in google maps V2 ... fragment.getMap() returns null

Question

I can't get the map ! all I can get is null.

here is the code.

       public class MainActivity extends FragmentActivity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        SupportMapFragment fragment = new SupportMapFragment();
        getSupportFragmentManager().beginTransaction()
                .add(android.R.id.content, fragment).commit();


       GoogleMap map;
        map = fragment.getMap();
             //here i cant access this snippet because map = null 
        if(map!=null){
        UiSettings mm = map.getUiSettings();
        map.setMyLocationEnabled(true);
          } }
           }

The manifest:

 <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.anywhere_reminder"
android:versionCode="1"
android:versionName="1.0" >

    <uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />
    <uses-feature
    android:glEsVersion="0x00020000"
     android:required="true"/>

   <permission
    android:name="com.example.anywhere_reminder.permission.MAPS_RECEIVE"
    android:protectionLevel="signature" />

 <uses-permission android:name="com.example.anywhere_reminder.permission.MAPS_RECEIVE" />
 <uses-permission android:name="android.permission.INTERNET" />
 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
 <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
 <uses-permission   android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"     />

    <application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity android:name="com.google.android.gms.BuildConfig" />
    <activity
        android:name="com.example.anywhere_reminder.MainActivity"
        android:label="@string/app_name" >

        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
        </activity>

    <meta-data
     android:name="com.google.android.maps.v2.API_KEY"
   android:value=" my key "/> 

    </application>
    </manifest>

here is the xml:

  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context=".MainActivity" >


 <fragment xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/map"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 class="com.google.android.gms.maps.MapFragment"/>

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:text="@string/hello_world" />

  </RelativeLayout>

I tried to solve it like this solution Google Maps Android API v2 throws GooglePlayServicesNotAvailableException, out of date, SupportMapFragment.getMap() returns null .. but still did not work

UPDATE:

I got my map working now .. here is the edited working version

   public class MainActivity extends FragmentActivity {
 private GoogleMap myMap;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

          android.support.v4.app.FragmentManager myFragmentManager = getSupportFragmentManager();
          SupportMapFragment mySupportMapFragment 
           = (SupportMapFragment)myFragmentManager.findFragmentById(R.id.map);


             myMap = mySupportMapFragment.getMap();
             if(myMap!=null)
            myMap.setMyLocationEnabled(true);


        }

Answer 1

You are creating a dynamic fragment, via a FragmentTransaction. When you call commit(), the fragment has not yet been added to the screen, because the FragmentTransaction has only been scheduled to occur -- it has not occurred yet. Hence, the SupportMapFragment has not been called with onCreateView() yet, so there is no GoogleMap.

Either switch to static fragments (<fragment> tag in a layout), or delay your use of the GoogleMap until after the transaction has been processed.