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三、编写MyApplication类
编写MyApplication类，为了使用方便我们可以将实现定位的方法封装的Application组件中
封装下列方法
1、  获取定位信息——requestLocationInfo（）
2、  通过广播发送位置信息——sendBroadCast（）
3、  停止定位——stopLocationClient（）

public class MyApplication extends Application{public LocationClient mLocationClient = null;public GeofenceClient mGeofenceClient;public MyLocationListenner myListener = new MyLocationListenner（）;public static String TAG = "MyApplication";private static MyApplication mInstance = null;@Overridepublic void onCreate（）{mInstance = this;mLocationClient = new LocationClient（this）;/** * 项目的key，自己到官网申请 http://lbsyun.baidu.com/apiconsole/key */mLocationClient.setAK（"你的应用Key"）;mLocationClient.registerLocationListener（myListener）;mGeofenceClient = new GeofenceClient（this）;super.onCreate（）;Log.d（TAG, "... Application onCreate... pid=" + Process.myPid（））;}public static MyApplication getInstance（）{return mInstance;}/** * 停止定位 */public void stopLocationClient（）{if （mLocationClient ！= null && mLocationClient.isStarted（））{mLocationClient.stop（）;} }/** * 发起定位 */public void requestLocationInfo（）{setLocationOption（）;if （mLocationClient ！= null && ！mLocationClient.isStarted（））{mLocationClient.start（）;}if （mLocationClient ！= null && mLocationClient.isStarted（））{mLocationClient.requestLocation（）;} }/** * 设置百度地图的相关参数 */private void setLocationOption（）{LocationClientOption option = new LocationClientOption（）;option.setOpenGps（true）; // 打开gpsoption.setCoorType（"bd09ll"）; // 设置坐标类型option.setServiceName（"com.baidu.location.service_v2.9"）;option.setPoiExtraInfo（true）;option.setAddrType（"all"）;option.setPoiNumber（10）;option.disableCache（true）;mLocationClient.setLocOption（option）;}/** * 监听函数，有更新位置的时候，格式化成字符串，输出到屏幕中 */public class MyLocationListenner implements BDLocationListener{@Overridepublic void onReceiveLocation（BDLocation location）{if （location == null）{sendBroadCast（"定位失败！"）;return;}sendBroadCast（location.getAddrStr（））;}public void onReceivePoi（BDLocation poiLocation）{if （poiLocation == null）{sendBroadCast（"定位失败！"）;return;}sendBroadCast（poiLocation.getAddrStr（））;}}/** * 得到发送广播 * @param address */public void sendBroadCast（String address）{stopLocationClient（）;Intent intent = new Intent（MainActivity.LOCATION_BCR）;intent.putExtra（"address", address）;sendBroadcast（intent）;}}

public class MainActivity extends Activity{public static String TAG = "LocTestDemo";private BroadcastReceiver broadcastReceiver;public static String LOCATION_BCR = "location_bcr";private Button locBtn;private TextView locInfo;private MyApplication application;@Overrideprotected void onCreate（Bundle savedInstanceState）{super.onCreate（savedInstanceState）;setContentView（R.layout.activity_main）;application=（MyApplication）super.getApplication（）;initialize（）;initializeViews（）;initializeListeners（）;}private void initialize（）{registerBroadCastReceiver（）;//注册广播}private void initializeViews（）{locBtn = （Button） findViewById（R.id.location）;locInfo = （TextView） findViewById（R.id.location_info）;}private void initializeListeners（）{locBtn.setOnClickListener（new OnClickListener（）{@Overridepublic void onClick（View v）{locInfo.setText（"定位中..."）;//调用请求定位信息application.requestLocationInfo（）;}}）;}/** * 注册一个广播，监听定位结果，接受广播获得地址信息 */private void registerBroadCastReceiver（）{broadcastReceiver = new BroadcastReceiver（）{public void onReceive（Context context, Intent intent）{String address = intent.getStringExtra（"address"）;locInfo.setText（address）;}};IntentFilter intentToReceiveFilter = new IntentFilter（）;intentToReceiveFilter.addAction（LOCATION_BCR）;registerReceiver（broadcastReceiver, intentToReceiveFilter）;}@Overrideprotected void onDestroy（）{super.onDestroy（）;unregisterReceiver（broadcastReceiver）;}}

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.jereh.baidulocation"android:versionCode="1"android:versionName="1.0" ><uses-sdkandroid:minSdkVersion="8"android:targetSdkVersion="17" /><applicationandroid:name="com.jereh.baidulocation.MyApplication"android:allowBackup="true"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@style/AppTheme" ><activityandroid:name="com.jereh.baidulocation.MainActivity"android:label="@string/app_name" ><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><serviceandroid:name="com.baidu.location.f"android:enabled="true"android:process=":remote" ><intent-filter><action android:name="com.baidu.location.service_v2.2" ></action></intent-filter></service></application><uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" ></uses-permission><uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" ></uses-permission><uses-permission android:name="android.permission.ACCESS_WIFI_STATE" ></uses-permission><uses-permission android:name="android.permission.ACCESS_NETWORK_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><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" ></uses-permission><uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" ></uses-permission><uses-permission android:name="android.permission.READ_LOGS" ></uses-permission><uses-permission android:name="android.permission.VIBRATE" /><uses-permission android:name="android.permission.WAKE_LOCK" /><uses-permission android:name="android.permission.WRITE_SETTINGS" /></manifest>