两个坐标间画线

/** Called when the activity is first created. */ 
 
@Override 
 
public void onCreate(Bundle savedInstanceState) { 
 
 super.onCreate(savedInstanceState); 
 
 setContentView(R.layout.main); 
 
 linearLayout = (LinearLayout) findViewById(R.id.zoomview); 
 
 mapView = (MapView) findViewById(R.id.mapview); 
 
 mapView.setBuiltInZoomControls(true); 
 
 mapOverlays = mapView.getOverlays(); 
 
 projection = mapView.getProjection(); 
 
 mapOverlays.add(new MyOverlay()); 
 
} 
 
@Override 
 
protected boolean isRouteDisplayed() { 
 
 return false; 
 
} 
 
class MyOverlay extends Overlay{ 
 
 public MyOverlay(){ 
 
 } 
 
 public void draw(Canvas canvas, MapView mapv, boolean shadow){ 
 
 super.draw(canvas, mapv, shadow); 
 
 mPaint = new Paint(); 
 
 mPaint.setDither(true); 
 
 mPaint.setColor(Color.RED); 
 
 mPaint.setStyle(Paint.Style.FILL_AND_STROKE); 
 
 mPaint.setStrokeJoin(Paint.Join.ROUND); 
 
 mPaint.setStrokeCap(Paint.Cap.ROUND); 
 
 mPaint.setStrokeWidth(2); 
 
 GeoPoint gP1 = new GeoPoint(19240000,-99120000); 
 
 GeoPoint gP2 = new GeoPoint(37423157, -122085008); 
 
 Point p1 = new Point(); 
 
 Point p2 = new Point(); 
 
 path = new Path(); 
 
 projection.toPixels(gP1, p1); 
 
 projection.toPixels(gP2, p2); 
 
 path.moveTo(p2.x, p2.y); 
 
 path.lineTo(p1.x,p1.y); 
 
 canvas.drawPath(path, mPaint); 
 
 }