/**
* 绘制文字，该文字随地图变化有透视效果
* @return 文字对象
*/
public TextItem DrawText()
{
double mLat = 39.86923;
double mLon = 116.397428;
int lat = (int)(mLat * 1E6);
int lon = (int)(mLon * 1E6);
//构建文字
TextItem item = new TextItem();
//设置文字位置
item.Pt = new GeoPoint(lat, lon);
//设置文件内容
item.Text = "百度地图SDK";
//设文字大小
item.FontSize = 40;
Symbol symbol = new Symbol();
Symbol.Color bgColor = new Com.Baidu.Mapapi.Map.Symbol.Color(symbol);
//设置文字背景色
bgColor.Red = 0;
bgColor.Blue = 0;
bgColor.Green = 255;
bgColor.Alpha = 50;
Symbol.Color fontColor = new Com.Baidu.Mapapi.Map.Symbol.Color(symbol);
//设置文字着色
fontColor.Alpha = 255;
fontColor.Red = 0;
fontColor.Green = 0;
fontColor.Blue = 255;
//设置对齐方式
item.Align = TextItem.AlignCenter;
//设置文字颜色和背景颜色
item.FontColor = fontColor;
item.BgColor = bgColor;
return item;
}
/**
* 绘制圆，该圆随地图状态变化
* @return 圆对象
*/
public Graphic DrawCircle()
{
double mLat = 39.90923;
double mLon = 116.447428;
int lat = (int)(mLat * 1E6);
int lon = (int)(mLon * 1E6);
GeoPoint pt1 = new GeoPoint(lat, lon);
//构建圆
Geometry circleGeometry = new Geometry();
//设置圆中心点坐标和半径
circleGeometry.SetCircle(pt1, 2500);
//设置样式
Symbol circleSymbol = new Symbol();
Symbol.Color circleColor = new Com.Baidu.Mapapi.Map.Symbol.Color(circleSymbol);
circleColor.Red = 0;
circleColor.Green = 255;
circleColor.Blue = 0;
circleColor.Alpha = 126;
circleSymbol.SetSurface(circleColor, 1, 3, new Com.Baidu.Mapapi.Map.Symbol.Stroke(3, new Com.Baidu.Mapapi.Map.Symbol.Color(circleSymbol, Android.Graphics.Color.ParseColor("#FFFF0000").ToArgb())));
//生成Graphic对象
Graphic circleGraphic = new Graphic(circleGeometry, circleSymbol);
return circleGraphic;
}
/**
* 绘制单点，该点状态不随地图状态变化而变化
* @return 点对象
*/
public Graphic DrawPoint()
{
double mLat = 39.98923;
double mLon = 116.397428;
int lat = (int)(mLat * 1E6);
int lon = (int)(mLon * 1E6);
GeoPoint pt1 = new GeoPoint(lat, lon);
//构建点
Geometry pointGeometry = new Geometry();
//设置坐标
pointGeometry.SetPoint(pt1, 10);
//设定样式
Symbol pointSymbol = new Symbol();
Symbol.Color pointColor = new Com.Baidu.Mapapi.Map.Symbol.Color(pointSymbol);
pointColor.Red = 0;
pointColor.Green = 126;
pointColor.Blue = 255;
pointColor.Alpha = 255;
pointSymbol.SetPointSymbol(pointColor);
//生成Graphic对象
Graphic pointGraphic = new Graphic(pointGeometry, pointSymbol);
return pointGraphic;
}
/**
* 绘制多边形，该多边形随地图状态变化
* @return 多边形对象
*/
public Graphic DrawPolygon()
{
double mLat = 39.93923;
double mLon = 116.357428;
int lat = (int)(mLat * 1E6);
int lon = (int)(mLon * 1E6);
GeoPoint pt1 = new GeoPoint(lat, lon);
mLat = 39.91923;
mLon = 116.327428;
lat = (int)(mLat * 1E6);
lon = (int)(mLon * 1E6);
GeoPoint pt2 = new GeoPoint(lat, lon);
mLat = 39.89923;
mLon = 116.347428;
lat = (int)(mLat * 1E6);
lon = (int)(mLon * 1E6);
GeoPoint pt3 = new GeoPoint(lat, lon);
