AIDL学习笔记2之从Service获取地理位置

这个程序用到了百度地图的API，所以需要导入相应的包。下载地址：http://download.csdn.net/detail/qiaoning13256/3940259

之所以用百度地图API，是因为过google 的不怎么稳定，经测试，百度地图api还是比较稳定的。

怎么导网上有很多例子。

1、AIDL文件

ForMainActivity

package com.android.aidl;interface ForMainActivity{void performAction(double latitude, double longitude);}

ForGetLocationService

package com.android.aidl;import com.android.aidl.ForMainActivity;interface ForGetLocationService{void registCallback(ForMainActivity forMainActivity);}

2、Service

package com.android.service;import com.baidu.mapapi.BMapManager;import com.baidu.mapapi.LocationListener;import com.android.aidl.ForGetLocationService;import com.android.aidl.ForMainActivity;import com.android.util.Debugger;import android.app.Service;import android.content.Intent;import android.location.Location;import android.os.IBinder;import android.os.RemoteException;public class GetLocationService extends Service{private ForMainActivity callBack;private LocationListener locationListener = null;private BMapManager mapManager;@Overridepublic void onCreate() {Debugger.debug("GetLocation Service onCreate().");init();super.onCreate();}@Overridepublic void onDestroy() {Debugger.debug("GetLocation Service onDestroy().");if (mapManager != null) {mapManager.destroy();mapManager = null;}super.onDestroy();}@Overridepublic void onRebind(Intent intent) {Debugger.debug("GetLocation Service onRebind().");super.onRebind(intent);}@Overridepublic void onStart(Intent intent, int startId) {Debugger.debug("GetLocation Service onStart().");if (mapManager != null) {mapManager.getLocationManager().requestLocationUpdates(locationListener);mapManager.start();}super.onStart(intent, startId);}@Overridepublic boolean onUnbind(Intent intent) {Debugger.debug("GetLocation Service onUnbind().");return super.onUnbind(intent);}@Overridepublic IBinder onBind(Intent intent) {Debugger.debug("GetLocation Service onBind().");if (mapManager != null) {mapManager.getLocationManager().requestLocationUpdates(locationListener);mapManager.start();}return mBinder;}private void init(){// 初始化MapActivitymapManager = new BMapManager(getApplication());// init方法的第一个参数需填入申请的API KeymapManager.init("285B415EBAB2A92293E85502150ADA7F03C777C4", null);mapManager.start();locationListener = new LocationListener() {@Overridepublic void onLocationChanged(Location location) {try {callBack.performAction(location.getLatitude(), location.getLongitude());} catch (RemoteException e) {e.printStackTrace();}}};}private final ForGetLocationService.Stub mBinder = new ForGetLocationService.Stub() {@Overridepublic void registCallback(ForMainActivity forMainActivity)throws RemoteException {Debugger.debug("callback 赋值");callBack = forMainActivity;}};}

3、Activity

private ForMainActivity.Stub callBack = new ForMainActivity.Stub() {@Overridepublic void performAction(double latitude, double longitude)throws RemoteException {Debugger.debug("MainActivity callBack performAction excuted.");Debugger.debug("From service::latitude -> " + latitude + "," + "longitude -> " + longitude);

//这儿用Handler将得到的信息送出，这儿不能进行UI操作Bundle bundle = new Bundle();bundle.putDouble(LATITUDE, latitude);bundle.putDouble(LONGITUDE, longitude);Message message = new Message();message.what = MSG_LOCATION_GOT;message.setData(bundle);handler.sendMessage(message);}};ForGetLocationService forGetLocationService;private ServiceConnection connection = new ServiceConnection() {@Overridepublic void onServiceDisconnected(ComponentName name) {Debugger.debug("MainActivity onServiceDisconnected.");forGetLocationService = null;}@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {Debugger.debug("MainActivity onServiceConnected.");forGetLocationService = ForGetLocationService.Stub.asInterface(service);try {forGetLocationService.registCallback(callBack);} catch (RemoteException e) {e.printStackTrace();}}};

在onCreate（）函数加上下边的代码：

Bundle bundle = new Bundle();Intent intent = new Intent(MainActivity.this, GetLocationService.class);intent.putExtras(bundle);bindService(intent, connection, Context.BIND_AUTO_CREATE);startService(intent);

4、Manifest文件

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.android"    android:versionCode="1"    android:versionName="@string/version_name" >    <uses-sdk android:minSdkVersion="7" />    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    <uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>  <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>    <application        android:icon="@drawable/qq"        android:label="@string/app_name" >        <activity            android:configChanges="orientation|keyboardHidden|navigation"            android:label="@string/app_name"            android:name=".activities.MainActivity"            android:screenOrientation="portrait"            android:theme="@android:style/Theme.Light" >        </activity>             <service android:name=".service.GetLocationService" android:process=":remote"></service>    </application></manifest>