title: Android activity OnCreate is called twice
body: <p>I start my second activity like this : </p>
  
  <pre><code>Intent intentNotAuthorized = new Intent(SplashScreen.this, NotAthorized.class);
              intentNotAuthorized.putExtra("message","dummy");
              intentNotAuthorized.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
              startActivity(intentNotAuthorized);
              finish();
  </code></pre>
  
  <p>When go back back to the first activity using :</p>
  
  <pre><code>      Intent intentSplash = new Intent(NotAthorized.this, SplashScreen.class);
          intentSplash.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
          startActivity(intentSplash);
          finish();
  </code></pre>
  
  <p>when the first activity is created Oncreate was called twise</p>