谷歌地图V2的Andr​​oid方法的GetMap（）返回null [英] Google map v2 android method getMap() returns null

问题描述

在我的应用程序，我使用谷歌地图编程，但是当我打电话的GetMap（）返回null。 连我都试过onActivityCreated（），但仍返回null。 有人请帮助我.. 这是我的code，

 公共无效callMap（）{
        尝试 {
            INT状态= GooglePlayServicesUtil
                    .isGooglePlayServicesAvailable（mActivity）;
            如果（状态== ConnectionResult.SUCCESS）{
                Log.d（sreedhu，谷歌Play业务可用）;
                GMO =（新GoogleMapOptions（））。zoomControlsEnabled（真）
                        .rotateGesturesEnabled（真正的）;
                mapFragment = SupportMapFragment.newInstance（GMO）;
                地图= mapFragment.getMap（）;
                经理= getFragmentManager（）;
                FragmentTransaction fragmentTransaction =经理
                .beginTransaction（）;
                fragmentTransaction.add（R.id.mapFragmentHole，mapFragment）;
                fragmentTransaction.commit（）;
                manager.executePendingTransactions（）;
                            mapFragment =的GetMap（）;
            }否则，如果（GooglePlayServicesUtil.isUserRecoverableError（状态））{
                ErrorDialogFragment.newInstance（状态）.show（
                        getFragmentManager（），errorDialog）;
            } 其他 {
                Toast.makeText（mActivity，谷歌地图v2的不可用，
                        Toast.LENGTH_LONG）.show（）;
                mActivity.popFragments（）;
            }

        }赶上（例外五）{
            Log.d（sreedhu，玩+ e.toString（））;
        }



    }
 

解决方案

最后，我对这个问题的修复...

我有这个下篇片段上onCreateView这解决了我的问题，

  SupportMapFragment mFragment;
     mFragment =新SupportMapFragment（）{
                @覆盖
                公共无效onActivityCreated（包savedInstanceState）{
                    super.onActivityCreated（savedInstanceState）;
                    如果（（图= mFragment.getMap（））！= NULL）{
                        setUpMap（）;
                    }
                }
            };
 

在地图上是prepared的SuppotMapFragment的onActivityCreated将调用这里你可以设置你的地图。

In my application I am using google map programmatically, but when I call getMap() it returns null. even I have tried onActivityCreated() but still it returns null. somebody please help me.. Here is my code,

public void callMap() {
        try {
            int status = GooglePlayServicesUtil
                    .isGooglePlayServicesAvailable(mActivity);
            if (status == ConnectionResult.SUCCESS) {
                Log.d("sreedhu", "Google Play Service Available");
                gmo = (new GoogleMapOptions()).zoomControlsEnabled(true)
                        .rotateGesturesEnabled(true);
                mapFragment = SupportMapFragment.newInstance(gmo);
                map=mapFragment.getMap();   
                manager=getFragmentManager();
                FragmentTransaction fragmentTransaction = manager
                .beginTransaction();
                fragmentTransaction.add(R.id.mapFragmentHole, mapFragment);
                fragmentTransaction.commit();           
                manager.executePendingTransactions();
                            mapFragment=getMap();
            } else if (GooglePlayServicesUtil.isUserRecoverableError(status)) {
                ErrorDialogFragment.newInstance(status).show(
                        getFragmentManager(), "errorDialog");
            } else {
                Toast.makeText(mActivity, "Google Map v2 not available",
                        Toast.LENGTH_LONG).show();
                mActivity.popFragments();
            }

        } catch (Exception e) {
            Log.d("sreedhu", "play" + e.toString());
        }



    }

解决方案

Finally, I got the fix for this problem...

I include this below piece of snippet on onCreateView which solved my problem,

SupportMapFragment mFragment;
     mFragment = new SupportMapFragment() {
                @Override
                public void onActivityCreated(Bundle savedInstanceState) {
                    super.onActivityCreated(savedInstanceState);
                    if ((map = mFragment.getMap()) != null) {
                        setUpMap();
                    }
                }
            };

Once the map is prepared the SuppotMapFragment's onActivityCreated will get called there you can setup your map.

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