我在Google地图v2上创建了一个多边形,现在在该多边形上我想添加一个网格,如参考图像所示,并且网格必须重新调整大小并且网格的部分应该是可选择的。
我对此没有任何想法,所以请帮忙。 到目前为止我正在尝试这个但仍然没有任何结果。 感谢您的所有帮助。
参考图片:
答案 0 :(得分:1)
不确定Google地图,但使用osmdroid时,您应该使用osmbonuspack
并实现自定义多边形:
public class GridPolygon extends Polygon {
private BitmapShader bitmapShader;
private IGeoPoint lastCenterGeoPoint;
private int xOffset = 0;
private int yOffset = 0;
public GridPolygon(Context ctx) {
super(ctx);
}
public void setPatternBMP(@NonNull final Bitmap patternBMP) {
bitmapShader = new BitmapShader(patternBMP, Shader.TileMode.REPEAT, Shader.TileMode.REPEAT);
mFillPaint.setShader(bitmapShader);
}
protected void recalculateMatrix(@NonNull final MapView mapView) {
//final int mapSize = TileSystem.MapSize(mapView.getZoomLevel());
final Projection projection = mapView.getProjection();
final IGeoPoint geoPoint = mapView.getMapCenter();
if (lastCenterGeoPoint == null) lastCenterGeoPoint = geoPoint;
final Point point = projection.toPixels(geoPoint, null);
final Point lastCenterPoint = projection.toPixels(lastCenterGeoPoint, null);
xOffset += lastCenterPoint.x - point.x;
yOffset += lastCenterPoint.y - point.y;
xOffset %= 100; // 100 is pixel size of shader image
yOffset %= 100;
final Matrix matrix = new Matrix();
matrix.reset();
matrix.setScale(1,1);
matrix.preTranslate(xOffset, yOffset);
//matrix.setTranslate(xOffset, yOffset);
bitmapShader.setLocalMatrix(matrix);
mFillPaint.setShader(bitmapShader);
lastCenterGeoPoint = geoPoint;
}
@Override
protected void draw(Canvas canvas, MapView mapView, boolean shadow) {
recalculateMatrix(mapView);
super.draw(canvas, mapView, shadow);
}
}