title: reopen app from background
body: <p>When user press "Home Button" my app go to Background, but is still running. I need bring my app to front again. For example i've this code:</p>
  
  <pre><code>Context ctx=getApplicationContext();
  Intent i =ctx.getPackageManager().getLaunchIntentForPackage("com.example.test");      
  ctx.startActivity(i);
  </code></pre>
  
  <p>but this code is to open app in different activity, there are a method or something to do this "correctly"? </p>