百度地圖之一百度地圖搭建開發環境

初學者,這兩天照着老羅的百度地圖實踐了一下,小結一下,期待各學習者一塊兒交流!(事先聲明,全部代碼來自老羅視頻...)

地圖是經常使用的功能:

(1)基本搭建:

1.下載百度API,將其放在lib中,並添加path,申請Key,添加權限.

2.用bmapManager,MKSearch,mapView,搭建基本環境.代碼以下:

[代碼]java代碼：

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package chufan.mybaidumap;   import android.os.Bundle; import android.widget.Toast;   import com.baidu.mapapi.BMapManager; import com.baidu.mapapi.MKGeneralListener; import com.baidu.mapapi.MapActivity; import com.baidu.mapapi.MapController; import com.baidu.mapapi.MapView;   public class BaiduMapActivity extends MapActivity {     private MapView mapView;     private BMapManager bMapManager;//加載地圖引擎     //百度地圖的key     private String keyString="7F16C0415EB0C02A070F5EF58B905418EB5A82CE";     //在百度地圖上添加一些控件,好比放大縮小     private MapController mapController;     @Override     protected void onCreate(Bundle savedInstanceState) {         // TODO Auto-generated method stub         super.onCreate(savedInstanceState);         setContentView(R.layout.main);         mapView=(MapView)findViewById(R.id.bmapView);         bMapManager=newBMapManager(BaiduMapActivity.this);         bMapManager.init(keyString,newMKGeneralListener() {                           public void onGetPermissionState(int arg0) {                 // TODO Auto-generated method stub                 if(arg0==300){                     Toast.makeText(BaiduMapActivity.this,"輸入的Key有錯請覈實!!", 1).show();                 }             }                           public void onGetNetworkState(int arg0) {                 // TODO Auto-generated method stub                               }         });         initMapActivity(bMapManager);         mapView.setBuiltInZoomControls(true);//表示能夠設置縮放功能         mapController=mapView.getController();         mapController.setZoom(12);         //須要定義一個經續度:               }           @Override     protected void onDestroy() {         // TODO Auto-generated method stub         super.onDestroy();         if(bMapManager!=null){             bMapManager.destroy();             bMapManager=null;         }     }     @Override     protected void onResume() {         // TODO Auto-generated method stub         super.onResume();         if(bMapManager!=null){             bMapManager.start();         }     }     @Override     protected void onPause() {         // TODO Auto-generated method stub         super.onPause();         if(bMapManager!=null){             bMapManager.stop();         }     }     @Override     protected boolean isRouteDisplayed() {         // TODO Auto-generated method stub         returnfalse;     } }

(2)用文字方式顯示某個建築物:地圖裏全部顯示都由一層鋪在其表面的圖層來完成,即overlay,若是要由想特地標誌某地址,則須要本身先去"畫出"一個圖層.代碼以下:

[代碼]java代碼：

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1	mapView.getOverlays().add(newMyOverlay()); //調用新建的圖層

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public class MyOverlay extends Overlay{  //構建在地圖上的一個點             private GeoPoint geoPoint=newGeoPoint((int)(39.915*1E6),(int)(116.404*1E6));      //聲明一上畫筆的工具      private Paint paint=newPaint();      public void draw(Canvas arg0, MapView arg1, boolean arg2) {          // TODO Auto-generated method stub          super.draw(arg0, arg1, arg2);          Point point =mapView.getProjection().toPixels(geoPoint,null);          arg0.drawText("*這裏天安門", point.x, point.y, paint);      }  }

(3)同時標示多個地點,一樣原理,只是此次用到的是圖層中的數組,ItemizedOverlay,還有點擊事件OnTap.

