i am trying to add some extra fragments to the existing code its not showing the other fragment. but toast is showing the clicked element id

[koteswaradk]

here is the code please let me know what is the the issue. i am using android studio 3.1 and its supporting library

public class MainActivity extends AppCompatActivity implements OnMenuItemClickListener
, OnMenuItemLongClickListener , FragmentLauncherFusion.OnFragmentInteractionListener
,FragmentMappedData.OnFragmentInteractionListener,FragmentFusionTemplateDetails.OnFragmentInteractionListener,FragmentChangeLog.OnFragmentInteractionListener,FragmentFeedBack.OnFragmentInteractionListener,
FragmentReadme.OnFragmentInteractionListener

{

private FragmentManager fragmentManager;
private ContextMenuDialogFragment mMenuDialogFragment;
String selectedString;
TextView mToolBarTextView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    fragmentManager = getSupportFragmentManager();
    initToolbar();
    initMenuFragment();
    addFragment(new MainFragment(), true, R.id.container);
   // getSupportFragmentManager().beginTransaction().replace(R.id.container, new FragmentLauncherFusion()).commit();

}

private void initMenuFragment() {
    MenuParams menuParams = new MenuParams();
    menuParams.setActionBarSize((int) getResources().getDimension(R.dimen.tool_bar_height));
    menuParams.setMenuObjects(getMenuObjects());
    menuParams.setClosableOutside(false);
    mMenuDialogFragment = ContextMenuDialogFragment.newInstance(menuParams);
    mMenuDialogFragment.setItemClickListener(this);
    mMenuDialogFragment.setItemLongClickListener(this);

}

private List<MenuObject> getMenuObjects() {
    // You can use any [resource, bitmap, drawable, color] as image:
    // item.setResource(...)
    // item.setBitmap(...)
    // item.setDrawable(...)
    // item.setColor(...)
    // You can set image ScaleType:
    // item.setScaleType(ScaleType.FIT_XY)
    // You can use any [resource, drawable, color] as background:
    // item.setBgResource(...)
    // item.setBgDrawable(...)
    // item.setBgColor(...)
    // You can use any [color] as text color:
    // item.setTextColor(...)
    // You can set any [color] as divider color:
    // item.setDividerColor(...)

    List<MenuObject> menuObjects = new ArrayList<>();

    MenuObject close = new MenuObject();
    close.setResource(R.drawable.icn_close);

    MenuObject send = new MenuObject("Launcher (Fusion)");
    send.setResource(R.drawable.icn_1);

    MenuObject like = new MenuObject("Mapped data");
    Bitmap b = BitmapFactory.decodeResource(getResources(), R.drawable.icn_2);
    like.setBitmap(b);

    MenuObject addFr = new MenuObject("Fusion Template details");
    BitmapDrawable bd = new BitmapDrawable(getResources(),
            BitmapFactory.decodeResource(getResources(), R.drawable.icn_3));
    addFr.setDrawable(bd);

    MenuObject addFav = new MenuObject("Change Log");
    addFav.setResource(R.drawable.icn_4);

    MenuObject block = new MenuObject("Feed back");
    block.setResource(R.drawable.icn_5);

    MenuObject readme = new MenuObject("Readme");
    readme.setResource(R.drawable.icn_5);

    menuObjects.add(close);
    menuObjects.add(send);
    menuObjects.add(like);
    menuObjects.add(addFr);
    menuObjects.add(addFav);
    menuObjects.add(block);
    menuObjects.add(readme);
    return menuObjects;
}

private void initToolbar() {
    Toolbar mToolbar = (Toolbar) findViewById(R.id.toolbar);
     mToolBarTextView = (TextView) findViewById(R.id.text_view_toolbar_title);
    setSupportActionBar(mToolbar);
    if (getSupportActionBar() != null) {
        getSupportActionBar().setHomeButtonEnabled(true);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowTitleEnabled(false);
    }
    mToolbar.setNavigationIcon(R.drawable.btn_back);
    mToolbar.setNavigationOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            onBackPressed();
        }
    });


}

protected void addFragment(Fragment fragment, boolean addToBackStack, int containerId) {
    invalidateOptionsMenu();
    String backStackName = fragment.getClass().getName();
    boolean fragmentPopped = fragmentManager.popBackStackImmediate(backStackName, 0);
    if (!fragmentPopped) {
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        transaction.add(containerId, fragment, backStackName)
                .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
        if (addToBackStack)
            transaction.addToBackStack(backStackName);
        transaction.commit();
    }
}

@Override
public boolean onCreateOptionsMenu(final Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onPrepareOptionsMenu(Menu menu) {
    MenuItem settingsItem = menu.findItem(R.id.context_menu);
    // set your desired icon here based on a flag if you like
    settingsItem.setIcon(getResources().getDrawable(R.drawable.btn_add));
    return super.onPrepareOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.context_menu:
            if (fragmentManager.findFragmentByTag(ContextMenuDialogFragment.TAG) == null) {
                mMenuDialogFragment.show(fragmentManager, ContextMenuDialogFragment.TAG);
            }
            break;
    }

    return super.onOptionsItemSelected(item);
}

@Override
public void onBackPressed() {
    if (mMenuDialogFragment != null && mMenuDialogFragment.isAdded()) {
        mMenuDialogFragment.dismiss();
    } else {
        finish();
    }
}

@Override
public void onMenuItemClick(View clickedView, int position) {
  //  Toast.makeText(this, "Clicked on position: " + position, Toast.LENGTH_SHORT).show();
   // Fragment fragment = null;
    switch (position){
        case 0:

            break;

        case 1:
            Toast.makeText(this, "Clicked on position: " + 11, Toast.LENGTH_SHORT).show();
            mToolBarTextView.setText("Launcher: Fusion");
           // fragment= new FragmentLauncherFusion();
            addFragment(new FragmentLauncherFusion(), true, R.id.container);
            break;
        case 2:
            Toast.makeText(this, "Clicked on position: " + 22, Toast.LENGTH_SHORT).show();
            mToolBarTextView.setText("Launcher: Mapped data");
           // fragment= new FragmentMappedData();
            addFragment(new FragmentMappedData(), true, R.id.container);
            break;
        case 3:
            Toast.makeText(this, "Clicked on position: " + 33, Toast.LENGTH_SHORT).show();
            mToolBarTextView.setText("Launcher: Fusion template details");
          // fragment= new FragmentFusionTemplateDetails();
            break;
        case 4:
            Toast.makeText(this, "Clicked on position: " + 44, Toast.LENGTH_SHORT).show();
            mToolBarTextView.setText("Launcher: Change Log");
           // fragment= new FragmentChangeLog();
            break;
        case 5:
            Toast.makeText(this, "Clicked on position: " + 55, Toast.LENGTH_SHORT).show();
            mToolBarTextView.setText("Launcher: Feed Back");
           // fragment= new FragmentFeedBack();
            break;
        case 6:
            Toast.makeText(this, "Clicked on position: " + 66, Toast.LENGTH_SHORT).show();
            mToolBarTextView.setText("Launcher: Readme");
           // fragment= new FragmentReadme();
            break;
    }
   /* if (fragment != null) {
        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.replace(R.id.container, fragment);
        ft.commit();
    }*/
}

@Override
public void onMenuItemLongClick(View clickedView, int position) {
   // Toast.makeText(this, "Long clicked on position: " + position, Toast.LENGTH_SHORT).show();
}

@Override
public void onFragmentInteraction(Uri uri) {

}