百度地图之在一个地图上显示多条导航路线

package com.njupt.bmap_helloworld;

import com.baidu.mapapi.BMapManager;
import com.baidu.mapapi.GeoPoint;
import com.baidu.mapapi.MKAddrInfo;
import com.baidu.mapapi.MKBusLineResult;
import com.baidu.mapapi.MKDrivingRouteResult;
import com.baidu.mapapi.MKGeneralListener;
import com.baidu.mapapi.MKPlanNode;
import com.baidu.mapapi.MKPoiInfo;
import com.baidu.mapapi.MKPoiResult;
import com.baidu.mapapi.MKSearch;
import com.baidu.mapapi.MKSearchListener;
import com.baidu.mapapi.MKSuggestionResult;
import com.baidu.mapapi.MKTransitRouteResult;
import com.baidu.mapapi.MKWalkingRouteResult;
import com.baidu.mapapi.MapActivity;
import com.baidu.mapapi.MapController;
import com.baidu.mapapi.MapView;
import com.baidu.mapapi.PoiOverlay;
import com.baidu.mapapi.RouteOverlay;
import com.baidu.mapapi.TransitOverlay;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.Toast;

public class MainActivity extends MapActivity {

	private MapView mapView;//百度地图的相关控件
	private BMapManager bMapManager;//加载地图的引擎
	private String keyString = "04763B1D8C925195965E838C6E59DB767DAE4BA7";//百度地图的key
	private MapController mapController;//在百度地图上添加一些控件,比如放大或缩小控件
	
	private MKSearch mkSearch;
	private MKPlanNode start;
	private MKPlanNode end;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		
		mapView = (MapView) findViewById(R.id.bmapView);
		bMapManager = new BMapManager(MainActivity.this);
		
		//必须要加载key
		bMapManager.init(keyString, new MKGeneralListener() {
			
			@Override
			public void onGetPermissionState(int arg0) {
				if(arg0 == 300){
					Toast.makeText(MainActivity.this, "输入的key有误,请核实...", 1).show();
				}
			}
			
			@Override
			public void onGetNetworkState(int arg0) {
				// TODO Auto-generated method stub
				
			}
		});
		
		initMapActivity(bMapManager);
		mapView.setBuiltInZoomControls(true);//表示可以设置缩放功能
		mkSearch = new MKSearch();
		mkSearch.init(bMapManager, new MySearchListener());
		/**
		 * 根据中心点、半径与检索词发起周边检索
		 * 第一个是查询的名称,第二个参数是构建一个GeoPoint点,第三个参数是查询的半径
		 */
//		mkSearch.poiSearchNearBy("清华大学", new GeoPoint((int)(39.915*1E6), (int)(116.404*1E6)), 5000);
	    
		start = new MKPlanNode();
		start.pt = new GeoPoint((int)(39.915*1E6), (int)(116.404*1E6));
		
		end = new MKPlanNode();
		end.pt = new GeoPoint(40057031, 116307852);
		
		mkSearch.transitSearch("北京", start, end);
		
	}

	public class MySearchListener implements MKSearchListener{

		@Override
		public void onGetAddrResult(MKAddrInfo arg0, int arg1) {
			// TODO Auto-generated method stub
			
		}

		//获取公交线路的详情
		@Override
		public void onGetBusDetailResult(MKBusLineResult arg0, int arg1) {
			if(arg0 == null || arg1 != 0){
				Toast.makeText(MainActivity.this, "对不起,未找到结果!", 0).show();
				return ;
			}
			
			RouteOverlay routeOverlay = new RouteOverlay(MainActivity.this, mapView);
			routeOverlay.setData(arg0.getBusRoute());//获得公交线路图
			mapView.getOverlays().clear();//清楚公交站点的标识
			mapView.getOverlays().add(routeOverlay);
			mapView.invalidate();
			//以动画形式描述公交站点
			mapView.getController().animateTo(arg0.getBusRoute().getStart());
		}

		@Override
		public void onGetDrivingRouteResult(MKDrivingRouteResult arg0, int arg1) {
			// TODO Auto-generated method stub
			
		}

		//获取公交线路的UID，并根据此UID来发起公交线路详情的检索
		@Override
		public void onGetPoiResult(MKPoiResult result, int type, int iError) {
			if(result == null || iError != 0){
				return ;
			}
			
			//定义一个公交线路描述类
			MKPoiInfo mkPoiInfo = null;
			int totalPoiNum = result.getNumPois();//获取本地检索公交线路的总站点数
			for(int i = 0 ; i < totalPoiNum ; ++i){
				mkPoiInfo = result.getPoi(i);
				if(mkPoiInfo.ePoiType == 2){//如果该站点是公交站点
					break;
				}
			}
			
			mkSearch.busLineSearch("北京", mkPoiInfo.uid);
		}

		@Override
		public void onGetSuggestionResult(MKSuggestionResult arg0, int arg1) {
			// TODO Auto-generated method stub
			
		}

		@Override
		public void onGetTransitRouteResult(MKTransitRouteResult arg0, int arg1) {
			if(arg0 == null){
				return;
			}
			
			int planNum = arg0.getNumPlan();
			for(int i = 0 ; i < planNum ; ++i){//获得所有的驾车路线图
				TransitOverlay overlay = new TransitOverlay(MainActivity.this, mapView);
				overlay.setData(arg0.getPlan(i));
				mapView.getOverlays().add(overlay);
			}
			mapView.invalidate();//刷新地图数据
			mapView.getController().animateTo(arg0.getStart().pt);
		}

		@Override
		public void onGetWalkingRouteResult(MKWalkingRouteResult arg0, int arg1) {
			// TODO Auto-generated method stub
			
		}
		
	}
	@Override
	protected void onDestroy() {
		super.onDestroy();
		
		if(bMapManager != null){
			bMapManager.destroy();
			bMapManager = null;
		}
	}
	
	@Override
	protected void onResume() {
		super.onResume();
		
		if(bMapManager != null){
			bMapManager.start();
		}
	}
	
	@Override
	protected void onPause() {
		super.onPause();
		
		if(bMapManager != null){
			bMapManager.stop();
		}
	}
	@Override
	protected boolean isRouteDisplayed() {
		// TODO Auto-generated method stub
		return false;
	}
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}