在Android中绘制路线可折叠设备

Question

public class RouteOverlay extends Overlay {
    private GeoPoint gp1;
    private GeoPoint gp2;
    private int color;

    public RouteOverlay(GeoPoint gp1, GeoPoint gp2, int color) {
        this.gp1 = gp1;
        this.gp2 = gp2;
        this.color = color;
    }

    @Override
    public void draw(Canvas canvas, MapView mapView, boolean shadow) {
        Projection projection = mapView.getProjection();
        Paint paint = new Paint();
        Point point = new Point();
        projection.toPixels(gp1, point);
        paint.setColor(color);
        Point point2 = new Point();
        projection.toPixels(gp2, point2);
        paint.setStrokeWidth(5);
        paint.setAlpha(120);
        canvas.drawLine(point.x, point.y, point2.x, point2.y, paint);
        super.draw(canvas, mapView, shadow);
    }

}

private void drawPath(List<GeoPoint> geoPoints, int color) {    
    mapOverlays.clear();
    mapOverlays.add(myLocationOverlay);
    mapOverlays.add(itemizedoverlay);
    for (int i = 1; i < geoPoints.size(); i++) {            
    mapOverlays.add(new RouteOverlay(geoPoints.get(i - 1), geoPoints.get(i), color));
    }
    mapView.postInvalidate();

如果我做错了什么，有人能告诉我吗？提前谢了。

Answer 1

我发现我做错了什么。

当我调用drawPath函数时，在获得GeoPoints列表后，我做了一个循环来检查每个点的坐标。类似于

for (int i = 0; i < geoList.size(); i++){
    Log.i("GEOPOINT " + i, geoList.get(i).toString());
    drawpath(geoList, Color.BLUE);
}

drawPath函数被调用了N次。所以设备崩溃了。我的错。凌晨2:00编程对代码不好！