how to Make selectable appPackage and appActivity BeforeScenario in android Appium Test Automation

I want to choose starting app(appPackage,appActivity) in @BeforeScenario to develop a test scenarios for multiple apps in one test project. I know use the start activity but because of security permission denial, I can not use it. The only working method is using capabilities in beforeScenario. Before start the test I want to choose the starting app.My Code:

`@BeforeScenario
public void beforeScenario() throws MalformedURLException {

    DesiredCapabilities desiredCapabilities = new DesiredCapabilities();
desiredCapabilities
.setCapability(MobileCapabilityType.PLATFORM_NAME, MobilePlatform.ANDROID);
desiredCapabilities.setCapability(MobileCapabilityType.DEVICE_NAME, "device");
desiredCapabilities.setCapability(MobileCapabilityType.UDID, "L2N4C19924005752");
if (localAndroid) {
logger.info("Local Browser");
desiredCapabilities
.setCapability(AndroidMobileCapabilityType.APP_PACKAGE,
notapadAppPackageName);
desiredCapabilities
.setCapability(AndroidMobileCapabilityType.APP_ACTIVITY,
notepadAppActivityName);
}
desiredCapabilities.setCapability(MobileCapabilityType.AUTOMATION_NAME, "uiautomator2");
desiredCapabilities.setCapability(MobileCapabilityType.NO_RESET, true);
desiredCapabilities.setCapability(MobileCapabilityType.FULL_RESET, false);
desiredCapabilities.setCapability(MobileCapabilityType.NEW_COMMAND_TIMEOUT, 300);
desiredCapabilities.setCapability("unicodeKeyboard", false);
desiredCapabilities.setCapability("appWaitDuration", 30);
desiredCapabilities.setCapability("resetKeyboard", false);
URL url = new URL("http://localhost:4723/wd/hub");
appiumDriver = new AndroidDriver(url, desiredCapabilities);
selector = SelectorFactory
.createElementHelper(localAndroid ? SelectorType.ANDROID : SelectorType.IOS);
appiumDriver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
appiumFluentWait = new FluentWait(appiumDriver);
appiumFluentWait.withTimeout(8, TimeUnit.SECONDS)
.pollingEvery(350, TimeUnit.MILLISECONDS)
.ignoring(NoSuchElementException.class);
}

`

You can pass app name from VM aguements and base on that you can set driver instance. Please have a look on code below:

@BeforeScenario public void beforeScenario(String appName) throws MalformedURLException {
DesiredCapabilities desiredCapabilities = new DesiredCapabilities();
switch (appName) {
case "notepadApp":
desiredCapabilities.setCapability(AndroidMobileCapabilityType.APP_PACKAGE,notapadAppPackageName);
desiredCapabilities.setCapability(AndroidMobileCapabilityType.APP_ACTIVITY,notepadAppActivityName);
break;
case "App-A":
desiredCapabilities.setCapability(AndroidMobileCapabilityType.APP_PACKAGE,appAAppPackageName);
desiredCapabilities.setCapability(AndroidMobileCapabilityType.APP_ACTIVITY,appApadAppActivityName);
break;
case "App-B":
desiredCapabilities.setCapability(AndroidMobileCapabilityType.APP_PACKAGE,appBAppPackageName);
desiredCapabilities.setCapability(AndroidMobileCapabilityType.APP_ACTIVITY,appBApadAppActivityName);
break;
default:
System.out.println("No matching app is found.");
}
// Common desired capabilities set
desiredCapabilities.setCapability(MobileCapabilityType.PLATFORM_NAME, MobilePlatform.ANDROID);
desiredCapabilities.setCapability(MobileCapabilityType.DEVICE_NAME, "device");
desiredCapabilities.setCapability(MobileCapabilityType.UDID, "L2N4C19924005752");
desiredCapabilities.setCapability(MobileCapabilityType.AUTOMATION_NAME, "uiautomator2");
desiredCapabilities.setCapability(MobileCapabilityType.NO_RESET, true);
desiredCapabilities.setCapability(MobileCapabilityType.FULL_RESET, false);
desiredCapabilities.setCapability(MobileCapabilityType.NEW_COMMAND_TIMEOUT, 300);
desiredCapabilities.setCapability("unicodeKeyboard", false);
desiredCapabilities.setCapability("appWaitDuration", 30);
desiredCapabilities.setCapability("resetKeyboard", false);
URL url = new URL("http://localhost:4723/wd/hub");
appiumDriver = new AndroidDriver(url, desiredCapabilities);
selector = SelectorFactory
.createElementHelper(localAndroid ? SelectorType.ANDROID : SelectorType.IOS);
appiumDriver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
appiumFluentWait = new FluentWait(appiumDriver);
appiumFluentWait.withTimeout(8, TimeUnit.SECONDS)
.pollingEvery(350, TimeUnit.MILLISECONDS)
.ignoring(NoSuchElementException.class);
}