Question

I want to draw a line dynamically as the user turns anywhere he goes. I am struggling on how to draw the lines using the user geopoints as we listen to his location continuously. I have tried to use moveTo and lineTo but it s only possible for only one line. Thanks for your answers in advance thanks.!

最新情况:

public void draw(Canvas canvas, MapView mv, boolean shadow)
{
    Projection projection = mv.getProjection();
    ArrayList<GeoPoint> geoPoints = new ArrayList<GeoPoint>();
    //Creating geopoints - ommited for readability
    Path p = new Path();
    for (int i = 0; i < geoPoints.size(); i++) {
    if (i == geoPoints.size() - 1) {
        break;
    }
    Point from = new Point();
    Point to = new Point();
    projection.toPixels(geoPoints.get(i), from);
    projection.toPixels(geoPoints.get(i + 1), to);
    p.moveTo(from.x, from.y);
    p.lineTo(to.x, to.y);
    }
    Paint mPaint = new Paint();
    mPaint.setStyle(Style.FILL);
    mPaint.setColor(0xFFFF0000);
    mPaint.setAntiAlias(true);
    canvas.drawPath(p, mPaint);
    super.draw(canvas, mv, shadow);
}

照片:

The drawing of line must follow wherever the user will be. draw track

Answer 1

您可使用Path,更具体地说:

private final Path mPath;
................
mPath.lineTo(lastXCoord,lastYCoord);

友情链接