使用MapView自定义绘图的奇怪绘图人工制品

时间:2010-09-29 19:57:40

标签: android android-mapview drawable

我正在尝试添加自己的drawable并在MapView上的一系列叠加层中使用它。 drawable基本上是一个圆形的盒子,黑色轮廓和中间的数字。

我已经设法使用下面的代码来实现这一点,但是我的盒子左边看起来像一个标志,我当然不认为我画了 - 所以我想知道它是什么。

这是图片的示例:alt text


编辑 - 如果绘制圆圈,会发生这种情况: alt text


我的代码如下:

Custom Drawable:

public class BikeDrawable extends Drawable {
  int colour;
  String bikes;

public BikeDrawable (int bikes){
    this.bikes = Integer.toString(bikes);
    if (bikes < 4) {
        colour = Color.RED;
    }
    else if (bikes > 3 && bikes < 9){
        colour = Color.argb(244, 255, 127, 42);
    }
    else {
        colour = Color.GREEN;
    }
}
@Override
public void draw(Canvas canvas) {
      Paint rectanglePaint = new Paint();
      rectanglePaint.setColor(colour);
      rectanglePaint.setStyle(Style.FILL);
      RectF rectangle = new RectF(0.0f, 0.0f, 20.0f, 20.0f);
      Paint strokepaint = new Paint();
      strokepaint.setStyle(Paint.Style.STROKE);
      strokepaint.setStrokeWidth(2);
      strokepaint.setARGB(255, 0, 0, 0);

      canvas.drawRoundRect(rectangle, 4.0f, 4.0f, rectanglePaint);
      canvas.drawRoundRect(rectangle, 4.0f, 4.0f, strokepaint);

      Paint textpaint = new Paint();
      textpaint.setARGB(255, 0, 0, 0);
      textpaint.setTextAlign(Paint.Align.CENTER);
      canvas.drawText(bikes, 10, 14, textpaint);
}

@Override
public int getOpacity() {
    return 0;
}

@Override
public void setAlpha(int alpha) {
}

@Override
public void setColorFilter(ColorFilter cf) {
}

}

在MapView中使用:

bikeOverlay = new PointsOverlay(start_icon);
BikeDrawable start_1_drawable = new BikeDrawable (start_1.capacity);
OverlayItem start_1_overlayitem = new OverlayItem(new GeoPoint(start_1.lat,start_1.lon), null, null);
start_1_overlayitem.setMarker(start_1_drawable);
mapOverlays.add(bikeOverlay);
bikeOverlay.addOverlay(start_1_overlayitem);

有谁知道这里发生了什么?它是来自OverlayItem的人工制品吗?

1 个答案:

答案 0 :(得分:0)

这是通过覆盖PointsOverlay的draw()方法实现的,如下所示:

@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow)
{
    if(!shadow)
    {
        super.draw(canvas, mapView, false);
    }
}

感谢etteyafed - 如果你回答的话,我会把这些积分归功于你,但我想关闭它。