android实现定位与目的地的导航示例代码

public class navigationdemoactivity extends mapactivity { 
  private string mmapkey = "注册自己的key"; 
  private edittext destinationedittext = null; 
  private button startnavibutton = null; 
  private mapview mapview = null; 
  private bmapmanager mmapmanager = null; 
  private mylocationoverlay mylocationoverlay = null; 
  //onresume时注册此listener，onpause时需要remove,注意此listener不是android自带的，是百度api中的 
  private locationlistener locationlistener; 
  private mksearch searchmodel; 
  geopoint pt; 

  @override 
  public void oncreate(bundle savedinstancestate) { 
    super.oncreate(savedinstancestate); 
    requestwindowfeature(window.feature_no_title); 
    setcontentview(r.layout.main); 
    destinationedittext = (edittext) this.findviewbyid(r.id.et_destination); 
    startnavibutton = (button) this.findviewbyid(r.id.btn_navi); 

    mmapmanager = new bmapmanager(getapplication()); 
    mmapmanager.init(mmapkey, new mygenerallistener()); 
    super.initmapactivity(mmapmanager); 

    mapview = (mapview) this.findviewbyid(r.id.bmapsview); 
    //设置启用内置的缩放控件 
    mapview.setbuiltinzoomcontrols(true);  
    //设置在缩放动画过程中也显示overlay,默认为不绘制 
//    mapview.setdrawoverlaywhenzooming(true); 
    //获取当前位置层 
    mylocationoverlay = new mylocationoverlay(this, mapview); 
    //将当前位置的层添加到地图底层中 
    mapview.getoverlays().add(mylocationoverlay); 

    // 注册定位事件 
    locationlistener = new locationlistener(){ 

      @override 
      public void onlocationchanged(location location) { 
        if (location != null){ 
          //生成geo类型坐标并在地图上定位到该坐标标示的地点 
           pt = new geopoint((int)(location.getlatitude()*1e6), 
              (int)(location.getlongitude()*1e6)); 
//         system.out.println("---"+location.getlatitude() +":"+location.getlongitude()); 
          mapview.getcontroller().animateto(pt); 
        } 
      } 
    }; 

    //初始化搜索模块 
    searchmodel = new mksearch(); 
    //设置路线策略为最短距离 
    searchmodel.setdrivingpolicy(mksearch.ecar_dis_first); 
    searchmodel.init(mmapmanager, new mksearchlistener() { 
      //获取驾车路线回调方法 
      @override 
      public void ongetdrivingrouteresult(mkdrivingrouteresult res, int error) { 
        // 错误号可参考mkevent中的定义 
        if (error != 0 || res == null) { 
          toast.maketext(navigationdemoactivity.this, "抱歉，未找到结果", toast.length_short).show(); 
          return; 
        } 
        routeoverlay routeoverlay = new routeoverlay(navigationdemoactivity.this, mapview); 

        // 此处仅展示一个方案作为示例 
        mkroute route = res.getplan(0).getroute(0); 
        int distancem = route.getdistance(); 
        string distancekm = string.valueof(distancem / 1000) +"."+string.valueof(distancem % 1000); 
        system.out.println("距离:"+distancekm+"公里---节点数量:"+route.getnumsteps()); 
        for (int i = 0; i < route.getnumsteps(); i++) { 
          mkstep step = route.getstep(i); 
          system.out.println("节点信息："+step.getcontent()); 
        } 
        routeoverlay.setdata(route); 
        mapview.getoverlays().clear(); 
        mapview.getoverlays().add(routeoverlay); 
        mapview.invalidate(); 
        mapview.getcontroller().animateto(res.getstart().pt); 
      } 

      //以下两种方式和上面的驾车方案实现方法一样 
      @override 
      public void ongetwalkingrouteresult(mkwalkingrouteresult res, int error) { 
        //获取步行路线 
      } 

      @override 
      public void ongettransitrouteresult(mktransitrouteresult arg0, int arg1) { 
        //获取公交线路 
      } 

      @override 
      public void ongetbusdetailresult(mkbuslineresult arg0, int arg1) { 
      } 
      @override 
      public void ongetaddrresult(mkaddrinfo arg0, int arg1) { 
      } 
      @override 
      public void ongetsuggestionresult(mksuggestionresult arg0, int arg1) { 
      } 
      @override 
      public void ongetpoiresult(mkpoiresult arg0, int arg1, int arg2) { 
      } 
    }); 

    startnavibutton.setonclicklistener(new onclicklistener() { 

      @override 
      public void onclick(view v) { 
        string destination = destinationedittext.gettext().tostring(); 

