android – 添加Overlay到OSMDROID

我一直在努力这么长时间.
我试图在我的地图上添加Overlay.
我使用的是开源OSMdroid.但我所得到的一切都是从一个角落到另一个角落的直线红线.
我的目标是添加一些我的geoPoint设置的图标.

这是我的代码：

package osmdemo.demo;

import java.util.List;

import microsoft.mappoint.TileSystem;

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.MapView.Projection;
import org.osmdroid.views.overlay.Overlay;
import org.osmdroid.views.overlay.ScaleBarOverlay;
import org.osmdroid.views.util.constants.MapViewConstants;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Rect;
import android.location.LocationManager;
import android.os.Bundle;

public class map extends Activity implements MapViewConstants
{

    /** Called when the activity is first created. */

    protected static final String PROVIDER_NAME = LocationManager.GPS_PROVIDER;
    MapController mapController;
    MapView mapView;
    ScaleBarOverlay mScaleBarOverlay;
    private MapOverlay mmapOverlay = null;
    private LocationManager mLocMgr;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mapView = (MapView) findViewById(R.id.mapview);

        mapView.setTileSource(TileSourceFactory.MAPNIK);
        mapView.setBuiltInZoomControls(true);
        mapView.setMultiTouchControls(true);

        mapController = mapView.getController();
        mapController.setZoom(20);
        GeoPoint point2 = new GeoPoint(31.987968,34.783069);
        mapController.setCenter(point2);

        this.mmapOverlay = new MapOverlay(this);

        List<Overlay> listofOverlays = mapView.getoverlays();
        listofOverlays.add(mmapOverlay);
        mapView.invalidate();
    }

    public class MapOverlay extends org.osmdroid.views.overlay.Overlay
    {

        public MapOverlay(Context ctx)
        {
            super(ctx);
            // Todo Auto-generated constructor stub
        }

        @Override
        protected void draw(Canvas pC,MapView pOsmv,boolean shadow)
        {
            if (shadow)
                return;

            Paint lp3;
            lp3 = new Paint();
            lp3.setColor(Color.RED);
            lp3.setAntiAlias(true);
            lp3.setStyle(Style.stroke);
            lp3.setstrokeWidth(1);
            lp3.setTextAlign(Paint.Align.LEFT);
            lp3.setTextSize(12);
            // Calculate the half-world size
            final Rect viewportRect = new Rect();
            final Projection projection = pOsmv.getProjection();
            final int zoomLevel = projection.getZoomLevel();
            int mWorldSize_2 = TileSystem.MapSize(zoomLevel) / 2;

            // Save the Mercator coordinates of what is on the screen
            viewportRect.set(projection.getScreenRect());
            // DON'T set offset with either of below
            // viewportRect.offset(-mWorldSize_2,-mWorldSize_2);
            // viewportRect.offset(mWorldSize_2,mWorldSize_2);

            // Draw a line from one corner to the other
            pC.drawLine(viewportRect.left,viewportRect.top,viewportRect.right,viewportRect.bottom,lp3);
        }

        public void onProviderdisabled(String arg0)
        {
        }

        public void onProviderEnabled(String provider)
        {
        }

    }

}

这是我的清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.test.overlay" android:versionCode="1" android:versionName="1.0">
    <uses-sdk android:minSdkVersion="3" />
    <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" />


    <application >
        <activity android:name=".OverlayDemo" android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
</manifest>

提前致谢,

射线.

解决方法

自从编写示例代码以来,jar版本3.0.3和3.0.4似乎有所改变.

如果您将应用程序基于上一个答案中引用的代码,那么更改该行

mResourceProxy = new ResourceProxyImpl(getApplicationContext());

至

mResourceProxy = new DefaultResourceProxyImpl(getApplicationContext());

这应该至少让你有一个默认图标.

编辑

这应该使地图中心位于利物浦的NE,并将图标放在中心位置.

package osmdemo.demo;

import java.util.ArrayList;
import org.osmdroid.DefaultResourceProxyImpl;
import org.osmdroid.ResourceProxy;
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.ItemizedIconOverlay;
import org.osmdroid.views.overlay.itemizedoverlay;
import org.osmdroid.views.overlay.OverlayItem;
import org.osmdroid.views.util.constants.MapViewConstants;

import android.app.Activity;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.Toast;

public class DemoMap extends Activity implements LocationListener,MapViewConstants {

    private MapView mMapView;
    private MapController mapController;
    private LocationManager mLocMgr;
    private itemizedoverlay<OverlayItem> mMyLocationOverlay;
    private ResourceProxy mResourceProxy;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mResourceProxy = new DefaultResourceProxyImpl(getApplicationContext());
        setContentView(R.layout.copymain);

        mMapView = (MapView) this.findViewById(R.id.mapview);
        mMapView.setTileSource(TileSourceFactory.MAPNIK);
        mMapView.setBuiltInZoomControls(true);
        mMapView.setMultiTouchControls(true);
        mapController = this.mMapView.getController();
        mapController.setZoom(15);
        GeoPoint point2 = new GeoPoint(53554070,-2959520); // centre map here
        GeoPoint point3 = new GeoPoint(53554070 + 1000,-2959520 + 1000); // icon goes here
        mapController.setCenter(point2);
        mLocMgr = (LocationManager) getSystemService(LOCATION_SERVICE);
        mLocMgr.requestLocationUpdates(LocationManager.GPS_PROVIDER,1000,100,this);

        ArrayList<OverlayItem> items = new ArrayList<OverlayItem>();
        // Put overlay icon a little way from map centre
        items.add(new OverlayItem("Here","SampleDescription",point3));

        /* OnTapListener for the Markers,shows a simple Toast. */
        this.mMyLocationOverlay = new ItemizedIconOverlay<OverlayItem>(items,new ItemizedIconOverlay.OnItemGestureListener<OverlayItem>() {
                    @Override
                    public boolean onItemSingleTapUp(final int index,final OverlayItem item) {
                        Toast.makeText(
                                DemoMap.this,"Item '" + item.mTitle,Toast.LENGTH_LONG).show();
                        return true; // We 'handled' this event.
                    }
                    @Override
                    public boolean onItemLongPress(final int index,Toast.LENGTH_LONG).show();
                        return false;
                    }
                },mResourceProxy);
        this.mMapView.getoverlays().add(this.mMyLocationOverlay);
        mMapView.invalidate();
    }

    public void onLocationChanged(Location location) {
        int lat = (int) (location.getLatitude() * 1E6);
        int lng = (int) (location.getLongitude() * 1E6);
        GeoPoint gpt = new GeoPoint(lat,lng);
        mapController.setCenter(gpt);
        mMapView.invalidate();
    }

    @Override
    public void onProviderdisabled(String arg0) {}
    @Override
    public void onProviderEnabled(String provider) {}
    @Override
    public void onStatusChanged(String provider,int status,Bundle extras) {}

}

它有点粗糙和准备,但至少它运行正常,只有3.0.4的jar和slf4j一个.希望它有帮助.

编辑2

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="osmdemo.demo"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name="DemoMap"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
    <uses-sdk android:minSdkVersion="3" />

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> 
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

</manifest>

.