title: What is different between "normal" and "dangerous" in android protection level
body: <p>As I read from developer guild in google website
  <a href="http://developer.android.com/guide/topics/manifest/permission-element.html" rel="noreferrer">http://developer.android.com/guide/topics/manifest/permission-element.html</a></p>
  
  <blockquote>
    <p><strong>"normal"</strong>
    The default value. A lower-risk permission that gives
    requesting applications access to isolated application-level features,
    with minimal risk to other applications, the system, or the user. The
    system automatically grants this type of permission to a requesting
    application at installation, without asking for the user's explicit
    approval (though the user always has the option to review these
    permissions before installing).</p>
    
    <p><strong>"dangerous"</strong> 
    A higher-risk permission that would give a requesting
    application access to private user data or control over the device
    that can negatively impact the user. Because this type of permission
    introduces potential risk, the system may not automatically grant it
    to the requesting application. <strong>For example, any dangerous permissions
    requested by an application may be displayed to the user and require
    confirmation before proceeding</strong>, or some other approach may be taken to
    avoid the user automatically allowing the use of such facilities.</p>
  </blockquote>
  
  <p>I know what's the meaning for their definition. The difference between them is for "dangerous" level, system may prompt user to approve dangerous permission. </p>
  
  <p>But I want to know, for "dangerous" level, does it really prompt user that any dangerous permissions requested by an application? What I can see is only permission request before installation. Does any example that can prove it?</p>
  
  <p>Thanks</p>