Android Studio: Фрагмент не рисует фрагменты

Question

спасибо за то, что вы здесь делаете.

У меня есть простое приложение с только Main_Activity и nav_drawers с 12 фрагментами.

Все было безупречно (большое слово), пока я не добавилкоды для показа рекламы.

Часть некоторые ошибки в Gradle.app, когда я добавил 'com.google.android.gms: play-services-ads: 17.0.0' , который создаетнесовпадение с версиями, которое заставило меня использовать // noinspection и т. д.,

---> , теперь ящик больше не работает.Он застрял в главном действии.

---> Почему он больше не работает?Где ошибка?Журнал событий не говорит со мной.Я не изменил предыдущий код.

Это моя MainActivity.java

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {

private AdView mAdView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        MobileAds.initialize(this,
                "ca-app-pub-261529***APP****~****ID****");

        mAdView = findViewById(R.id.adView);
        AdRequest adRequest = new AdRequest.Builder().build();
        mAdView.loadAd(adRequest);


        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.addDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);     
        setTitle("Introduction"); 
        viewIntro fragment = new viewIntro();
        FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
        fragmentTransaction.replace(R.id.fram, fragment, "Introduction");
        fragmentTransaction.commit();
    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {            
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {        
        int id = item.getItemId();

        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {

        int id = item.getItemId();

        if (id == R.id.nav_view_intro) {
            setTitle("Introduction"); 
            viewIntro fragment = new viewIntro();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fram, fragment, "Introduction");
            fragmentTransaction.commit();

        } else if (id == R.id.nav_view_one) {
            setTitle("Tablet I"); 
            viewOne fragment = new viewOne();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fram, fragment, "Tablet I");
            fragmentTransaction.commit();

        } else if (id == R.id.nav_view_two) {
            setTitle("Tablet II"); 
            viewTwo fragment = new viewTwo();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fram, fragment, "Tablet II");
            fragmentTransaction.commit();

        } else if (id == R.id.nav_view_three) {
            setTitle("Tablet III"); 
            viewThree fragment = new viewThree();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fram, fragment, "Tablet III");
            fragmentTransaction.commit();

        } else if (id == R.id.nav_view_four) {
            setTitle("Tablet IV"); 
            viewFour fragment = new viewFour();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fram, fragment, "Tablet IV");
            fragmentTransaction.commit();

        } else if (id == R.id.nav_view_five) {
            setTitle("Tablet V"); 
            viewFive fragment = new viewFive();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fram, fragment, "Tablet V");
            fragmentTransaction.commit();

        } else if (id == R.id.nav_view_six) {
            setTitle("Tablet VI"); 
            viewSix fragment = new viewSix();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fram, fragment, "Tablet VI");
            fragmentTransaction.commit();

        } else if (id == R.id.nav_view_seven) {
            setTitle("Tablet VII"); 
            viewSeven fragment = new viewSeven();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fram, fragment, "Tablet VII");
            fragmentTransaction.commit();

        } else if (id == R.id.nav_view_eight) {
            setTitle("Tablet VIII"); 
            viewEight fragment = new viewEight();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fram, fragment, "Tablet VIII");
            fragmentTransaction.commit();

        } else if (id == R.id.nav_view_nine) {
            setTitle("Tablet IX"); 
            viewNine fragment = new viewNine();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fram, fragment, "Tablet IX");
            fragmentTransaction.commit();

        } else if (id == R.id.nav_view_ten) {
            setTitle("Tablet X"); 
            viewTen fragment = new viewTen();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fram, fragment, "Tablet X");
            fragmentTransaction.commit();

        } else if (id == R.id.nav_view_eleven) {
            setTitle("Tablet XI"); 
            viewEleven fragment = new viewEleven();
            FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
            fragmentTransaction.replace(R.id.fram, fragment, "Tablet XI");
            fragmentTransaction.commit();

            DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
            drawer.closeDrawer(GravityCompat.START);
            return true;
        }
        return true;
    }
}

XML-часть, которую я добавил для ADS:

<com.google.android.gms.ads.AdView
        xmlns:ads="http://schemas.android.com/apk/res-auto"
        android:id="@+id/adView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_alignParentBottom="true"
        ads:adSize="SMART_BANNER"
        ads:adUnitId="ca-app-pub-2615***UNIT****/****ID****">