Navigation drawer - back button

Question

Navigation drawer - back button

Navigation

#1 by (-1 votes)

1

I'm trying to make the back or back button of android keep the sequence of fragments that I'm rendering according to the option chosen in my navigation menu (Navigation Drawer), however I can not, it always closes the app when I click on it back and does not return the previous pro fragment where it was. I'm doing the following:

@Override
public boolean onNavigationItemSelected(MenuItem item) {

    int id = item.getItemId();

    switch (id) {
        case R.id.nav_home:
            myFragment = new SliderFragment();
            break;
        case R.id.nav_program:
            myFragment = new ProgramFragment();
            break;
        case R.id.nav_ticket:
            myFragment = new TicketFragment();
            break;
        case R.id.nav_togo:
            myFragment = new HowtogoFragment();
            break;
        case R.id.nav_map:
            myFragment = new MapFragment();
            break;
        case R.id.nav_social:
            myFragment = new SocialFragment();
            break;
        case R.id.nav_festival:
            myFragment = new FestivalFragment();
            break;
        case R.id.nav_contact:
            myFragment = new ContactFragment();
            break;
    }

    setTitle(item.getTitle(););

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

    FragmentManager fragmentManager = getSupportFragmentManager();
    fragmentManager
            .beginTransaction()
            .replace(R.id.content_frame, myFragment)
            .addToBackStack(null)
            .commit();

    return true;
}

And I'm not getting the click of the button back like this:

@Override
public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);

    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
        super.onBackPressed();
    }
}

How could I keep the button back normally? Returning always to the previous fragment, with action bar title and corresponding selected menu item?

android android-fragment

asked by anonymous 12.04.2016 / 07:40

1 answer

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score -1 · Answer 1

Instead of FragmentManager, use FragmentTransaction.

Example:

 import android.support.v4.app.FragmentTransaction;

 FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
                    ft.replace(R.id.content_frame, myFragment);
                    ft.addToBackStack(null);
                    ft.commit();