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;

@Override
public void onCreate() {
Debugger.debug("GetLocation Service onCreate().");
init();
super.onCreate();
}

@Override
public void onDestroy() {
Debugger.debug("GetLocation Service onDestroy().");
if (mapManager != null) {
mapManager.destroy();
mapManager = null;
}
super.onDestroy();
}

@Override
public void onRebind(Intent intent) {
Debugger.debug("GetLocation Service onRebind().");
super.onRebind(intent);
}

@Override
public void onStart(Intent intent, int startId) {
Debugger.debug("GetLocation Service onStart().");
if (mapManager != null) {
mapManager.getLocationManager().requestLocationUpdates(locationListener);
mapManager.start();
}
super.onStart(intent, startId);
}

@Override
public boolean onUnbind(Intent intent) {
Debugger.debug("GetLocation Service onUnbind().");
return super.onUnbind(intent);
}

@Override
public 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MapActivity
mapManager = new BMapManager(getApplication());
// init方法的第一个参数需填入申请的API Key
mapManager.init("285B415EBAB2A92293E85502150ADA7F03C777C4", null);
mapManager.start();

locationListener = new LocationListener() {

@Override
public void onLocationChanged(Location location) {
try {
callBack.performAction(location.getLatitude(), location.getLongitude());
} catch (RemoteException e) {
e.printStackTrace();
}
}
};
}

private final ForGetLocationService.Stub mBinder = new ForGetLocationService.Stub() {

@Override
public void registCallback(ForMainActivity forMainActivity)
throws RemoteException {
Debugger.debug("callback 赋值");
callBack = forMainActivity;
}
};
}

3、Activity

private ForMainActivity.Stub callBack = new ForMainActivity.Stub() {

@Override
public 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() {

@Override
public void onServiceDisconnected(ComponentName name) {
Debugger.debug("MainActivity onServiceDisconnected.");
forGetLocationService = null;
}

@Override
public 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>