Fragment duplicates when I go to another Fragment

Question

Actually, this is my main problem. I've got a NavigationDrawer and I was changing lot of things about it; because I've added a TabHostFragment inside of it. The problem is when I'm in one Fragment , I've an ActionBar icon that goes to another Fragment . At the time to do this, it works perfect; but when I go to another Fragment , it still on the back of the new Fragment . I tried to put a BackGround color of each Fragment and it isn't visible.

The problem is that the transaction is OK; but when I'm in the other Fragment , when I press in a BlankSpace (For example) and on the old Fragment has a button here with a Toast , it's still showing this Toast on the new Fragment .

Here are a little examples of what happens maybe with images, you can understand better my question:

This main problem comes when I go trough this Fragment (I call it on MainActivity ) that has no sense; because I want to call it when I'm on a specific Fragment ; but it's in the only part that I can call this Fragment ...

This is the MainActivity , where I call this FragmentTransaction :

case R.id.newOffer:
    android.app.FragmentManager fm = getFragmentManager();
    android.app.FragmentTransaction ft = fm.beginTransaction();
    ft.replace(R.id.frame_container, new TipusNouProducte());
    ft.commit();
    return true;

And by the way, I leave here the code from my NavigationDrawer for you that always when I'm going through a Fragment , it says "Error on creating Fragment" :

private void displayView(int position) {
    mDrawerList.setItemChecked(position, true);
    mDrawerList.setSelection(position);
    setTitle(navMenuTitles[position]);
    mDrawerLayout.closeDrawer(mDrawerList);
    Fragment fragment = null;

    switch (position) {
        case 0:
            fragment = new TabHostFragment();
            break;
        case 1:
            fragment = new LocalizacionFragment();
            break;
        case 2:
            fragment = new ListaProductosFragment();
            break;
        case 3:
            fragment = new ConfiguracionFragment(this);
            break;
        case 4:
            fragment = new AyudaSugerenciasFragment();
            break;
        case 5:
            fragment = new AyudaSugerencias();
            break;
        case 6:
            finish();
            break;
        default:
            break;
    }

    if (fragment != null) {
        FragmentManager fragmentManager = getSupportFragmentManager();
        fragmentManager.beginTransaction()
            .replace(R.id.frame_container, fragment).commit(); 

        // update selected item and title, then close the drawer
        mDrawerList.setItemChecked(position, true);
        mDrawerList.setSelection(position);
        setTitle(navMenuTitles[position]);
        mDrawerLayout.closeDrawer(mDrawerList);
    } else {
        // error in creating fragment
        Log.e("MainActivity", "Error in creating fragment");
    }
}

If you need more code that you think can cause this problem, feel free to ask me; then I'll update ASAP.

TabHostFragment.xml

<android.support.v4.app.FragmentTabHost xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@android:id/tabhost"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >

        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" />

        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_weight="0" />

        <FrameLayout
            android:id="@+id/realtabcontent"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1" />
    </LinearLayout>

</android.support.v4.app.FragmentTabHost>

MainActivity code looks like:

public class MainActivity extends FragmentActivity {
    private DrawerLayout mDrawerLayout;
    private ListView mDrawerList;
    private ActionBarDrawerToggle mDrawerToggle;
    // saber si esta abierto
    public boolean mDrawerOpened;
    // nav drawer title
    private CharSequence mDrawerTitle;
    private FragmentTabHost mTabHost;
    // used to store app title
    private CharSequence mTitle;

    //para ponerlo visible
    public MenuItem mi;

    // slide menu items
    private String[] navMenuTitles;
    private TypedArray navMenuIcons;

    private ArrayList<NavDrawerItem> navDrawerItems;
    private NavDrawerListAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mTitle = mDrawerTitle = getTitle();

        // load slide menu items
        navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);

        // nav drawer icons from resources
        navMenuIcons = getResources()
            .obtainTypedArray(R.array.nav_drawer_icons);

        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        mDrawerList = (ListView) findViewById(R.id.list_slidermenu);

        navDrawerItems = new ArrayList<NavDrawerItem>();

        // adding nav drawer items to array
        // Home
        navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons.getResourceId(0, -1)));
        // Find People
        //navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1)));
        // Photos
        navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1)));
        // Communities, Will add a counter here
        navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons.getResourceId(2, -1)));
        // Pages
        navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons.getResourceId(3, -1)));
        // What's hot, We  will add a counter here
        navDrawerItems.add(new NavDrawerItem(navMenuTitles[4], navMenuIcons.getResourceId(4, -1)));
        //AyudaSugerencias
        navDrawerItems.add(new NavDrawerItem(navMenuTitles[5], navMenuIcons.getResourceId(5, -1)));
        navDrawerItems.add(new NavDrawerItem(navMenuTitles[6], navMenuIcons.getResourceId(6, -1)));

        // Recycle the typed array
        navMenuIcons.recycle();

        mDrawerList.setOnItemClickListener(new SlideMenuClickListener());

        // setting the nav drawer list adapter
        adapter = new NavDrawerListAdapter(getApplicationContext(),
            navDrawerItems);
        mDrawerList.setAdapter(adapter);

        // enabling action bar app icon and behaving it as toggle button
        getActionBar().setDisplayHomeAsUpEnabled(true);
        getActionBar().setBackgroundDrawable(new ColorDrawable(0xff1d97dd));
        getActionBar().setHomeButtonEnabled(true);

        mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
            R.drawable.ic_drawer, //nav menu toggle icon
            R.string.app_name, // nav drawer open - description for accessibility
            R.string.app_name // nav drawer close - description for accessibility
        ) {
            public void onDrawerClosed(View view) {
                getActionBar().setTitle(
                    Html.fromHtml("<font color='ffffff'>"
                        + mTitle + "</font>"));

