java地图文档放大_Java ME引路蜂地图开发示例：放大、缩小

RasterMap的 zoomIn,zoomOut 用来放大缩小地图。

//--------------------------------- PACKAGE ------------------------------------

package com.pstreets.gisengine.demo.midp;

//--------------------------------- IMPORTS ------------------------------------

import com.mapdigit.gis.geometry.GeoLatLng;

import com.mapdigit.gis.raster.MapType;

import com.pstreets.gisengine.demo.MapDemoMIDP;

import javax.microedition.lcdui.Command;

import javax.microedition.lcdui.CommandListener;

import javax.microedition.lcdui.Display;

import javax.microedition.lcdui.Displayable;

//[------------------------------ MAIN CLASS ----------------------------------]

/**

* map zoom demo for Guidebee Map API on MIDP platform.

*/

public class MapZoomMIDP extends MapDemoMIDP implements CommandListener{

private Command mapZoomInCommand=new Command("Zoom In",Command.OK,1);

private Command mapZoomOutCommand=new Command("Zoom Out",Command.CANCEL,1);

public void startApp() {

init();

canvas.addCommand(mapZoomInCommand);

canvas.addCommand(mapZoomOutCommand);

canvas.setCommandListener(this);

GeoLatLng center = new GeoLatLng(32.0616667, 118.7777778);

map.setCenter(center, 13, MapType.MICROSOFTCHINA);

Display.getDisplay(this).setCurrent(canvas);

}

public void commandAction(Command c, Displayable d) {

if(c==mapZoomInCommand){

map.zoomIn();

}else if(c==mapZoomOutCommand){

map.zoomOut();

}

}

}