The old "Activity cannot be launched" on appium 1.4.13

My script can install my apk fine but cannot launch it because it cannot find the activity. My android gradle project structure is src/main/java/com/me.android/main/MainActivity. My script:

File projectDir = new File(System.getProperty("user.dir"));
File app = new File(projectDir, APK_NAME);

DesiredCapabilities capabilities = new DesiredCapabilities();
capabilities.setCapability("deviceName", "My S6");
capabilities.setCapability("platformVersion", "5.1");
String absPath = app.getAbsolutePath();
capabilities.setCapability("app", absPath);
capabilities.setCapability("appPackage", "com.me.android.internal.debug");
capabilities.setCapability("appActivity", ".main.MainActivity");
driver = new AndroidDriver<>(new URL("http://127.0.0.1:4723/wd/hub"), capabilities);

According http://appium.io/slate/en/master/?ruby#appium-server-capabilities, appPackage is “Java package of the android app you want to run”. Running the following command gave me “com.me.android.internal.debug”:

./aapt dump badging ~/myAndroidApp/mobile/build/outputs/apk/mobile-internal-debug-
unaligned.apk | grep package:\ name

My manifest says:

<activity
        android:name=".main.MainActivity"
        android:screenOrientation="portrait"
        android:theme="@style/Theme.myApp">
        android:theme="@style/Theme.xyx.Theme2"
        android:label="@string/start_name"
        android:windowSoftInputMode="adjustPan">
        <intent-filter>
            <action android:name="android.intent.action.MAIN"/>

            <category android:name="android.intent.category.DEFAULT"/>
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>

I also tried com.me.android.internal.debug.main with just .MainActivity

manually launch app on device and see below command output to print Launcher Activity
run adb logcat | grep “appName”