我想在地图视图上画一个圆.我想要用户输入半径,对于那个半径,我必须在地图上显示圆.之后,我必须在该圈子的某些位置显示标记.
这对我来说非常重要,我试图在互联网上找到提示,但我无法做到这一点.请帮助我……..
提前致谢..
解决方法
在ItemizedOverlay的实现中,从onDraw方法中执行类似于drawCircle的方法
@H_404_14@protected void drawCircle(Canvas canvas,Point curScreenCoords) {
curScreenCoords = toScreenPoint(curScreenCoords);
int CIRCLE_RADIUS = 50;
// Draw inner info window
canvas.drawCircle((float) curScreenCoords.x,(float) curScreenCoords.y,CIRCLE_RADIUS,getInnerPaint());
// if needed,draw a border for info window
canvas.drawCircle(curScreenCoords.x,curScreenCoordsy,getBorderPaint());
}
private Paint innerPaint,borderPaint;
public Paint getInnerPaint() {
if (innerPaint == null) {
innerPaint = new Paint();
innerPaint.setARGB(225,68,89,82); // gray
innerPaint.setAntiAlias(true);
}
return innerPaint;
}
public Paint getBorderPaint() {
if (borderPaint == null) {
borderPaint = new Paint();
borderPaint.setARGB(255,82);
borderPaint.setAntiAlias(true);
borderPaint.setStyle(Style.STROKE);
borderPaint.setStrokeWidth(2);
}
return borderPaint;
}
@Override
protected void onDraw(Canvas canvas) {
Point p = new Point();
for(OverlayItem item : items) {
drawCircle(canvas,getProjection().toPixels(item.getPoint(),p));
}
}
