How to get fragment from inflated layout

问题:

I have inflated layout content_main.xml to view variable vi

How should I get the fragment from this inflated view?

Maybe something like :

SupportMapFragment mapFragment = (SupportMapFragment) inflatedView.getSupportFragmentManager()
                .findFragmentById(R.id.map);


public void getMapFragment()
{
    LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View vi = inflater.inflate(R.layout.content_main, null);

    CoordinatorLayout mainL = (CoordinatorLayout) findViewById(R.id.main_view);
    mainL.removeAllViews();
    mainL.addView(vi);

    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
            .findFragmentById(R.id.map);
    mapFragment.getMapAsync(this);
}

Thank you for the answer!

回答1:

If your inflated layout contains a <fragment/> tag, i.e. if your fragment is inflated the XML way with the activity it resides in, then you can "get" the fragment via:

SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);

You ask the FragmentManager to find your fragment, which is different from asking a View to find it.

If your inflated layout contains a fragment which you added programmatically, i.e. you put a tag in the XML of your activity and used a FragmentTransaction to add the fragment to your view (with a TAG!), then you can "get" the fragment via:

SupportMapFragment mapFragment = (SupportMapFragment) 
          getSupportFragmentManager().findFragmentByTag("MAP");

See this source for further information about fragments.