                // calling onPrepareOptionsMenu() to show action bar icons
                invalidateOptionsMenu();
                mDrawerOpened = false;
                syncState();

            }

            public void onDrawerOpened(View drawerView) {
                getActionBar().setTitle(
                    Html.fromHtml("<font color='ffffff'>"
                        + mDrawerTitle + "</font>"));

                // calling onPrepareOptionsMenu() to hide action bar icons
                invalidateOptionsMenu();
                mDrawerOpened = true;
                syncState();
            }
        };
        mDrawerLayout.setDrawerListener(mDrawerToggle);

        if (savedInstanceState == null) {
            // on first time display view for first nav item
            displayView(0);
        }
    }

    /**
     * Slide menu item click listener
     */
    private class SlideMenuClickListener implements
        ListView.OnItemClickListener {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
            // display view for selected nav drawer item
            displayView(position);
        }
    }

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

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        Fragment fragment = null;
        // toggle nav drawer on selecting action bar app icon/title
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        // Handle action bar actions click
        switch (item.getItemId()) {
            case R.id.action_settings:
                return true;
            case R.id.ofertasRefresh:
                return true;
            case R.id.menu_search:
                return true;
            case R.id.newOffer:
                android.app.FragmentManager fm = getFragmentManager();
                android.app.FragmentTransaction ft = fm.beginTransaction();
                ft.replace(R.id.frame_container, new TipusNouProducte());
                ft.commit();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    /* *
     * Called when invalidateOptionsMenu() is triggered
     */

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        // if nav drawer is opened, hide the action items
        boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
        menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
        if (mDrawerOpened) {
            menu.removeItem(R.id.ofertasRefresh);
            menu.removeItem(R.id.menu_search);
            menu.removeItem(R.id.newOffer);
        }
        if (!mDrawerOpened) {
            menu.add(Menu.NONE, R.id.ofertasRefresh, Menu.NONE, mTitle);
        }
        return super.onPrepareOptionsMenu(menu);
    }

    /**
     * Diplaying fragment view for selected nav drawer list item
     */
    private void displayView(int position) {
        mDrawerList.setItemChecked(position, true);
        mDrawerList.setSelection(position);
        setTitle(navMenuTitles[position]);
        mDrawerLayout.closeDrawer(mDrawerList);
        Fragment fragment = null;

        switch (position) {
            case 0:
                fragment = new TabHostFragment();
                break;
            case 1:
                fragment = new LocalizacionFragment();
                break;
            case 2:
                fragment = new ListaProductosFragment();
                break;
            case 3:
                fragment = new ConfiguracionFragment(this);
                break;
            case 4:
                fragment = new AyudaSugerenciasFragment();
                break;
            case 5:
                fragment = new AyudaSugerencias();
                break;
            case 6:
                finish();
                break;
            default:
                break;
        }

        if (fragment != null) {
            FragmentManager fragmentManager = getSupportFragmentManager();
            fragmentManager.beginTransaction()
                .replace(R.id.frame_container, fragment).commit();

            // update selected item and title, then close the drawer
            mDrawerList.setItemChecked(position, true);
            mDrawerList.setSelection(position);
            setTitle(navMenuTitles[position]);
            mDrawerLayout.closeDrawer(mDrawerList);
        } else {
            // error in creating fragment
            Log.e("MainActivity", "Error in creating fragment");
        }
    }

    @Override
    public void setTitle(CharSequence title) {
        mTitle = title;
        getActionBar().setTitle(mTitle);
    }

    /**
     * When using the ActionBarDrawerToggle, you must call it during
     * onPostCreate() and onConfigurationChanged()...
     */
    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        // Sync the toggle state after onRestoreInstanceState has occurred.
        mDrawerToggle.syncState();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        // Pass any configuration change to the drawer toggls
        mDrawerToggle.onConfigurationChanged(newConfig);
    }
}

TabHostFragment looks like:

public class TabHostFragment extends Fragment {
    // Declaring our tabs and the corresponding fragments.
    public TabHostFragment(){

    }
    private FragmentTabHost mTabHost;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.tab_host_test2, container, false);
        mTabHost = (FragmentTabHost)rootView.findViewById(android.R.id.tabhost);
        mTabHost.setup(getActivity(), getChildFragmentManager(), R.id.realtabcontent);

        mTabHost.addTab(mTabHost.newTabSpec("Mis ofertas").setIndicator("Mis ofertas"),
            MisOfertasFragment.class, null);
        mTabHost.addTab(mTabHost.newTabSpec("Mis recomendaciones").setIndicator("Mis recomendaciones"),
            RecomendacionesFragment.class, null);

        return rootView;
    }
}

Answer 1

I'm not certain that this is the cause of your problem, but one thing that's definitely wrong is the use of the native FragmentManager instead of the one from the support library.

In your code, replace

case R.id.newOffer:
    android.app.FragmentManager fm = getFragmentManager();
    android.app.FragmentTransaction ft = fm.beginTransaction();
    ft.replace(R.id.frame_container, new TipusNouProducte());
    ft.commit();
    return true;

with

case R.id.newOffer:
    android.support.v4.app.FragmentManager fm = getSupportFragmentManager();
    android.support.v4.app.FragmentTransaction ft = fm.beginTransaction();
    ft.replace(R.id.frame_container, new TipusNouProducte());
    ft.commit();
    return true;

You have used the support library's FragmentManager at other places in your code, so you should continue to use that everywhere.

Also, TipusNouProducte should extend android.support.v4.app.Fragment and NOT android.app.Fragment .

I will update this answer if I find more issues.