Verweisende Links:

http://developer.android.com/training/articles/security-ssl.html#UnknownCa http://randomizedsort.blogspot.com/2010/09/step-to-step-guide-to-programming.html

Ich habe den folgenden Code für die Verbindung zum Server mit selbstsigniertem Zertifikat (ich verwende diesenAntworten für den Keystore-Teil):

 try
 {
   final KeyStore ks = KeyStore.getInstance("BKS");
   final InputStream inputStream = getApplicationContext().getResources().openRawResource(R.raw.certs);
   ks.load(inputStream, getApplicationContext().getString(R.string.store_pass).toCharArray());
   inputStream.close();

   TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
   tmf.init(ks);

   SSLContext context = SSLContext.getInstance("TLS");
   context.init(null, tmf.getTrustManagers(), new SecureRandom());

   URL url = new URL("https://www.mywebsite.com/");
   HttpsURLConnection urlConnection = (HttpsURLConnection)url.openConnection();
   urlConnection.setSSLSocketFactory(context.getSocketFactory());
   InputStream in = urlConnection.getInputStream();
 }
 catch(Exception e) {
   Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_LONG).show();
   // the toast appear empty (described in question)
 }

Wenn ich den Namen meiner Website benutze als:

 http://www.mywebsite.com 

dann wird in meiner Umgebung try catch eine Ausnahme ausgelöst:

 com.android.okhttp.internal.http.HttpURLConnectionImpl 
 cannot be cast to javax.net.ssl.HttpsURLConnection

Wenn ich benutze:

 https://www.mywebsite.com

dann bekomme ich noch eine ausnahme, aber aus irgendeinem grund das ausnahmeobjekt 'e' incatch(Exception e) hat leere Nachricht (es ist nicht null), also kann ich die Ausnahme nicht herausfinden.

Wenn ich versuche zu benutzen:

 Log.d("TEST", e.getMessage());

dann bekomme ich:

 java.lang.NullPointerException: println needs a message

Kann jemand darauf hinweisen, was ich falsch mache?

Bearbeiten:

Hier ist die Ausgabe von e.printStackTrace ()

D/TEST﹕ e.printStackTrace() :
06-18 14:20:17.493      W/System.err﹕ android.os.NetworkOnMainThreadException
06-18 14:20:17.493      W/System.err﹕ at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1145)
06-18 14:20:17.493      W/System.err﹕ at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
06-18 14:20:17.493      W/System.err﹕ at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
06-18 14:20:17.493      W/System.err﹕ at java.net.InetAddress.getAllByName(InetAddress.java:214)
06-18 14:20:17.493      W/System.err﹕ at com.android.okhttp.internal.Dns$1.getAllByName(Dns.java:28)
06-18 14:20:17.493      W/System.err﹕ at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:216)
06-18 14:20:17.493      W/System.err﹕ at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:122)
06-18 14:20:17.493      W/System.err﹕ at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:292)
06-18 14:20:17.493      W/System.err﹕ at com.android.okhttp.internal.http.HttpEngine.sendSocketRequest(HttpEngine.java:255)
06-18 14:20:17.493      W/System.err﹕ at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:206)
06-18 14:20:17.493      W/System.err﹕ at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:345)
06-18 14:20:17.493      W/System.err﹕ at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:296)
06-18 14:20:17.493      W/System.err﹕ at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:179)
06-18 14:20:17.493      W/System.err﹕ at com.android.okhttp.internal.http.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:246)
06-18 14:20:17.493      W/System.err﹕ at com.android.authmobile.app.TestActivity$1.onClick(TestActivity.java:90)
06-18 14:20:17.493      W/System.err﹕ at android.view.View.performClick(View.java:4438)
06-18 14:20:17.497      W/System.err﹕ at android.view.View$PerformClick.run(View.java:18422)
06-18 14:20:17.497      W/System.err﹕ at android.os.Handler.handleCallback(Handler.java:733)
06-18 14:20:17.497      W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:95)
06-18 14:20:17.497      W/System.err﹕ at android.os.Looper.loop(Looper.java:136)
06-18 14:20:17.497      W/System.err﹕ at android.app.ActivityThread.main(ActivityThread.java:5017)
06-18 14:20:17.497      W/System.err﹕ at java.lang.reflect.Method.invokeNative(Native Method)
06-18 14:20:17.497      W/System.err﹕ at java.lang.reflect.Method.invoke(Method.java:515)
06-18 14:20:17.497      W/System.err﹕ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
06-18 14:20:17.497      W/System.err﹕ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
06-18 14:20:17.497      W/System.err﹕ at dalvik.system.NativeStart.main(Native Method)