错误：类MapPane是public，应该在名为MapPane.java的文件中声明

Question

我使用此代码创建地图和标记但是当我运行它时会显示空白地图和错误

我的代码来自 - https://developers.google.com/maps/documentation/android-api/

ContactFragment.java

public class ContactFragment extends Fragment implements OnMapReadyCallback {

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

        MapFragment mapFragment = (MapFragment) getFragmentManager()
                .findFragmentById(R.id.mapView);
        mapFragment.getMapAsync(this);
    }

    @Override
    public void onMapReady(GoogleMap map) {
        LatLng sydney = new LatLng(-33.867, 151.206);

        map.setMyLocationEnabled(true);
        map.moveCamera(CameraUpdateFactory.newLatLngZoom(sydney, 13));

        map.addMarker(new MarkerOptions()
                .title("Sydney")
                .snippet("The most populous city in Australia.")
                .position(sydney));
    }
}

fragment_contact.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="layout.ContactFragment"
    android:background="@color/colorWhite"
    android:id="@+id/contact_wrapper">

    <!-- TODO: Update blank fragment layout -->

    <com.google.android.gms.maps.MapView
        android:layout_width="match_parent"
        android:id="@+id/mapView"
        android:layout_height="200dp" />

    <TextView
        android:text="Address - 1526 Petchaburi Rd. Makkasan Rajdhevee Bangkok 10400 Thailand"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textView6"
        android:layout_below="@+id/mapView"
        android:layout_alignParentStart="true"
        android:layout_marginTop="18dp"
        android:padding="10dp"
        android:textSize="18sp"
        android:textStyle="normal|bold" />

    <TextView
        android:text="Tel - +66-2652-7477-80, Fax +66-2652-7777"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textView7"
        android:padding="10dp"
        android:layout_below="@+id/textView3"
        android:layout_alignParentStart="true"
        android:textSize="18sp"
        android:textStyle="normal|bold"
        android:fontFamily="sans-serif" />

    <TextView
        android:text=" EMail - sdschool@sd.ac.th"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textView3"
        android:padding="10dp"
        android:textSize="18sp"
        android:layout_below="@+id/textView6"
        android:layout_alignParentStart="true"
        android:textStyle="normal|bold" />

</RelativeLayout>

这是我得到的错误

Answer 1

使用以下代码。

public class ContactFragment extends Fragment implements OnMapReadyCallback {

 View rootView 

    @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);
            setContentView(R.layout.content_main);


       rootView =inflater.inflate(R.layout.content_main, container, false);

        MapFragment mapFragment = (MapFragment) getFragmentManager()
                    rootView.findFragmentById(R.id.mapView);
            mapFragment.getMapAsync(this);

       return rootView; 

        }
}

Answer 2

创建Fragment时必须使用onCreateView（）回调来定义布局。