I have problems to understand the documentation of ItemizedOverlay, so
I tried to build a clickable overlay with onTouchEvent. Drawing a
overlay over my googlemap works fine and add a onTouchEvent too. Now I
want that the onTouchEvent only works, when I touch the overlay. In
the moment it starts wherever I touch the map.
package de.bodprod.rettinfo;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import android.content.Intent;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Point;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.Toast;
public class BOSLstItemDetail extends MapActivity {
/** Called when the activity is first created. */
private List<Overlay> mapOverlays;
private MapController mc;
ArrayList<HashMap<String, Object>> boslst;
MyOverlay polygon;
private MapView mapView;
private GeoPoint gP;
//private MyOverlay myoverlay;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.boslst_item_detail);
//SQL ID der Leitstelle abfragen
Intent in = getIntent();
String id = in.getStringExtra("SQL_ID");
int sql_id = Integer.valueOf(id.toString());
// Daten der Leitstelle abfragen
boslst = new ArrayList<HashMap<String,Object>>();
DatabaseHandler db = new
DatabaseHandler(getApplicationContext());
boslst = db.getBOSLst(sql_id);
//Name der Leistelle
String bosname = boslst.get(0).get("name").toString();
//GPS Koordinaten der Leistelle
String lat_s = boslst.get(0).get("lat").toString();
String lng_s = boslst.get(0).get("lng").toString();
//Umwandeln der GPS Koordinaten
double lat = Double.parseDouble(lat_s);
double lng = Double.parseDouble(lng_s);
//Geo Point setzten für Startansicht
gP = new GeoPoint((int) (lat * 1E6),(int) (lng * 1E6));
mapView = (MapView) findViewById(R.id.mapview);//Creating an
instance of MapView
mapView.setBuiltInZoomControls(true);//Enabling the built-in
Zoom Controls
//Initializing the MapController and setting the map to center
at the
mc = mapView.getController();
mc.setCenter(gP);
mc.setZoom(10);
//Dateiname für GeopPoints festlegen
String gps = bosname.toLowerCase();
//GeoPoints für malen abfragen
ArrayList<GeoPoint> points = new ArrayList<GeoPoint>();
try{
InputStream koord = getAssets().open(gps);
if (koord != null) {
InputStreamReader input = new
InputStreamReader(koord);
BufferedReader buffreader = new
BufferedReader(input);
String line;
while (( line = buffreader.readLine()) != null)
{
String[] point_t = line.split(",");
double y =
Double.parseDouble(point_t[0]);
double x =
Double.parseDouble(point_t[1]);
points.add(new
GeoPoint((int)(x*1e6), (int)(y*1e6)));
}
koord.close();
polygon = new MyOverlay(points);
}
}catch (Exception e) {
Log.e("APP","Failed", e);
}
mapOverlays = mapView.getOverlays();
mapOverlays.add(polygon);
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
class MyOverlay extends Overlay{
ArrayList<GeoPoint> geoPoints;
public MyOverlay(ArrayList<GeoPoint> points){
geoPoints = points;
}
public void draw(Canvas canvas, MapView mapv, boolean shadow){
Paint paint = new Paint();
paint.setColor(Color.parseColor("#88ff0000"));
paint.setAlpha(50);
paint.setStyle(Paint.Style.FILL_AND_STROKE);
//Create path and add points
Path path = new Path();
Point firstPoint = new Point();
mapView.getProjection().toPixels(geoPoints.get(0),
firstPoint);
path.moveTo(firstPoint.x, firstPoint.y);
for(int i = 1; i < geoPoints.size(); ++i){
Point nextPoint = new Point();
mapView.getProjection().toPixels(geoPoints.get(i),
nextPoint);
path.lineTo(nextPoint.x, nextPoint.y);
}
//Close polygon
path.lineTo(firstPoint.x, firstPoint.y);
path.setLastPoint(firstPoint.x, firstPoint.y);
canvas.drawPath(path, paint);
super.draw(canvas, mapView, shadow);
}
public boolean onTouchEvent(MotionEvent event, MapView mapView)
{
//---when user lifts his finger---
if (event.getAction() == 1) {
GeoPoint pp = mapView.getProjection().fromPixels(
(int) event.getX(),
(int) event.getY());
Toast.makeText(getBaseContext(),
pp.getLatitudeE6() / 1E6 + "," +
pp.getLongitudeE6() /1E6 ,
Toast.LENGTH_SHORT).show();
}
return false;
}
}
}
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