I Got this error when I'm trying to execute on Android ICS 4.0.4
<p>I got those errors when I tried to execute my application on Android 4.0.4 while it worked fine on GB 2.3.6.</p>

<pre><code>05-31 12:35:00.835: E/log_tag(14451): Error in http connection android.os.NetworkOnMainThreadException
05-31 12:35:00.843: E/log_tag(14451): Error converting result java.lang.NullPointerException
05-31 12:35:00.859: E/AndroidRuntime(14451): FATAL EXCEPTION: main
05-31 12:35:00.859: E/AndroidRuntime(14451): java.lang.NullPointerException
05-31 12:35:00.859: E/AndroidRuntime(14451):    at com.formation.Testexpandable.Login$1.onClick(Login.java:161)
05-31 12:35:00.859: E/AndroidRuntime(14451):    at android.view.View.performClick(View.java:3511)
05-31 12:35:00.859: E/AndroidRuntime(14451):    at android.view.View$PerformClick.run(View.java:14105)
05-31 12:35:00.859: E/AndroidRuntime(14451):    at android.os.Handler.handleCallback(Handler.java:605)
05-31 12:35:00.859: E/AndroidRuntime(14451):    at android.os.Handler.dispatchMessage(Handler.java:92)
05-31 12:35:00.859: E/AndroidRuntime(14451):    at android.os.Looper.loop(Looper.java:137)
05-31 12:35:00.859: E/AndroidRuntime(14451):    at android.app.ActivityThread.main(ActivityThread.java:4575)
05-31 12:35:00.859: E/AndroidRuntime(14451):    at java.lang.reflect.Method.invokeNative(Native Method)
05-31 12:35:00.859: E/AndroidRuntime(14451):    at java.lang.reflect.Method.invoke(Method.java:511)
05-31 12:35:00.859: E/AndroidRuntime(14451):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
05-31 12:35:00.859: E/AndroidRuntime(14451):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
05-31 12:35:00.859: E/AndroidRuntime(14451):    at dalvik.system.NativeStart.main(Native Method)
</code></pre>
