title: Why my android studio doesn't launch app automatically after install(run)
body: <p>I build and run my project by clicking the green arrow on android studio, my app should be launched automatically but it just installed then nothing happened.</p>
  
  <p>I've tried reinstall android studio and create a new project but it still not fixed.</p>
  
  <p>This is my Run/Debug configuration (Just the default setting).</p>
  
  <p><a href="https://i.stack.imgur.com/0oDNw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0oDNw.png" alt="enter image description here"></a></p>
  
  <p>This is the android manifest</p>
  
  <pre><code>    &lt;application
          android:allowBackup="true"
          android:icon="@mipmap/ic_launcher"
          android:label="@string/app_name"
          android:roundIcon="@mipmap/ic_launcher_round"
          android:supportsRtl="true"
          android:theme="@style/AppTheme"&gt;
      &lt;activity android:name=".MainActivity"&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="android.intent.action.MAIN"/&gt;
  
              &lt;category android:name="android.intent.category.LAUNCHER"/&gt;
          &lt;/intent-filter&gt;
      &lt;/activity&gt;
  &lt;/application&gt;
  </code></pre>
  
  <p>I found the error message as below, why it disconnects?</p>
  
  <pre><code>04/20 16:37:14: Launching app
  $ adb install-multiple -r -t [my project path]\app\build\intermediates\split-apk\debug\slices\slice_2.apk [my project path]\app\build\intermediates\split-apk\debug\slices\slice_8.apk [my project path]\app\build\intermediates\split-apk\debug\slices\slice_7.apk [my project path]\app\build\intermediates\resources\instant-run\debug\resources-debug.apk [my project path]\app\build\intermediates\split-apk\debug\slices\slice_9.apk [my project path]\app\build\intermediates\split-apk\debug\slices\slice_5.apk [my project path]\app\build\intermediates\split-apk\debug\dep\dependencies.apk [my project path]\app\build\intermediates\split-apk\debug\slices\slice_6.apk [my project path]\app\build\intermediates\split-apk\debug\slices\slice_0.apk [my project path]\app\build\intermediates\split-apk\debug\slices\slice_1.apk [my project path]\app\build\intermediates\split-apk\debug\slices\slice_4.apk [my project path]\app\build\intermediates\split-apk\debug\slices\slice_3.apk [my project path]\app\build\intermediates\instant-run-apk\debug\app-debug.apk 
  Device emulator-5556disconnected, monitoring stopped.
  Split APKs installed in 1 s 572 ms
  </code></pre>