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我試圖做一個應用程序，它將顯示離線地圖上有一些可點擊的點。 我的問題是，當我測試我的應用程序時，地圖切片不會顯示。此外，只要移動地圖，可點擊的點（標記）就會消失。Osm瓷磚沒有顯示在Android應用程序
對問題的任何幫助或想法都會非常有幫助。
這裏是我的代碼：
MainActivity.java：
package com.cvasil05.offlinemapwithoverlay;
import java.util.ArrayList;
import org.osmdroid.tileprovider.tilesource.TileSourceFactory;
import org.osmdroid.util.GeoPoint;
import org.osmdroid.views.MapController;
import org.osmdroid.views.MapView;
import org.osmdroid.views.overlay.MyLocationOverlay;
import org.osmdroid.views.overlay.OverlayItem;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends Activity {
// Default map zoom level:
private int MAP_DEFAULT_ZOOM = 17;
// Default map Latitude:
private double MAP_DEFAULT_LATITUDE = 35.14476619358656E6;
// Default map Longitude:
private double MAP_DEFAULT_LONGITUDE = 33.409520387649536E6;
private MapView mymapView = null;
private MapController myMapController = null;
private MyLocationOverlay location = null;
LocationManager mylocmanager = null;
LocationListener myloclistener = null;
ArrayList<OverlayItem> OverlayItemArray = null;
MyOverlayItem overlay = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Initialize Map with its properties
mymapView = (MapView)findViewById(R.id.mapview);
mymapView.setBuiltInZoomControls(false);
mymapView.setMultiTouchControls(false);
mymapView.setTileSource(TileSourceFactory.MAPQUESTOSM);
// Initialize Map Controller
myMapController = mymapView.getController();
mylocmanager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
myloclistener = new LocationListener() {
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
public void onLocationChanged(Location location) {
myMapController.animateTo(new GeoPoint(location.getLatitude(), location.getLongitude()));
myMapController.setZoom(17);
mymapView.invalidate();
}
public void run() {
// TODO Auto-generated method stub
location.runOnFirstFix(new Runnable() {
public void run() {
mymapView.getController().animateTo(location.getMyLocation());
}
});
}
};
mylocmanager.requestLocationUpdates(LocationManager.GPS_PROVIDER,1000,0,myloclistener);
OverlayItemArray = new ArrayList<OverlayItem>();
// Points to be added
GeoPoint point1 = new GeoPoint(35.14392398396914E6, 33.40521812438965E6);
OverlayItem overlayitem1 = (OverlayItem) new OverlayItem("Εστίες", "Οι εστίες του Πανεπιστημίου Κύπρου.", point1);
OverlayItemArray.add(overlayitem1);
GeoPoint point2 = new GeoPoint(35.14447668501356E6, 33.41047525405884E6);
OverlayItem overlayitem2 = new OverlayItem("ΘΕΕ02", "Κτίριο Χημείας & Φυσικής.", point2);
OverlayItemArray.add(overlayitem2);
GeoPoint point3 = new GeoPoint(35.14461705293515E6, 33.41110825538635E6);
OverlayItem overlayitem3 = new OverlayItem("ΘΕΕ01", "Κτίριο Πληροφορικής & Μαθηματικών.", point3);
OverlayItemArray.add(overlayitem3);
GeoPoint point4 = new GeoPoint(35.14512588462148E6, 33.41071128845215E6);
OverlayItem overlayitem4 = new OverlayItem("ΧΩΔ01", "Χώροι Διδασκαλίας", point4);
OverlayItemArray.add(overlayitem4);
GeoPoint point5 = new GeoPoint(35.1459856274836E6, 33.41367244720459E6);
OverlayItem overlayitem5 = new OverlayItem("Κέντρο αθλητισμού", "Αποτελείται από το Γυμναστήριο, το Γήπεδο Τέννις και το Γύπεδο Φούτσαλ.", point5);
OverlayItemArray.add(overlayitem5);
// Add Points to Overlay
overlay = new MyOverlayItem(this, OverlayItemArray);
mymapView.getOverlays().add(overlay);
/*
// Get Location
location = new MyLocationOverlay(getApplicationContext(), mymapView);
// View Location
mymapView.getOverlays().add(location);
location.enableMyLocation();
location.disableFollowLocation();
*/
// Zoom and Center Map
myMapController.setZoom(MAP_DEFAULT_ZOOM);
myMapController.setCenter(new GeoPoint(MAP_DEFAULT_LATITUDE, MAP_DEFAULT_LONGITUDE));
}
// Create Menu
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
// Actions on Menu Options
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if(item.getItemId() == R.id.esties){
myMapController.setZoom(MAP_DEFAULT_ZOOM);
myMapController.setCenter(new GeoPoint(MAP_DEFAULT_LATITUDE, MAP_DEFAULT_LONGITUDE));
}
return super.onOptionsItemSelected(item);
}
}
MyOverlayItem.java：
package com.cvasil05.offlinemapwithoverlay;
import java.util.List;
import org.osmdroid.views.MapView;
import org.osmdroid.views.overlay.ItemizedIconOverlay;
import org.osmdroid.views.overlay.OverlayItem;
import android.app.AlertDialog;
import android.content.Context;
public class MyOverlayItem extends ItemizedIconOverlay<OverlayItem> {
private Context mContext;
public MyOverlayItem(final Context context, final List<OverlayItem> aList) {
super(context, aList, new OnItemGestureListener<OverlayItem>() {
public boolean onItemSingleTapUp(final int index,
final OverlayItem item) {
return false;
}
public boolean onItemLongPress(final int index,
final OverlayItem item) {
return false;
}
});
// TODO Auto-generated constructor stub
mContext = context;
}
@Override
protected boolean onSingleTapUpHelper(final int index, final OverlayItem item, final MapView mapView) {
AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);
dialog.setTitle(item.getTitle());
dialog.setMessage(item.getSnippet());
dialog.show();
return true;
}
}
我的XML文件是：
<org.osmdroid.views.MapView
android:id="@+id/mapview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:enabled="true"
android:clickable="true"
/>
，我已將此添加到我的清單文件：
<supports-screens
android:anyDensity="true"
android:resizeable="false"
android:largeScreens="true"
android:normalScreens="true" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />