ちょっとこれは、半径と現在の位置を取得するために書いたものです。しかし、それは中央に表示されません。私は何を間違えましたか？以下に示すように、コーディングを手伝ってください。ありがとうございました
public class MappingActivity extends MapActivity {
/** Called when the activity is first created. */
MapController mControl;
GeoPoint GeoP;
MapView mapV;
Drawable d;
List<Overlay> overlaylist;
public double lat;
public double lng;
Button checkin, addplace;
private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 1; // in
// Meters
private static final long MINIMUM_TIME_BETWEEN_UPDATES = 10000; // in
// Milliseconds
protected LocationManager locationManager;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mapV = (MapView) findViewById(R.id.mapview);
checkin = (Button) findViewById(R.id.check);
addplace = (Button) findViewById(R.id.addp);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
MINIMUM_TIME_BETWEEN_UPDATES,
MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, new MyLocationListener());
Location location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
lat = 6;//location.getLatitude();
lng = 77.6;//location.getLongitude();
}
Button check = (Button) findViewById(R.id.check);
Button addplace = (Button) findViewById(R.id.addp);
Button nearby = (Button) findViewById(R.id.point);
check.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
TextView result = (TextView) findViewById(R.id.result);
result.setText("Checked the Plce");
}
});
addplace.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
TextView result = (TextView) findViewById(R.id.result);
result.setText("Added the Plce");
}
});
nearby.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
TextView result = (TextView) findViewById(R.id.result);
result.setText("Nearby the Plce");
}
});
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
public class MyLocationListener implements LocationListener {
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
String message = String.format("You are Here");
Toast.makeText(MappingActivity.this, message, Toast.LENGTH_LONG)
.show();
GeoP = new GeoPoint((int) (lat * 1E6), (int) (lng * 1E6));
mControl = mapV.getController();
mControl.animateTo(GeoP);
mControl.setZoom(19);
MapOverlay mapOverlay = new MapOverlay();
List<Overlay> listOfOverlays = mapV.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
mapV.invalidate();
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
class MapOverlay extends com.google.android.maps.Overlay
{
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
super.draw(canvas, mapView, shadow);
Projection projection = mapView.getProjection();
Point pt = new Point();
projection.toPixels(GeoP ,pt);
float circleRadius = projection.metersToEquatorPixels(50);
Paint innerCirclePaint;
innerCirclePaint = new Paint();
innerCirclePaint.setColor(Color.BLUE);
innerCirclePaint.setAlpha(25);
innerCirclePaint.setAntiAlias(true);
innerCirclePaint.setStyle(Paint.Style.FILL);
Paint CirclePaint;
CirclePaint = new Paint();
CirclePaint.setColor(Color.BLUE);
CirclePaint.setAlpha(100);
CirclePaint.setAntiAlias(true);
//---add the marker---
Bitmap bmp = BitmapFactory.decodeResource(
getResources(), R.drawable.point);
canvas.drawBitmap(bmp, pt.x, pt.y-bmp.getHeight(), CirclePaint);
super.draw(canvas,mapView,shadow);
canvas.drawCircle((float)pt.x, (float)pt.y, circleRadius, innerCirclePaint);
}
}
}
}