Android application stops unexpectedly
<p>In the emulator, it shows me the infomation: The application my_app_name (process pack_name) has stoped unexpectedly.Pls try again
What is the problem?</p>

<p>Because i just add many field in the layout.xml file?</p>

<p>I am a newbie in Android development. Thanks you for your help</p>
