一、问题描述

　　上一次我们使用百度地图实现基本的定位功能，接下来我们继续实现搜索和定位，并使用LocationOverlay绘制定位位置，同时展示如何使用自定义图标绘制并点击时弹出泡泡

　　如图所示：

 

二、编写MyApplication类

public class MyApplication extends Application {    private static MyApplication mInstance = null;    public boolean m_bKeyRight = true;    public BMapManager mBMapManager = null;    public static final String strKey = "申请的应用key";    @Override    public void onCreate() {        super.onCreate();        mInstance = this;        initEngineManager(this);    }    public void initEngineManager(Context context) {        if (mBMapManager == null) {            mBMapManager = new BMapManager(context);        }        if (!mBMapManager.init(strKey,new MyGeneralListener())) {     Toast.makeText(MyApplication.getInstance().getApplicationContext(), "BMapManager  初始化错误!", Toast.LENGTH_LONG).show();        }}        public static MyApplication getInstance() {        return mInstance;    }    // 常用事件监听，用来处理通常的网络错误，授权验证错误等    public static class MyGeneralListener implements MKGeneralListener {        @Override        public void onGetNetworkState(int iError) {            if (iError == MKEvent.ERROR_NETWORK_CONNECT) {     Toast.makeText(MyApplication.getInstance().getApplicationContext(), "您的网络出错啦！",Toast.LENGTH_LONG).show();            }else if (iError == MKEvent.ERROR_NETWORK_DATA) {             Toast.makeText(MyApplication.getInstance().getApplicationContext(), "输入正确的检索条件！",Toast.LENGTH_LONG).show();            }        }        @Override        public void onGetPermissionState(int iError) {            //非零值表示key验证未通过            if (iError != 0) {                //授权Key错误：    Toast.makeText(MyApplication.getInstance().getApplicationContext(),                         "请在 DemoApplication.java文件输入正确的授权Key,并检查您的网络连接是否正常！error: "+iError, Toast.LENGTH_LONG).show();                MyApplication.getInstance().m_bKeyRight = true;            }            else{                MyApplication.getInstance().m_bKeyRight = true;    //Toast.makeText(DemoApplication.getInstance().getApplicationContext(), "key认证成功", Toast.LENGTH_LONG).show();            }        }    }}

三、编写MyLocationMapView，继承MapView重写onTouchEvent实现泡泡处理操作

public class MyLocationMapView extends MapView {    public static PopupOverlay pop = null;// 弹出泡泡图层，点击图标使用    public MyLocationMapView(Context context) {        super(context);    }    public MyLocationMapView(Context context, AttributeSet attrs) {        super(context, attrs);    }    public MyLocationMapView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);    }    @Override    public boolean onTouchEvent(MotionEvent event) {        if (!super.onTouchEvent(event)) {            // 消隐泡泡            if (pop != null && event.getAction() == MotionEvent.ACTION_UP)                pop.hidePop();        }        return true;    }}

三、编写主程序MainActivity

　　编写主程序MainActivity，用来展示如何结合定位SDK实现定位，并使用MyLocation Overlay绘制定位位置 同时展示如何使用自定义图标绘制并点击时弹出泡泡。