mLat = 39.89923;
mLon = 116.367428;
lat = (int)(mLat * 1E6);
lon = (int)(mLon * 1E6);
GeoPoint pt4 = new GeoPoint(lat, lon);
mLat = 39.91923;
mLon = 116.387428;
lat = (int)(mLat * 1E6);
lon = (int)(mLon * 1E6);
GeoPoint pt5 = new GeoPoint(lat, lon);
//构建多边形
Geometry polygonGeometry = new Geometry();
//设置多边形坐标
GeoPoint[] polygonPoints = new GeoPoint[5];
polygonPoints[0] = pt1;
polygonPoints[1] = pt2;
polygonPoints[2] = pt3;
polygonPoints[3] = pt4;
polygonPoints[4] = pt5;
polygonGeometry.SetPolygon(polygonPoints);
//设置多边形样式
Symbol polygonSymbol = new Symbol();
Symbol.Color polygonColor = new Com.Baidu.Mapapi.Map.Symbol.Color(polygonSymbol);
polygonColor.Red = 0;
polygonColor.Green = 0;
polygonColor.Blue = 255;
polygonColor.Alpha = 126;
polygonSymbol.SetSurface(polygonColor, 1, 5);
//生成Graphic对象
Graphic polygonGraphic = new Graphic(polygonGeometry, polygonSymbol);
return polygonGraphic;
}
/**
* 绘制弧线
*
* @return 折线对象
*/
public Graphic DrawArc()
{
double mLat = 39.97923;
double mLon = 116.357428;
int lat = (int)(mLat * 1E6);
int lon = (int)(mLon * 1E6);
GeoPoint pt1 = new GeoPoint(lat, lon);
mLat = 39.94923;
mLon = 116.397428;
lat = (int)(mLat * 1E6);
lon = (int)(mLon * 1E6);
GeoPoint pt2 = new GeoPoint(lat, lon);
mLat = 39.97923;
mLon = 116.437428;
lat = (int)(mLat * 1E6);
lon = (int)(mLon * 1E6);
GeoPoint pt3 = new GeoPoint(lat, lon);
Geometry arcGeometry = new Geometry();
arcGeometry.SetArc(pt1, pt3, pt2);
// 设定样式
Symbol arcSymbol = new Symbol();
Symbol.Color arcColor = new Com.Baidu.Mapapi.Map.Symbol.Color(arcSymbol);
arcColor.Red = 255;
arcColor.Green = 0;
arcColor.Blue = 225;
arcColor.Alpha = 255;
arcSymbol.SetLineSymbol(arcColor, 4);
// 生成Graphic对象
Graphic arcGraphic = new Graphic(arcGeometry, arcSymbol);
return arcGraphic;
}
/**
* 绘制折线，该折线状态随地图状态变化
* @return 折线对象
*/
public Graphic DrawLine()
{
double mLat = 39.97923;
double mLon = 116.357428;
int lat = (int)(mLat * 1E6);
int lon = (int)(mLon * 1E6);
GeoPoint pt1 = new GeoPoint(lat, lon);
mLat = 39.94923;
mLon = 116.397428;
lat = (int)(mLat * 1E6);
lon = (int)(mLon * 1E6);
GeoPoint pt2 = new GeoPoint(lat, lon);
mLat = 39.97923;
mLon = 116.437428;
lat = (int)(mLat * 1E6);
lon = (int)(mLon * 1E6);
GeoPoint pt3 = new GeoPoint(lat, lon);
//构建线
Geometry lineGeometry = new Geometry();
//设定折线点坐标
GeoPoint[] linePoints = new GeoPoint[3];
linePoints[0] = pt1;
linePoints[1] = pt2;
linePoints[2] = pt3;
lineGeometry.SetPolyLine(linePoints);
//设定样式
Symbol lineSymbol = new Symbol();
Symbol.Color lineColor = new Com.Baidu.Mapapi.Map.Symbol.Color(lineSymbol);
lineColor.Red = 255;
lineColor.Green = 0;
lineColor.Blue = 0;
lineColor.Alpha = 255;
lineSymbol.SetLineSymbol(lineColor, 10);
//生成Graphic对象
Graphic lineGraphic = new Graphic(lineGeometry, lineSymbol);
return lineGraphic;
}
