Google Maps v2 - 设置我的位置并放大

时间:2012-12-28 18:37:32

标签: android api google-maps google-maps-api-2

我的问题是,有没有人知道如何设置谷歌地图,打开我的位置和放大视图?

目前,主视图向非洲开放,一路缩小。

所以我现在一直在寻找几天,我能找到的只有:

1)你无法在一个谷歌地图中制作两件事(比如放大并转到我的位置)?因此,如果我可以在设置动画之前弄清楚如何设置缩放,那么这个问题就可以解决了。这往往是问题,你可以改变一个,但不能两者兼而有之。

2)我发现其他可能有用的类,但是如何设置代码没有任何帮助,因此类可以操作谷歌地图。

到目前为止,这是我一直坚持的代码,有些是有效的,有些则没有。我认为有些可能会在以后有用。

package com.MYWEBSITE.www;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import android.content.Context;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;

public class MainActivity extends FragmentActivity {
private GoogleMap map;  

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

    map = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
    map.setMyLocationEnabled(true);

    //LocationSource a = (LocationSource) getSystemService(Context.LOCATION_SERVICE);
    //LocationManager b = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    //map.setLocationSource(a);

    Criteria criteria = new Criteria();
    LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    String provider = locationManager.getBestProvider(criteria, false);
    Location location = locationManager.getLastKnownLocation(provider);
    double lat =  location.getLatitude();
    double lng = location.getLongitude();
    LatLng coordinate = new LatLng(lat, lng);

    //CameraPosition.Builder x = CameraPosition.builder();
    //x.target(coordinate);
    //x.zoom(13);

    //Projection proj = map.getProjection();
    //Point focus = proj.toScreenLocation(coordinate);

    //map.animateCamera(CameraUpdateFactory.newLatLng(coordinate));
    map.animateCamera(CameraUpdateFactory.zoomBy(13));
    //map.moveCamera(CameraUpdateFactory.newLatLng(coordinate));


    ////LatLngBounds bounds = mMap.getProjection().getVisibleRegion().latLngBounds;
}
}

11 个答案:

答案 0 :(得分:197)

  

您无法在一个Google地图中制作两件事(例如放大和转到我的位置)?

从编码的角度来看,你可以按顺序进行:

    CameraUpdate center=
        CameraUpdateFactory.newLatLng(new LatLng(40.76793169992044,
                                                 -73.98180484771729));
    CameraUpdate zoom=CameraUpdateFactory.zoomTo(15);

    map.moveCamera(center);
    map.animateCamera(zoom);

在这里,我首先移动相机,然后为相机设置动画,但两者都可能是animateCamera()个来电。 GoogleMap是否将这些合并为一个事件,我不能说,因为它过快。 : - )

Here is the sample project我从中提取了上述代码。


对不起,这个答案是有缺陷的。通过创建CameraPosition,然后从CameraUpdate创建CameraPosition,请参见Rob's answer,了解真正做到这一点的方法。

答案 1 :(得分:161)

可以一次性更改位置,缩放,方位和倾斜。也可以在animateCamera()电话上设置持续时间。

CameraPosition cameraPosition = new CameraPosition.Builder()
    .target(MOUNTAIN_VIEW)      // Sets the center of the map to Mountain View
    .zoom(17)                   // Sets the zoom
    .bearing(90)                // Sets the orientation of the camera to east
    .tilt(30)                   // Sets the tilt of the camera to 30 degrees
    .build();                   // Creates a CameraPosition from the builder
map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));

在这里查看文档:

https://developers.google.com/maps/documentation/android/views?hl=en-US#moving_the_camera

答案 2 :(得分:51)

这是您问题的简单解决方案

LatLng coordinate = new LatLng(lat, lng);
CameraUpdate yourLocation = CameraUpdateFactory.newLatLngZoom(coordinate, 5);
map.animateCamera(yourLocation);

答案 3 :(得分:13)

尝试这种方式 -

public class SummaryMapActivity extends FragmentActivity implements LocationListener{

 private GoogleMap mMap;
 private LocationManager locationManager;
 private static final long MIN_TIME = 400;
 private static final float MIN_DISTANCE = 1000;

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

    if (mMap == null) {
        // Try to obtain the map from the SupportMapFragment.
        mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                .getMap();
        // Check if we were successful in obtaining the map.
        if (mMap != null) {
            mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
        }
    }
    mMap.setMyLocationEnabled(true);

    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME, MIN_DISTANCE, this); 


}

@Override
public void onLocationChanged(Location location) {
    LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
    CameraUpdate cameraUpdate = CameraUpdateFactory.newLatLngZoom(latLng, 15);
    mMap.animateCamera(cameraUpdate);
    locationManager.removeUpdates(this);

}

@Override
public void onProviderDisabled(String provider) {
    // TODO Auto-generated method stub

