title: The app icon is missing/doesn't appear android studio
body: <p>I have this layout and in the manifest, I placed the line <code>android:icon="@drawable/ic_launcher"</code>, but the app icon is not shown...</p>
  
  <p><strong>Layout's content:</strong></p>
  
  <pre><code>&lt;RelativeLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:paddingLeft="@dimen/activity_horizontal_margin"
      android:paddingRight="@dimen/activity_horizontal_margin"
      android:paddingTop="@dimen/activity_vertical_margin"
      android:paddingBottom="@dimen/activity_vertical_margin"
      tools:context=".java0"
      tools:ignore="MergeRootFrame"
      android:screenOrientation="portrait"
      android:icon="@drawable/ic_launcher"
      android:background="#ffff7e00"&gt;
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>Manifest's content:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="theapp.application.app.theapp" &gt;
  
      &lt;!-- Include required permissions for Google Mobile Ads to run--&gt;
      &lt;uses-permission android:name="android.permission.INTERNET"/&gt;
      &lt;uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/&gt;
  
      &lt;!--Agregado: Pantallas--&gt;
      &lt;supports-screens
          android:resizeable="true"
          android:smallScreens="true"
          android:normalScreens="true"
          android:largeScreens="true"
          android:xlargeScreens="true"
          android:anyDensity="true"/&gt;
  
      &lt;application
          android:screenOrientation="portrait"
          android:allowBackup="true"
          android:icon="@drawable/ic_launcher"
          android:label="@string/app_name"
          android:theme="@style/AppTheme"&gt;
          &lt;!--This meta-data tag is required to use Google Play Services.--&gt;
          &lt;meta-data android:name="com.google.android.gms.version"
              android:value="@integer/google_play_services_version" /&gt;
  
          &lt;activity
              android:screenOrientation="portrait"
              android:name=".java0"
              android:label="@string/app_name" &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;!--Include the AdActivity configChanges and theme. --&gt;
          &lt;activity android:name="com.google.android.gms.ads.AdActivity"
              android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
              android:theme="@android:style/Theme.Translucent" /&gt;
  
          &lt;activity
              android:screenOrientation="portrait"
              android:name=".java1"
              android:label="@string/app_name" &gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.intent.action.MAIN" /&gt;
                  &lt;category android:name="android.intent.category.DEFAULT" /&gt;
              &lt;/intent-filter&gt;
          &lt;/activity&gt;
  
          &lt;activity
              android:screenOrientation="portrait"
              android:name=".java2"
              android:label="@string/app_name" &gt;
              &lt;intent-filter&gt;
                  &lt;action android:name="android.intent.action.MAIN" /&gt;
                  &lt;category android:name="android.intent.category.DEFAULT" /&gt;
              &lt;/intent-filter&gt;
          &lt;/activity&gt;
  
  
  
      &lt;/application&gt;
  &lt;/manifest&gt;
  </code></pre>