1.在我的应用中 Gps LatLong 从服务器每个OneMinute获取。保存在共享首页中，然后获取 LatLong 来自共享首页显示地图上的标记。
2.每一分钟我想根据LatLong移动标记。
3.但在更改标记位置时。获得重复。
请帮我解决这个问题。
在 Oncreate 方法内部，我每隔60秒调用一次代码段，以便调用方法。
try
{
Thread t = new Thread()
{
@Override
public void run()
{
try
{
while (!isInterrupted())
{
Thread.sleep(60*1000);
getActivity().runOnUiThread(new Runnable()
{
@Override
public void run()
{
display_Location();
Log.i("Every 60 Second","Current Called..");
}
});
}
} catch (Exception e)
{
e.printStackTrace();
}
}
};
t.start();
}
catch (Exception e)
{
e.printStackTrace();
}
方法Iam使用：
private void display_Location()
{
try
{
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (mLastLocation != null)
{
/*For Current Location ping Starts Here*/
// get user data from session
HashMap<String, String> user = session.getGPSPING();
// UserLat
String LatLongUser = "";
LatLongUser = user.get(SessionManagerFor_Register.KEY_LATLONG);
if (!LatLongUser.equals("") || LatLongUser != null)
{
Log.i(" PING on MAP LatLong", LatLongUser);
String[] LanlongArr = LatLongUser.split("//");
List<String> Lanlonglist1 = Arrays.asList(LanlongArr);
int length = Lanlonglist1.size();
/*ArrayList For adding All ArrayList items in Single(Concating)*/
arraylist_DetailLineWalker = new ArrayList<String>(length);
for (int i = 0; i < length; i++) {
arraylist_DetailLineWalker.add(Lanlonglist1.get(i)
);
}
if (arraylist_DetailLineWalker != null)
{
// Initializing
LineWalkermMarkers_arr = new ArrayList<Marker>();
// just Remove Older Line Wlaker
if (LineWalkermMarkers_arr != null) {
// LineWalker_marker1.remove();
RemoveLineWalkerMarkers();
Log.i(TAG, "LineWalker REMOVED.............................");
}
for (int i = 0; i < arraylist_DetailLineWalker.size(); i++)
{
try
{
String Val = arraylist_DetailLineWalker.get(i).toString();
//Log.i(" Validation Id",Val);
VALUE_ARRAY_STRING = Val.toString().split("::");
LatLong_DataSaveTable = VALUE_ARRAY_STRING[0].toString();
System.out.println("checking STarted LatLong::" + LatLong_DataSaveTable);
String[] latlong = LatLong_DataSaveTable.split(",");
double latitude1 = Double.parseDouble(latlong[0]);
double longitude2 = Double.parseDouble(latlong[1]);
//To hold location
LatLng latLng1 = new LatLng(latitude1, longitude2);
//To create marker in map
MarkerOptions markerOptionsLineWalker = new MarkerOptions();
markerOptionsLineWalker.position(latLng1); //setting position
markerOptionsLineWalker.draggable(true); //Making the marker draggable
markerOptionsLineWalker.title("USER LOCAITON");
markerOptionsLineWalker.icon(BitmapDescriptorFactory.fromResource(R.drawable.walker_outof_fence_icon_red));
//adding marker to the map
// googleMap.addMarker(markerOptionsLineWalker);
LineWalker_marker1 = googleMap.addMarker(markerOptionsLineWalker);
LineWalkermMarkers_arr.add(LineWalker_marker1);
// LineWalker_marker1.setPosition(latLng1);
Log.i(TAG, " NEW Line Walkers PING Added.............................");
} catch (NumberFormatException e) {
e.printStackTrace();
}
}
} else {
Log.i("MAP NEwLatLong", "TOTAL ARRY LIST NULLL");
}
}
else
{
Log.i("MAP NEwLatLong", "Null Not LatLong");
Toast.makeText(getActivity(), "Lat Long Not Available..!", Toast.LENGTH_SHORT).show();
}
}
else
{
Log.i("Location EXception", "Couldn't get the location. Make sure location is enabled on the device");
// can't get location
// GPS or Network is not enabled
// Ask user to enable GPS/network in settings
gps.showSettingsAlert();
}
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
/*Remove the Linewalker*/
private void RemoveLineWalkerMarkers()
{
for (Marker marker: LineWalkermMarkers_arr)
{
marker.remove();
}
LineWalkermMarkers_arr.clear();
}
答案 0 :(得分：3)
if(arraylist_DetailLineWalker != null && arraylist_DetailLineWalker.size()>0){
arraylist_DetailLineWalker.clear()
mMap.clear();
showMarker();
}
答案 1 :(得分：2)
在初始化RemoveLineWalkerMarkers() LineWalkermMarkers_arr之后，您正在致电LineWalkermMarkers_arr = new ArrayList<Marker>();，因此您永远不会移除您的标记。
删除标记后，只需初始化LineWalkermMarkers_arr：
if (LineWalkermMarkers_arr != null) {
RemoveLineWalkerMarkers();
Log.i(TAG, "LineWalker REMOVED.............................");
}
LineWalkermMarkers_arr = new ArrayList<Marker>();
答案 2 :(得分：2)
解决方案只是一个逻辑变化
Marker初始化onCreate一次if(mGoogleMap != null) {
mGoogleMap.clear();
}
或其他方法//With your logic , this check should be done
if(arraylist_DetailLineWalker.size()>0){
RemoveLineWalkerMarkers();
}
LineWalkermMarkers_arr = new ArrayList<Marker>();
for (int i = 0; i < arraylist_DetailLineWalker.size(); i++)
{
}
private Marker mCurrentMarker;
private float ZOOMLEVEL=18.0f;
private LatLng previousLatLon;
private Handler mLocalHandler;
private GoogleMap mGoogleMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLocalHandler = new Handler();
previousLatLon=new LatLng(45.320372, 2.460161);
//Initialize Marker once Google Map object is created
mMarkerOptions = new MarkerOptions().icon(BitmapDescriptorFactory.fromResource(R.drawable.custom_marker_icon));
mMarkerOptions.position(previousLatLon);
mCurrentMarker = mGoogleMap.addMarker(mMarkerOptions);
}
/**
* Call this method to move marker in map to new location in map with updated location
* @param marker
* @param toPosition
* @param fromPosition
*/
public void animateMarker(final Marker marker, final LatLng toPosition,final LatLng fromPosition) {
final long duration = 500;
final Interpolator interpolator = new LinearInterpolator();
mLocalHandler.post(new Runnable() {
@Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - mStartTime;
float t = interpolator.getInterpolation((float) elapsed
/ duration);
marker.setPosition(toPosition);
marker.setAnchor(Constants.MAPANCHOR, Constants.MAPANCHOR);
mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(toPosition, ZOOMLEVEL));
if (t < 1.0) {
// Post again 16ms later.
mLocalHandler.postDelayed(this, 16);
} else {
marker.setVisible(true);
}
}
}
});
previousLatLon=toPosition;// reassign the previous location to current location
}
// Dummy implementation which only works for some type.
class Value {
long value_;
public:
template<class T>
T get()
{
return (T) value_;
}
template<class T>
Value& operator=(T const& x)
{
value_ = x;
return *this;
}
};