title: What is the use of -n while starting activity using adb shell am start command
body: <p>We can able to launch activity using the following adb shell command.</p>
  
  <pre><code>adb shell am start -n &lt;PackageName&gt;/&lt;ActivityName&gt;
  </code></pre>
  
  <p>But some of apps the above command is not working, we need to remove "-n" option from the above command. Like following.</p>
  
  <pre><code>adb shell am start &lt;PackageName&gt;/&lt;ActivityName&gt;
  </code></pre>
  
  <p>What is the use of "-n" option? why sometimes we can not able to launch app using "-n" option?</p>