}

@Override
public void onProviderEnabled(String provider) {
    // TODO Auto-generated method stub

}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
    // TODO Auto-generated method stub

}

}

答案 4 :(得分:7)

你也可以设置两个参数,如

mMap.moveCamera( CameraUpdateFactory.newLatLngZoom(new LatLng(21.000000, -101.400000) ,4) );

这会将您的地图定位在特定位置并进行缩放。我在设置地图时使用它。

答案 5 :(得分:3)

这是一个迟到的答案,但我认为这会有所帮助。使用此方法:

protected void zoomMapInitial(LatLng finalPlace, LatLng currenLoc) {
    try {
        int padding = 200; // Space (in px) between bounding box edges and view edges (applied to all four sides of the bounding box)
        LatLngBounds.Builder bc = new LatLngBounds.Builder();

        bc.include(finalPlace);
        bc.include(currenLoc);
        googleMap.moveCamera(CameraUpdateFactory.newLatLngBounds(bc.build(), padding));
    } catch (Exception e) {
        e.printStackTrace();
    }
}

加载地图后使用此方法。干杯!

答案 6 :(得分:1)

最简单的方法是使用CancelableCallback。您应该检查第一个操作是否完成,然后调用第二个操作:

mMap.animateCamera(CameraUpdateFactory.newLatLngBounds(bounds, size.x, height, 0), new CancelableCallback() {

                @Override
                public void onFinish() {
                    CameraUpdate cu_scroll = CameraUpdateFactory.scrollBy(0, 500);
                    mMap.animateCamera(cu_scroll);
                }

                @Override
                public void onCancel() {
                }
            });

答案 7 :(得分:1)

1.在布局中添加xml代码以显示地图。

2.启用google maps api然后获取下面的api密钥位置。

<fragment
                   android:id="@+id/map"
               android:name="com.google.android.gms.maps.MapFragment"
                    android:layout_width="match_parent"
                    android:value="ADD-API-KEY"
                    android:layout_height="250dp"
                    tools:layout="@layout/newmaplayout" />
        <ImageView
            android:id="@+id/transparent_image"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:src="@color/transparent" />

3.在oncreate中添加此代码。

 MapFragment mapFragment = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
    mapFragment.getMapAsync(UpadateProfile.this);

4.在oncreate之后添加此代码。然后用标记访问当前位置 放在那个

@Override
public void onMapReady(GoogleMap rmap) {
    DO WHATEVER YOU WANT WITH GOOGLEMAP
    map = rmap;
    setUpMap();
}
public void setUpMap() {
    map.setMapType(GoogleMap.MAP_TYPE_HYBRID);
  map.setMyLocationEnabled(true);
    map.setTrafficEnabled(true);
    map.setIndoorEnabled(true);
    map.getCameraPosition();
    map.setBuildingsEnabled(true);
    map.getUiSettings().setZoomControlsEnabled(true);
    markerOptions = new MarkerOptions();
    markerOptions.title("Outlet Location");
    map.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
        @Override
        public void onMapClick(LatLng point) {
            map.clear();
            markerOptions.position(point);
            map.animateCamera(CameraUpdateFactory.newLatLng(point));
            map.addMarker(markerOptions);
            String all_vals = String.valueOf(point);
            String[] separated = all_vals.split(":");
            String latlng[] = separated[1].split(",");
            MyLat = Double.parseDouble(latlng[0].trim().substring(1));
            MyLong = Double.parseDouble(latlng[1].substring(0,latlng[1].length()-1));
            markerOptions.title("Outlet Location");
            getLocation(MyLat,MyLong);
        }
    });
}
public void getLocation(double lat, double lng) {
    Geocoder geocoder = new Geocoder(UpadateProfile.this, Locale.getDefault());
    try {
        List<Address> addresses = geocoder.getFromLocation(lat, lng, 1);
   } catch (IOException e) {
         TODO Auto-generated catch block
        e.printStackTrace();
        Toast.makeText(this,e.getMessage(),Toast.LENGTH_SHORT).show();
    }
}
@Override
public void onLocationChanged(Location location) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}

答案 8 :(得分:0)

@ CommonsWare的回答实际上并没有起作用。我发现这个工作正常:

map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(-33.88,151.21), 15));

答案 9 :(得分:0)

您无法在一个Google地图中制作两件事(例如放大并转到我的位置) 因此,使用移动和动画相机进行缩放

googleMapVar.moveCamera(CameraUpdateFactory.newLatLng(LocLtdLgdVar));
googleMapVar.animateCamera(CameraUpdateFactory.zoomTo(10));

答案 10 :(得分:-2)

gmap.animateCamera(CameraUpdateFactory.newCameraPosition(new CameraPosition(new LatLng(9.491327, 76.571404), 10, 30, 0)));