public class MainActivity extends Activity {    private  EditText txtAddr;    // 定位相关    LocationClient mLocClient;    LocationData locData = null;    public MyLocationListenner myListener = new MyLocationListenner();    public MyApplication app;    //定位图层    locationOverlay myLocationOverlay = null;    //弹出泡泡图层    private PopupOverlay   pop  = null;//弹出泡泡图层，浏览节点时使用    private TextView  popupText = null;//泡泡view    private View viewCache = null;//地图相关，使用继承MapView的MyLocationMapView目的是重写touch事件实现泡泡处理    //如果不处理touch事件，则无需继承，直接使用MapView即可    public MyLocationMapView mMapView = null;    // 地图View    private MapController mMapController = null;    private MKSearch mMKSearch = null;//用于信息检索服务     //UI相关    OnCheckedChangeListener radioButtonListener = null;    TextView requestLocButton ,btSerach;    boolean isRequest = false;//是否手动触发请求定位    boolean isFirstLoc = true;//是否首次定位        @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        /**         * 使用地图sdk前需先初始化BMapManager.         * BMapManager是全局的，可为多个MapView共用，它需要地图模块创建前创建，         * 并在地图地图模块销毁后销毁，只要还有地图模块在使用，BMapManager就不应该销毁         */        app = (MyApplication)this.getApplication();        if (app.mBMapManager == null) {            app.mBMapManager = new BMapManager(getApplicationContext());            /**             * 如果BMapManager没有初始化则初始化BMapManager             */            app.mBMapManager.init(MyApplication.strKey,new MyApplication.MyGeneralListener());        }        setContentView(R.layout.activity_main);                   txtAddr=(EditText)findViewById(R.id.txtAddr);//关键字输入框                 //监听搜索单击事件           btSerach= (TextView)findViewById(R.id.btOk);        btSerach.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                mMKSearch.poiSearchInCity("", txtAddr.getText().toString());                                  }        });        //定位按钮        requestLocButton = (TextView)findViewById(R.id.btget);        requestLocButton.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                requestLocClick();            }        });                //地图初始化        mMapView = (MyLocationMapView)findViewById(R.id.bmapView);        mMapView.setTraffic(true);//设置地图模式为交通视图(也可为卫星视图)         mMapController = mMapView.getController();        mMapView.getController().setZoom(15);        mMapView.getController().enableClick(true);        mMapView.setBuiltInZoomControls(true);      //信息检索初始化        mMKSearch = new MKSearch();         mMKSearch.init(app.mBMapManager, new MKSearchListener() {            @Override            public void onGetAddrResult(MKAddrInfo arg0, int arg1) {            }            @Override            public void onGetBusDetailResult(MKBusLineResult arg0, int arg1) {            }            @Override            public void onGetDrivingRouteResult(MKDrivingRouteResult arg0,                    int arg1) {            }            @Override            public void onGetPoiDetailSearchResult(int arg0, int arg1) {            }            @Override            public void onGetPoiResult(MKPoiResult res, int type, int error) {                if (error == MKEvent.ERROR_RESULT_NOT_FOUND) {                    Toast.makeText(MainActivity.this, "抱歉，未找到结果",                            Toast.LENGTH_LONG).show();                    return;                } else if (error != 0 || res == null) {                    Toast.makeText(MainActivity.this, "搜索出错啦.."+error,                            Toast.LENGTH_LONG).show();                    return;                }                PoiOverlay poiOverlay = new PoiOverlay(MainActivity.this,                        mMapView);                poiOverlay.setData(res.getAllPoi());                mMapView.getOverlays().clear();                mMapView.getOverlays().add(poiOverlay);                mMapView.refresh();                for (MKPoiInfo info : res.getAllPoi()) {                    if (info.pt != null) {                        mMapView.getController().animateTo(info.pt);                        break;                    }                }            }            @Override            public void onGetShareUrlResult(MKShareUrlResult arg0, int arg1,                    int arg2) {            }            @Override            public void onGetSuggestionResult(MKSuggestionResult arg0, int arg1){            }            @Override            public void onGetTransitRouteResult(MKTransitRouteResult arg0,                    int arg1) {            }            @Override            public void onGetWalkingRouteResult(MKWalkingRouteResult arg0,                    int arg1) {            }        });        