        //设置起始地（当前位置） 
        mkplannode startnode = new mkplannode(); 
        startnode.pt = pt; 
        //设置目的地 
        mkplannode endnode = new mkplannode();  
        endnode.name = destination; 

        //展开搜索的城市 
        string city = getresources().getstring(r.string.beijing); 
//       system.out.println("----"+city+"---"+destination+"---"+pt); 
        searchmodel.drivingsearch(city, startnode, city, endnode); 
        //步行路线 
//       searchmodel.walkingsearch(city, startnode, city, endnode); 
        //公交路线 
//       searchmodel.transitsearch(city, startnode, endnode); 
      } 
    }); 

  } 

  @override 
  protected void onresume() { 
    mmapmanager.getlocationmanager().requestlocationupdates(locationlistener); 
    mylocationoverlay.enablemylocation(); 
    mylocationoverlay.enablecompass(); // 打开指南针 
    mmapmanager.start(); 
    super.onresume(); 
  } 

  @override 
  protected void onpause() { 
    mmapmanager.getlocationmanager().removeupdates(locationlistener); 
    mylocationoverlay.disablemylocation();//显示当前位置 
    mylocationoverlay.disablecompass(); // 关闭指南针 
    mmapmanager.stop(); 
    super.onpause(); 
  } 

  @override 
  protected boolean isroutedisplayed() { 
    // todo auto-generated method stub 
    return false; 
  } 

  // 常用事件监听，用来处理通常的网络错误，授权验证错误等 
  class mygenerallistener implements mkgenerallistener { 
      @override 
      public void ongetnetworkstate(int ierror) { 
        log.d("mygenerallistener", "ongetnetworkstate error is "+ ierror); 
        toast.maketext(navigationdemoactivity.this, "您的网络出错啦！", 
            toast.length_long).show(); 
      } 

      @override 
      public void ongetpermissionstate(int ierror) { 
        log.d("mygenerallistener", "ongetpermissionstate error is "+ ierror); 
        if (ierror == mkevent.error_permission_denied) { 
          // 授权key错误： 
          toast.maketext(navigationdemoactivity.this,  
              "请在bmapapidemoapp.java文件输入正确的授权key！", 
              toast.length_long).show(); 
        } 
      } 
    } 
} 

<?xml version="1.0" encoding="utf-8"?> 
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" 
  android:orientation="vertical" > 

  <linearlayout 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:orientation="horizontal" > 

    <textview 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:textsize="18sp" 
      android:text="destination：" /> 

    <edittext 
      android:id="@+id/et_destination" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" /> 
  </linearlayout> 

  <button  
    android:id="@+id/btn_navi" 
    android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:text="start navigate"/> 

  <com.baidu.mapapi.mapview 
    android:id="@+id/bmapsview" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:clickable="true" /> 

</linearlayout> 

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
  package="com.ericssonlabs" 
  android:versioncode="1" 
  android:versionname="1.0" > 

  <uses-sdk android:minsdkversion="8" /> 

  <uses-permission android:name="android.permission.access_network_state"></uses-permission> 
  <uses-permission android:name="android.permission.access_fine_location"></uses-permission> 
  <uses-permission android:name="android.permission.internet"></uses-permission> 
  <uses-permission android:name="android.permission.write_external_storage"></uses-permission> 
  <uses-permission android:name="android.permission.access_wifi_state"></uses-permission>  
  <uses-permission android:name="android.permission.change_wifi_state"></uses-permission>  
  <uses-permission android:name="android.permission.read_phone_state"></uses-permission> 

  <supports-screens android:largescreens="true" 
    android:normalscreens="true" android:smallscreens="true" 
    android:resizeable="true" android:anydensity="true"/> 
  <uses-sdk android:minsdkversion="3"></uses-sdk> 

  <application 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" > 
    <activity 
      android:name=".navigationdemoactivity" 
      android:label="@string/app_name" > 
      <intent-filter> 
        <action android:name="android.intent.action.main" /> 

        <category android:name="android.intent.category.launcher" /> 
      </intent-filter> 
    </activity> 
  </application> 

</manifest>