当我在Android中的Google maps v2中滚动地图时,如何获取中心点？

概述嗨我在我的应用程序非常做一个应用程序有一个地图页面,所以我实施谷歌地图V2,我有一个问题,当我滚动地图我想得到地图的中心点,如果我滚动地图和我离开它然后它得到地图的中心点所以任何人都可以建议解决这个问题它可能会有所帮助,谢谢你提前……. 注意：我使用过谷歌地图V2,所以请发布与之相关的内容. public class Mapview extends FragmentActivity impleme 嗨我在我的应用程序非常做一个应用程序有一个地图页面,所以我实施谷歌地图V2,我有一个问题,当我滚动地图我想得到地图的中心点,如果我滚动地图和我离开它然后它得到地图的中心点所以任何人都可以建议解决这个问题它可能会有所帮助,谢谢你提前…….

注意：我使用过谷歌地图V2,所以请发布与之相关的内容.

public class MapvIEw extends FragmentActivity implements OnMapClickListener,OnCamerachangelistener{final int RQS_GooglePlayServices = 1;private GoogleMap myMap;Location myLocation;TextVIEw tvLocinfo;GPSTracker gps;public double Latitude,Longitude;String Datetime,addr,RegUID;public String lat,longd;@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.mapvIEw);    tvLocinfo = (TextVIEw)findVIEwByID(R.ID.Locinfo);    FragmentManager myFragmentManager = getSupportFragmentManager();    SupportMapFragment mySupportMapFragment = (SupportMapFragment)myFragmentManager.findFragmentByID(R.ID.map);    myMap = mySupportMapFragment.getMap();    myMap.setMapType(GoogleMap.MAP_TYPE_norMAL);    myMap.setMyLocationEnabled(true);    myMap.setonMapClickListener(this);    Projection P = myMap.getProjection();    Log.e("lat",String.valueOf(Latitude));    Log.e("lat",String.valueOf(Longitude));    button mDone = (button) findVIEwByID(R.ID.button1);             mDone.setonClickListener(new VIEw.OnClickListener() {        @Suppresslint("SimpleDateFormat")        public voID onClick(VIEw v) {            //Toast.makeText(getBaseContext(),"latitude"+lat+""+"longitude"+longd,Toast.LENGTH_LONG).show();            String timeStamp = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(Calendar.getInstance().getTime());                            Datetime = timeStamp.toString();            Log.e("t",Datetime);                           RegUID = Utils.RegisterUserID;            Log.e("t",RegUID);            final ProgressDialog dialog = ProgressDialog.show(MapvIEw.this,"",Utils.Loading,true);            dialog.show();            Handler handler = new Handler();            handler.postDelayed(new Runnable(){                @SuppressWarnings("unused")                public voID run()                {                    try                    {                        String EMPLOYEE_SERVICE_URI = Utils.Request+"UserID="+RegUID+"&Location="+URLEncoder.encode(addr,"UTF-8")+"&Latitude="+lat+"&Longitude="+longd+"&RequestDate="+URLEncoder.encode(Datetime,"UTF-8");                        Log.e(EMPLOYEE_SERVICE_URI,EMPLOYEE_SERVICE_URI);                        JsONObject JObject = Utils.getResult(EMPLOYEE_SERVICE_URI);                        //Toast.makeText(MapvIEw.this,JObject.toString(),Toast.LENGTH_LONG).show();                        if(JObject!=null)                        {                                 if(JObject.getBoolean("ValID"))                            {                                AlertDialog alertDialog = new AlertDialog.Builder(MapvIEw.this).create();                                Utils.callAlert(JObject.getString("Message"),alertDialog);                            }                            else                            {                                AlertDialog alertDialog = new AlertDialog.Builder(MapvIEw.this).create();                                Utils.callAlert(JObject.getString("Message"),alertDialog);                            }                        }                        else                        {                            AlertDialog alertDialog = new AlertDialog.Builder(MapvIEw.this).create();                            Utils.callAlert(JObject.getString("Message"),alertDialog);                        }                    }                    catch (Exception e)                    {                        //Toast.makeText(MapvIEw.this,e.toString(),Toast.LENGTH_LONG).show();                        Log.e("Exception",e.toString());                    }                    dialog.dismiss();                }//run() ends              },5000);                       }    });}@OverrIDepublic boolean onCreateOptionsMenu(Menu menu) {    // Inflate the menu; this adds items to the action bar if it is present.    getMenuInflater().inflate(R.menu.main,menu);    return true;}@OverrIDeprotected voID onResume() {    // Todo auto-generated method stub    super.onResume();    int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());    if (resultCode == ConnectionResult.SUCCESS){        Toast.makeText(getApplicationContext(),"isGooglePlayServicesAvailable SUCCESS",Toast.LENGTH_LONG).show();    }else{        GooglePlayServicesUtil.getErrorDialog(resultCode,this,RQS_GooglePlayServices);    }}public boolean onScroll(MotionEvent e1,MotionEvent e2,float distanceX,float distanceY) {    Log.i("test","onScroll");    return false;}@OverrIDepublic voID onMapClick(LatLng point) {    Log.e("lat",String.valueOf(point.latitude));    Log.e("lat",String.valueOf(point.longitude));    Latitude =point.latitude;    Longitude = point.longitude;    lat = String.valueOf(point.latitude);    longd = String.valueOf(point.longitude);            myMap.moveCamera(CameraUpdateFactory.newLatLng(point));    gps = new GPSTracker(MapvIEw.this);    // check if GPS enabled         if(gps.canGetLocation())    {           Geocoder geoCoder = new Geocoder(getBaseContext(),Locale.getDefault());        try {            List<Address> addresses = geoCoder.getFromLocation(Latitude,Longitude,1);            if(addresses != null) {                Address returnedAddress = addresses.get(0);                StringBuilder strReturnedAddress = new StringBuilder("");                for(int i=0; i<returnedAddress.getMaxAddresslineIndex(); i++) {                    strReturnedAddress.append(returnedAddress.getAddressline(i)).append("\n");                  }                addr = new String(strReturnedAddress);                tvLocinfo.setText(addr.toString());                //Toast.makeText(getApplicationContext(),addr.toString(),Toast.LENGTH_LONG).show();            }            else            {                Toast.makeText(getApplicationContext(),"Gps location address is unavailable please try again later",Toast.LENGTH_LONG).show();            }        } catch (IOException e) {            // Todo auto-generated catch block            e.@R_404_1715@();        }    }}@OverrIDepublic voID onCameraChange(Cameraposition arg0) {    // Todo auto-generated method stub} }

解决方法 您可以使用：-

myMap.setonCameraChangedListener(this);

在听众中： –

onCameraChange(Cameraposition position) {    LatLng target = position.target;    // do what you need with the position here}

我不确定索引是否超出界限.但要设置默认地图位置,您可以使用以下内容： –

private voID setDefaultMapposition(LatLng latLng) {    Cameraposition camPos =            new Cameraposition.Builder().target(latLng)            .zoom(A_DEFAulT_MAP_ZOOM)            .bearing(0)            .tilt(0)            .build();    myMap.moveCamera(            CameraUpdateFactory.newCameraposition(camPos));   }

总结

以上是内存溢出为你收集整理的当我在Android中的Google maps v2中滚动地图时,如何获取中心点？全部内容，希望文章能够帮你解决当我在Android中的Google maps v2中滚动地图时,如何获取中心点？所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。