createPaopao();        //定位初始化        mLocClient = new LocationClient( this );        locData = new LocationData();        mLocClient.registerLocationListener( myListener );        LocationClientOption option = new LocationClientOption();        option.setOpenGps(true);//打开gps        option.setAddrType("all");//返回的定位结果包含地址信息        option.disableCache(false);//禁止启用缓存定位        option.setCoorType("bd09ll");     //设置坐标类型        option.setScanSpan(1000);        mLocClient.setLocOption(option);        mLocClient.start();               //定位图层初始化        myLocationOverlay = new locationOverlay(mMapView);        //设置定位数据        myLocationOverlay.setData(locData);        //添加定位图层        mMapView.getOverlays().add(myLocationOverlay);        myLocationOverlay.enableCompass();        //修改定位数据后刷新图层生效        mMapView.refresh();            }    /**     * 手动触发一次定位请求     */    public void requestLocClick(){        isRequest = true;        mLocClient.requestLocation();        Toast.makeText(MainActivity.this, "正在定位……", Toast.LENGTH_SHORT).show();    }    /**     * 创建弹出泡泡图层     */    public void createPaopao(){        viewCache = getLayoutInflater().inflate(R.layout.custom_text_view, null);        popupText =(TextView) viewCache.findViewById(R.id.textcache);        //泡泡点击响应回调        PopupClickListener popListener = new PopupClickListener(){            @Override            public void onClickedPopup(int index) {            }        };        pop = new PopupOverlay(mMapView,popListener);              MyLocationMapView.pop = pop;    }    /**     * 定位SDK监听函数     */    public class MyLocationListenner implements BDLocationListener {        @Override        public void onReceiveLocation(BDLocation location) {            if (location == null)                return ;            locData.latitude = location.getLatitude();            locData.longitude = location.getLongitude();            //如果不显示定位精度圈，将accuracy赋值为0即可            locData.accuracy = location.getRadius();            // 此处可以设置 locData的方向信息, 如果定位 SDK 未返回方向信息，用户可以自己实现罗盘功能添加方向信息。            locData.direction = location.getDerect();            //更新定位数据            myLocationOverlay.setData(locData);            //更新图层数据执行刷新后生效            mMapView.refresh();            //是手动触发请求或首次定位时，移动到定位点            if (isRequest || isFirstLoc){                //移动地图到定位点                //Log.d("LocationOverlay", "receive location, animate to it");                mMapController.animateTo(new GeoPoint((int)(locData.latitude* 1e6), (int)(locData.longitude *  1e6)));                isRequest = false;                myLocationOverlay.setLocationMode(LocationMode.FOLLOWING);            }            //首次定位完成            isFirstLoc = false;        }        public void onReceivePoi(BDLocation poiLocation) {            if (poiLocation == null){                return ;            }        }    }    //继承MyLocationOverlay重写dispatchTap实现点击处理      public class locationOverlay extends MyLocationOverlay{          public locationOverlay(MapView mapView) {              super(mapView);          }          @Override          protected boolean dispatchTap() {              //处理点击事件,弹出泡泡              popupText.setBackgroundResource(R.drawable.popup);              popupText.setText(mLocClient.getLastKnownLocation().getAddrStr());            pop.showPopup(BMapUtil.getBitmapFromView(popupText),new GeoPoint((int)(locData.latitude*1e6), (int)(locData.longitude*1e6)),8);            return true;          }                }    @Override    protected void onPause() {        mMapView.onPause();        if(app.mBMapManager!=null){              app.mBMapManager.stop();       }         super.onPause();    }        @Override    protected void onResume() {        mMapView.onResume();        if(app.mBMapManager!=null){              app.mBMapManager.start();      }        super.onResume();    }    @Override    protected void onDestroy() {        //退出时销毁定位        if (mLocClient != null)            mLocClient.stop();        mMapView.destroy();        if(app.mBMapManager!=null){              app.mBMapManager.destroy();              app.mBMapManager=null;      }          super.onDestroy();    }        @Override    protected void onSaveInstanceState(Bundle outState) {        super.onSaveInstanceState(outState);        mMapView.onSaveInstanceState(outState);        }    @Override    protected void onRestoreInstanceState(Bundle savedInstanceState) {        super.onRestoreInstanceState(savedInstanceState);        mMapView.onRestoreInstanceState(savedInstanceState);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        return true;    }}

MainActivity的布局文件如下：