Android App Development: Two icons getting created and I only need one

Does your application manifest list an intent filter under your sub-activity that matches the main launcher?

        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>

Make sure that your sub-activity is not filtering for these intents.

Edit: Just to be very clear, make sure the above lines are not listed under your sub-activity. That intent filter lets the Android system know that you intend for it to be listed as an entry point to your application.

We have the same problem but i fixed it this way before my code below in manifest

<application
        android:debuggable="true"
        android:allowBackup="true">
        <activity        android:name=".SplashActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.noupdate.apptest_noupdate.MainActivity"
            android:icon="@drawable/ic_launcher"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

Notice that in the SplashActivity inside the intent is this code

<intent-filter>
 <action android:name="android.intent.action.MAIN" />
  <category android:name="android.intent.category.LAUNCHER" />
 </intent-filter>

i only deleted the category

 <category android:name="android.intent.category.LAUNCHER" />

So after i deleted the intent-filter category in splash it didn't install two app icon but only one for main the code will be like this notice that the intent-filter category is deleted

<application
        android:debuggable="true"
        android:allowBackup="true">
        <activity     android:name=".SplashActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

            </intent-filter>
        </activity>
        <activity
            android:name="com.noupdate.apptest_noupdate.MainActivity"
            android:icon="@drawable/ic_launcher"
            android:theme="@android:style/Theme.NoTitleBar"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

it really helps