[代碼]java代碼：

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public class MyOverlayItem extends ItemizedOverlay<OverlayItem>{         private List<OverlayItem> list=newArrayList<OverlayItem>();                   private double mLat1=39.90923;//表示緯度         private double mLon1=116.397428;//表示經度           private double mLat2=39.90922;//表示緯度         private double mLon2=116.311128;//表示經度                   private double mLat3=39.917723;//表示緯度         private double mLon3=116.371128;//表示經度            public MyOverlayItem(Drawable drawable) {             super(drawable);             GeoPoint geoPoint1=newGeoPoint((int)(mLat1*1E6),(int)(mLon1*1E6));             GeoPoint geoPoint2=newGeoPoint((int)(mLat2*1E6),(int)(mLon2*1E6));             GeoPoint geoPoint3=newGeoPoint((int)(mLat3*1E6),(int)(mLon3*1E6));             list.add(newOverlayItem(geoPoint1,"Point1","Point1"));             list.add(newOverlayItem(geoPoint2,"Point2","Point2"));             list.add(newOverlayItem(geoPoint3,"Point3","Point3"));             populate();//須要調用地圖刷新功能         } @Override protected boolean onTap(int i) {     // TODO Auto-generated method stub     Toast.makeText(BaiduMapActivity.this,list.get(i).getSnippet(), 1).show();     returntrue; }         @Override         protected OverlayItem createItem(int arg0) {             // TODO Auto-generated method stub             returnlist.get(arg0);         }           @Override         public int size() {             // TODO Auto-generated method stub             returnlist.size();         }     }

(4)接着就是咱們本身用百度地圖的時候常常用到的,查找,路線,公交,人行等,這都是MKSearch完成.

[代碼]java代碼：

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1	mkSearch=newMKSearch();//生成對象

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1	mkSearch.init(bMapManager,newMySearchListener());//MySearchListener重要,全部動做都由它回調

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1	mkSearch.poiSearchNearBy("kfc",newGeoPoint((int)(39.915*1E6),(int)(116.404*1E6)),5000);

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<span class="Apple-tab-span">           </span>if(result==null){                 return;//判斷是否回調             }             PoiOverlay poiOverlay=newPoiOverlay(BaiduMapActivity.this, mapView);//生成圖層             poiOverlay.setData(result.getAllPoi());//給圖層畫上數據             mapView.getOverlays().add(poiOverlay);//顯示圖層             //刷新             mapView.invalidate();         }

根據範圍和檢索詞發起範圍檢索:poiSearchNearBy---->onGetPoiResult---->PoiOverlay

駕車路線搜索:drivingSearch---->onGetDrivingRouteResult---->RouteOverlay

標註行走路線搜索:walkingSearch---->onGetWalkingRouteResult--->RouteOverlay

公交換乘路線搜索:transitSearch---->onGetTransitRouteResult--->TransitOverlay   (能夠顯示多條路線,在老羅視頻教程第九課)

查詢某一路公交路線詳情搜索:poiSearchInCity--->onGetPoiResult---->mkSearch.busLineSearch----->RouteOverlay (這個稍微曲折了少量,由於要找bus路線要UID,而UID只經過"文字"-->"地圖信息"就須要poiSearch,PoiSearch的結果都在onGetPoiResult裏回調)

小結一下:PoiSearch是由"文字"---->地址或者路線

               其它即點到點,須要兩個MKPlanNode.

(5)老羅的第十節課,被坑了,一直在琢磨爲何會回調onGetPoiResult裏的代碼,壓根兒就沒有執行...代碼刪了也照樣獲得相同結果.也多是水平未夠,求解惑.

若是是沒調用到onGetPoiResult的話,就和前面的差很少:

詳細地址與GeoPoint的轉換:geocode/reverseGeocode--->onGetAddrResult--->ItemizedOverlay  而後將這個點的經緯格式化後顯示出來.

這樣問題又來了,若是隻是輸入地址而後給出Geopoint的點,poiSearch也一樣能夠作到,爲何要畫蛇添足用geocode?

觀察下兩個函數所獲得的數據:

poiSearch:(MKPoiInfo)

geocode:(MKAddrInfo)

 

geocode只有一個點的數據,poiSearch是一組數據.因此暫時結論爲:geocode屬於精確地址與點的轉換,poiSearch屬於模糊尋找,有一大堆結果.

 

總結:

1.運行問題,若是懷疑是標點,能夠看warn告警.

2.animateTo  看不到效果??刪掉同樣效果

3.super(boundCenterBottom(mark));

drawable.setBounds()

這兩句什麼做用,求回答.