來源：http://blog.csdn.net/mwthe/article/details/49780161

主類中：

完成各種view初始化後，新增該程式碼

 MyTouchListener  myListener = new MyTouchListener(context, mapView,graphicsLayer);

mapView.setOnTouchListener(myListener);

 1、當點選地圖時，將點新增到圖層上並且將其渲染；

 2、當在螢幕上滑動時，將滑動生成的點逐步新增到poly變數中；

 3、當滑動完離開螢幕時，判斷是繪製的線還是面，當是面時，將第一個點追加到poly變數中，並將poly變數新增到圖層中去。

監聽類：

public  class MyTouchListener extends MapOnTouchListener {

            //此變數是用來儲存線或者面的軌跡資料的

           MultiPath poly;

           //判斷是執行的哪種繪圖方式，它可以為這三種值：point，polgyline，polgyon

           String type = "";

           //繪畫點時用於儲存點的變數

  Point startPoint = null;

           //地圖
           public MapView mapView;
           //圖層
           public GraphicsLayer graphicsLayer;

           //構造方法

           public MyTouchListener(Context context, MapView view) {

                 super(context, view);

           }

           //設定drawe的型別

           public void setType(String geometryType) {

this.type = geometryType;

           }

           public String getType() {

                 return this

           }

           //當我們繪製點時執行的處理函式

           public boolean onSingleTap(MotionEvent e) {

                 if (type.length() > 1 && type.equalsIgnoreCase("POINT")) {

                      graphicsLayer.removeAll();//繪製點時首先清除圖層要素

                       //生成點圖形，並設定相應的樣式

  Graphic graphic = new Graphic(mapView.toMapPoint(new Point(e.getX(), e

                                  .getY())),new SimpleMarkerSymbol(Color.RED,25,SimpleMarkerSymbol.STYLE.CIRCLE));

                      //將點要素新增到圖層上

                      graphicsLayer.addGraphic(graphic);

//設定按鈕可用

                      clearButton.setEnabled(true);

                      return true;

                 }

                 return false;

           }

            //當繪製線或者面時呼叫的函式

           public boolean onDragPointerMove(MotionEvent from, MotionEvent to) {

                 if (type.length() > 1

&& (type.equalsIgnoreCase("POLYLINE") || type.equalsIgnoreCase("POLYGON"))) {

                      //得到移動後的點

                      Point mapPt = mapView.toMapPoint(to.getX(), to.getY());

                      //判斷startPoint是否為空,如果為空，給startPoint賦值

                      if (startPoint == null) {

                            graphicsLayer.removeAll();

                            poly = type.equalsIgnoreCase("POLYLINE") ?new Polyline()

                                       : new Polygon();

                            startPoint = mapView.toMapPoint(from.getX(), from.getY());

                            //將第一個點存入poly中

poly.startPath((float) startPoint.getX(),(float) startPoint.getY());

                            Graphic graphic = new Graphic(startPoint,new SimpleLineSymbol(Color.RED,5));

                            graphicsLayer.addGraphic(graphic);

                      }

//將移動的點放入poly中

                      poly.lineTo((float) mapPt.getX(), (float) mapPt.getY());   

                      return true;

                 }

                 return super.onDragPointerMove(from, to);

           }

           //當繪製完線或面，離開螢幕時呼叫的函式

           @Override

public boolean onDragPointerUp(MotionEvent from, MotionEvent to) {

                 if (type.length() > 1

                            && (type.equalsIgnoreCase("POLYLINE") || type

                                       .equalsIgnoreCase("POLYGON"))) {

                      //判斷當繪製的是面時，將起始點填入到poly中形成閉合

                      if (type.equalsIgnoreCase("POLYGON")) {

poly.lineTo((float) startPoint.getX(),

                                       (float) startPoint.getY());

                            graphicsLayer.removeAll();

                            graphicsLayer.addGraphic(new Graphic(poly,new SimpleFillSymbol(Color.RED)));

                      }

                      //最後將poly圖形新增到圖層中去

                      graphicsLayer.addGraphic(new Graphic(poly,new SimpleLineSymbol(Color.BLUE,5)));

                      startPoint = null;

                      clearButton.setEnabled(true);

return true;

                 }

                 return super.onDragPointerUp(from, to);

           }

      }