startActivity with an implicit category-less intent
<p>It seems to me that if startActivity is called with an implicit categoryless intent, only activities with an intent filter specifying the default category (android.intent.category.DEFAULT) can be launched. </p>

<p>The category is not needed in the intent filter for services if we use startService instead of startActivity.</p>

<p>Does everybody see the same behavior ?</p>

<p>Is it documented somewhere in the Android official documentation ?</p>
