bonjour , j essaie de me connecter a serveur distant avec des requtes https via un certficat auto signé . mais je reçois une erreur dont j arrive pas à connaitre la source si quelqu'un en a deja rencontré merci

voici les trace


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06-20 11:28:27.258: WARN/ActivityManager(58): Launch timeout has expired, giving up wake lock!
06-20 11:28:27.607: WARN/ActivityManager(58): Activity idle timeout for HistoryRecord{4507de98 com.connexion/.Connexion}
06-20 11:35:58.661: WARN/ActivityManager(58): Launch timeout has expired, giving up wake lock!
06-20 11:35:59.489: WARN/ActivityManager(58): Activity idle timeout for HistoryRecord{4507a1f0 com.connexion/.Connexion}
06-20 11:36:27.491: WARN/System.err(739): java.net.SocketTimeoutException: SSL handshake timed out
06-20 11:36:27.500: WARN/System.err(739):     at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.nativeconnect(Native Method)
06-20 11:36:27.500: WARN/System.err(739):     at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.startHandshake(OpenSSLSocketImpl.java:316)
06-20 11:36:27.526: WARN/System.err(739):     at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl$SSLInputStream.<init>(OpenSSLSocketImpl.java:520)
06-20 11:36:27.526: WARN/System.err(739):     at org.apache.harmony.xnet.provider.jsse.OpenSSLSocketImpl.getInputStream(OpenSSLSocketImpl.java:461)
06-20 11:36:27.531: WARN/System.err(739):     at org.apache.http.impl.io.SocketInputBuffer.<init>(SocketInputBuffer.java:93)
06-20 11:36:27.531: WARN/System.err(739):     at org.apache.http.impl.SocketHttpClientConnection.createSessionInputBuffer(SocketHttpClientConnection.java:83)
06-20 11:36:27.531: WARN/System.err(739):     at org.apache.http.impl.conn.DefaultClientConnection.createSessionInputBuffer(DefaultClientConnection.java:170)
06-20 11:36:27.531: WARN/System.err(739):     at org.apache.http.impl.SocketHttpClientConnection.bind(SocketHttpClientConnection.java:106)
06-20 11:36:27.531: WARN/System.err(739):     at org.apache.http.impl.conn.DefaultClientConnection.openCompleted(DefaultClientConnection.java:129)
06-20 11:36:27.531: WARN/System.err(739):     at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:171)
06-20 11:36:27.551: WARN/System.err(739):     at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
06-20 11:36:27.551: WARN/System.err(739):     at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
06-20 11:36:27.551: WARN/System.err(739):     at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:348)
06-20 11:36:27.551: WARN/System.err(739):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
06-20 11:36:27.551: WARN/System.err(739):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
06-20 11:36:27.551: WARN/System.err(739):     at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
06-20 11:36:27.551: WARN/System.err(739):     at com.connexion.Connexion.onCreate(Connexion.java:101)
06-20 11:36:27.551: WARN/System.err(739):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
06-20 11:36:27.551: WARN/System.err(739):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
06-20 11:36:27.551: WARN/System.err(739):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
06-20 11:36:27.551: WARN/System.err(739):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
06-20 11:36:27.551: WARN/System.err(739):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
06-20 11:36:27.551: WARN/System.err(739):     at android.os.Handler.dispatchMessage(Handler.java:99)
06-20 11:36:27.570: WARN/System.err(739):     at android.os.Looper.loop(Looper.java:123)
06-20 11:36:27.570: WARN/System.err(739):     at android.app.ActivityThread.main(ActivityThread.java:4627)
06-20 11:36:27.570: WARN/System.err(739):     at java.lang.reflect.Method.invokeNative(Native Method)
06-20 11:36:27.570: WARN/System.err(739):     at java.lang.reflect.Method.invoke(Method.java:521)
06-20 11:36:27.570: WARN/System.err(739):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
06-20 11:36:27.570: WARN/System.err(739):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
06-20 11:36:27.570: WARN/System.err(739):     at dalvik.system.NativeStart.main(Native Method)
06-20 11:36:27.640: WARN/dalvikvm(739): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
06-20 11:36:27.662: ERROR/AndroidRuntime(739): FATAL EXCEPTION: main
06-20 11:36:27.662: ERROR/AndroidRuntime(739): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.connexion/com.connexion.Connexion}: java.lang.NullPointerException
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at android.os.Handler.dispatchMessage(Handler.java:99)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at android.os.Looper.loop(Looper.java:123)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at android.app.ActivityThread.main(ActivityThread.java:4627)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at java.lang.reflect.Method.invokeNative(Native Method)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at java.lang.reflect.Method.invoke(Method.java:521)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at dalvik.system.NativeStart.main(Native Method)
06-20 11:36:27.662: ERROR/AndroidRuntime(739): Caused by: java.lang.NullPointerException
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at com.connexion.Connexion.onCreate(Connexion.java:109)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
06-20 11:36:27.662: ERROR/AndroidRuntime(739):     ... 11 more
06-20 11:36:27.680: WARN/ActivityManager(58):   Force finishing activity com.connexion/.Connexion
06-20 11:36:28.397: WARN/ActivityManager(58): Activity pause timeout for HistoryRecord{4507a1f0 com.connexion/.Connexion}
06-20 11:36:38.987: WARN/ActivityManager(58): Activity destroy timeout for HistoryRecord{4507a1f0 com.connexion/.Connexion}
merci d avance