Ich entwickle einen benutzerdefinierten Kachelanbieter, um Verkehrsdaten in Google Maps anzuzeigen. In hohen Zoomstufen ist es gut für mich. Aber Polylinien überlappen sich bei niedrigem Zoom. Google Maps v2 Angepasster Tile-Provider
Meine eigene Fliese Provider-Klasse ist
public class PolylineTileProvider implements TileProvider {
private static final String TAG = "TileOverlay";
private final int mTileSize = 256;
private final SphericalMercatorProjection mProjection = new SphericalMercatorProjection(mTileSize);
private final int mScale = 2;
private final int mDimension = mScale * mTileSize;
private final List<PolylineOptions> polylines;
public PolylineTileProvider(List<PolylineOptions> polylines) {
this.polylines = polylines;
}
@Override
public Tile getTile(int x, int y, int zoom) {
Matrix matrix = new Matrix();
float scale = ((float) Math.pow(2, zoom) * mScale);
matrix.postScale(scale, scale);
matrix.postTranslate(-x * mDimension, -y * mDimension);
Bitmap bitmap = Bitmap.createBitmap(mDimension, mDimension, Bitmap.Config.ARGB_8888); //save memory on old phones
Canvas c = new Canvas(bitmap);
c.setMatrix(matrix);
drawCanvasFromArray(c, scale);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
return new Tile(mDimension, mDimension, baos.toByteArray());
}
private void drawCanvasFromArray(Canvas c, float scale) {
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeCap(Paint.Cap.ROUND);
paint.setStrokeJoin(Paint.Join.ROUND);
paint.setShadowLayer(0, 0, 0, 0);
paint.setAntiAlias(true);
if (polylines != null) {
for (int i = 0; i < polylines.size(); i++) {
List<LatLng> route = polylines.get(i).getPoints();
paint.setColor(polylines.get(i).getColor());
paint.setStrokeWidth(getLineWidth(polylines.get(i).getWidth(), scale));
Path path = new Path();
if (route != null && route.size() > 1) {
Point screenPt1 = mProjection.toPoint(route.get(0)); //first point
MarkerOptions m = new MarkerOptions();
m.position(route.get(0));
path.moveTo((float) screenPt1.x, (float) screenPt1.y);
for (int j = 1; j < route.size(); j++) {
Point screenPt2 = mProjection.toPoint(route.get(j));
path.lineTo((float) screenPt2.x, (float) screenPt2.y);
}
}
c.drawPath(path, paint);
}
}
}
private float getLineWidth(float width, float scale) {
return width/(scale);
}
}
Trafic Schicht bei Google Maps Android-Anwendung gezeigt wird, so gut.
Wie kann ich eine ähnliche Schicht machen. Danke im Voraus.