我尝试显示一个谷歌地图到它的纬度和经度为 +34° 6' 46.53", +35° 39' 1.04 的位置，我构建了这段代码
public class conactus extends Activity {
//instance variables for Marker icon drawable resources
private int userIcon;
//the map
private GoogleMap theMap;
//user marker
private Marker userMarker;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_connectus);
//get drawable IDs
userIcon = R.drawable.yellow_point;
//find out if we already have it
if(theMap==null){
//get the map
theMap = ((MapFragment)getFragmentManager().findFragmentById(R.id.map)).getMap();
//check in case map/ Google Play services not available
if(theMap!=null){
//ok - proceed
theMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
//update location
updatePlaces();
}
}
}
private void updatePlaces(){
//get last location
double lat = 34.112924;
double lng = 35.650288;
//create LatLng
LatLng lastLatLng = new LatLng(lat, lng);
//remove any existing marker
if(userMarker!=null) userMarker.remove();
//create and set marker properties
userMarker = theMap.addMarker(new MarkerOptions()
.position(lastLatLng)
.title("You are here")
.icon(BitmapDescriptorFactory.fromResource(userIcon))
.snippet("Your last recorded location"));
//move to location
theMap.animateCamera(CameraUpdateFactory.newLatLng(lastLatLng), 3000, null);
}
}
但是当我在真实设备上运行应用程序并且在设备上激活 google play 服务后，我用 logcat 得到了未显示的 map
09-06 16:13:30.609: I/Google Maps Android API(18952): Failed to contact Google servers. Another attempt will be made when connectivity is established.
09-06 16:13:30.629: E/Google Maps Android API(18952): Failed to load map. Error contacting Google servers. This is probably an authentication issue (but could be due to network errors).
最佳答案
1.尝试添加以下权限
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
2. 更改 API key 后 AndroidManifest.xml 必须 清除应用程序数据
清除应用程序数据:
要么转到设置>应用程序管理器>选择您的应用程序>点击清除数据
或者 必须先卸载应用程序，然后再安装它! 注意不要重新安装 除非您完全卸载应用程序以完全清除其数据
关于java - map 未显示在我的 Android 应用程序中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/18658760/