Android 4.4 installs sms app by default without user confirmation

Is it possible to change the default sms app to Android 4.4 without any knowledge? I am trying to do this on a ROOTED Galaxy S5 using reflection and system call methods, so this is what I have done so far:

Created a small app that implements everything that the app needs to be an SMS manager (according to http://android-developers.blogspot.in/2013/10/getting-your-sms-apps-ready-for-kitkat.html ) and I can make it the default sms, but Android asks me to confirm this in a dialog box. Now I am researching Android source code and found something in this class:

https://github.com/android/platform_packages_apps_settings/blob/2abbacb7d46657e5863eb2ef0035521ffc41a0a8/src/com/android/settings/SmsDefaultDialog.java

So, I'm trying to call an inner method:

SmsApplication.setDefaultApplication(mNewSmsApplicationData.mPackageName, this);

      

        
        
        
      

    

through reflection, and this is how I have done it so far:

Class[] params = new Class[2];
    params[0]=String.class;
    params[1]=Context.class;
    Class cls = null;
    try {
        cls = Class.forName("com.android.internal.telephony.SmsApplication");
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
    Method method = null;
    try {
        method = cls.getDeclaredMethod("getSmsApplicationData", params);
    } catch (NoSuchMethodException e) {
        e.printStackTrace();
    }
    try {
        Object[] params2 = new Object[2];
        params2[0]=getPackageName();
        params2[1]=getApplicationContext();
        Log.d("Current package", getPackageName());
        method.invoke(null, params2);
    } catch (InvocationTargetException e) {
        e.printStackTrace();
    }

      

        
        
        
      

    

And I made this app for system apps and put it in / system / private app folder, rebooted my phone and started successfully with adb, but when I click the button that executes the code above, nothing happens. No errors, no log output, but the default application is still Messaging (com.android.mms).

Is there a way to do this?