this app stopped working
about a year or so back, and this should provide a fix.  Work with
upstream maintainers to sort out cleanest fix as this only takes into
account a build specific to the legacy devices.

app/build.gradle

@@ -11,7 +11,7 @@ android {
 
     defaultConfig {
         applicationId 'jp.forkhub'
-        minSdkVersion 19
+        minSdkVersion 18
         targetSdkVersion 27
         versionCode 1020900
         versionName '1.2.9'
@@ -55,4 +55,5 @@ dependencies {
 
     //Self compiled .aar version of wishlist
     compile(name: 'lib', ext: 'aar')
+    implementation 'com.android.support:appcompat-v7:27.1.0'
 }

app/src/main/java/com/github/mobile/DefaultClient.java

@@ -20,6 +20,13 @@
 import java.io.IOException;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.X509TrustManager;
 
 import okhttp3.OkHttpClient;
 import okhttp3.OkUrlFactory;
@@ -50,8 +57,34 @@ public DefaultClient() {
      */
     @Override
     protected HttpURLConnection createConnection(String uri) throws IOException {
-        OkUrlFactory factory = new OkUrlFactory(new OkHttpClient());
-        URL url = new URL(createUri(uri));
-        return factory.open(url);
+        // OkUrlFactory factory = new OkUrlFactory(new OkHttpClient());
+        //
+        // TODO: Look through code base to explore how project handles exceptions
+        // generally, and what to do about the fact this connection has several
+        // new ways it can throw an exception, instead of burrying the fault of KeyManagementException or
+        // NoSuchAlgorithmException
+        try {
+                // NOTE: The deprecated signature below for sslSocketFactory() 
+                // final OkHttpClient client = new OkHttpClient.Builder().sslSocketFactory(new TLSSocketFactory()).build();
+
+                // public OkHttpClient.Builder sslSocketFactory(SSLSocketFactory sslSocketFactory,
+                //                                             X509TrustManager trustManager)
+                TrustManager[] trustManagers = new TrustManager[] { new TrustManagerManipulator() };
+
+                SSLContext context = SSLContext.getInstance("TLS");
+                context.init(null, trustManagers, new SecureRandom());
+                final OkHttpClient client2 = new OkHttpClient.Builder().sslSocketFactory(new TLSSocketFactory(context.getSocketFactory()), (X509TrustManager) trustManagers[0]).build();
+                URL url = new URL(createUri(uri));
+                OkUrlFactory factory = new OkUrlFactory(client2);
+                return factory.open(url);
+            } catch (KeyManagementException e) {
+                e.printStackTrace();
+                throw new IOException(e.getMessage());
+            } catch (NoSuchAlgorithmException e) {
+                e.printStackTrace();
+                throw new IOException(e.getMessage());
+            }
+        // URL url = new URL(createUri(uri));
+        // return factory.open(url);
     }
 }