CODEWITHSUNDEEP
androidgoogle-maps-android-api-2
user2163853
user2163853

Reputation: 917

SupportMapFragment - cannot cast from Fragment to MapFragment

Trying to put together a little MapFragment in an activity I'm building, but am having some trouble getting it all to work. I know that the Maps api and Play services are both installed correctly, as I did the test tutorial and everything worked fine.

Following the documentation here, I'm running into the following problem: In my setUpMapIfNeeded method, I can either use getFragmentManager() or getSupportFragmentManager(). When I use the getFragmentManager(), Eclipse is cool with it but when I run, I get a NoSuchMethodError saying that the method is undefined. When I opt for getSupportFragmentManager(), Eclipse doesn't like it and gives me the error "Cannot cast from Fragment to MapFragment". So what's the deal? Any suggestions?

private void setUpMapIfNeeded() {
    //Do a null check to confirm that we have not already instantiated the map.
    if (mMap == null) {
        mMap = ((MapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
        if (mMap != null) {
            //do things to the map
            mMap.addMarker(new MarkerOptions().position(LOCATION).title(EXTRA_URL));
            mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(LOCATION,15));
            mMap.getUiSettings().setZoomControlsEnabled(false);
        }
    }
}

Let me know if there's any other code I can provide and I'll be happy to post it quickly.

Upvotes: 18

Views: 26434

Answers (4)

Aliton Oliveira
Aliton Oliveira

Reputation: 1349

Change your dependencies to:

implementation 'com.google.android.gms:play-services-maps:16.1.0'
implementation 'com.google.android.gms:play-services-location:16.0.0'

Upvotes: 0

Avinash Ajay Pandey
Avinash Ajay Pandey

Reputation: 1517

hey simply add v4 jar to your libs folder and add to build then in your Fragment page just import

import android.support.v4.app.FragmentActivity;

you may able to extends FragmentActivity

public class MainActivity extends FragmentActivity implements LocationListener{

}

and it also access getSupportFragmentManager();

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

Upvotes: 0

Anderson Bressane
Anderson Bressane

Reputation: 426

This is what i had to do, because i was working under level 11;

    import com.google.android.gms.maps.GoogleMap;
    import com.google.android.gms.maps.SupportMapFragment;
    import android.support.v4.app.FragmentActivity;

    public class MapaActivity extends FragmentActivity {

    private GoogleMap map;

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

        map =  ((SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.mapa)).getMap();
    }
}

Upvotes: 1

CommonsWare
CommonsWare

Reputation: 1007554

I can either use getFragmentManager() or getSupportFragmentManager().

There should be no debate here. If getSupportFragmentManager() is available to you, then you are using the Android Support package's backport of fragments, and this is the method that you must use.

When I opt for getSupportFragmentManager(), Eclipse doesn't like it and gives me the error "Cannot cast from Fragment to MapFragment".

That is because you should not be using MapFragment. You are using the Android Support package's backport of fragments, and therefore you must use SupportMapFragment.

Upvotes: 82

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