通过 ANE(Adobe Native Extension) 启动Andriod服务 推送消息(二)

装载:http://www.cnblogs.com/bobolive/p/3202038.html

着手改造之前，有兴趣可以阅读下官方文档：http://help.adobe.com/zh_CN/air/extensions/index.html

新建工程 NavService 并创建包 nav.wenbo.service, 这些都可以自定义，但要记住你的包名。



注意最下方那个jar包，这个是必需的，打开项目的构建目录(buildPath)，引用外部jar包, 目录在你在Flex sdk目录下

%FlexSDK%\4.x.x\lib\android\FlashRuntimeExtensions.jar

我的本地目录是:F:\Program Files\Adobe\Adobe Flash Builder 4.7\sdks\4.6.0\lib\android\FlashRuntimeExtensions.jar

首先创建air调用的入口类 ServiceExtension 这个类必需在ane包里面的extension.xml里指定（后面会介绍）

package nav.wenbo.service;

import android.content.Context;
import android.content.Intent;
import android.util.Log;

import com.adobe.fre.FREContext;
import com.adobe.fre.FREExtension;

public class ServiceExtension implements FREExtension {
public static final String TAG = "ServiceExtension";
public static Context appContext;
public static FREContext extensionContext;
public static String Msg = "none";

@Override
public FREContext createContext(String contextType) {
// TODO Auto-generated method stub
return new ServiceExtensionContext();
}

@Override
public void dispose() {
// TODO Auto-generated method stub
Log.d(TAG, "Extension disposed.");
}

@Override
public void initialize() {
// TODO Auto-generated method stub
Log.d(TAG, "Extension initialized.");
}

}

ServiceExtension中关键是 createContext 方法，这个方法返回一个可连通air及本地Java代码的上下文。并在该上下文中定义可供air调用的方法。

下面是ServiceExtensionContext类

package nav.wenbo.service;

import java.util.HashMap;
import java.util.Map;

import nav.wenbo.service.functions.InitFunction;
import nav.wenbo.service.functions.SendFunction;
import nav.wenbo.service.functions.StartFunction;

import android.util.Log;

import com.adobe.fre.FREContext;
import com.adobe.fre.FREFunction;

public class ServiceExtensionContext extends FREContext {
public static final String TAG = "ServiceExtensionContext";
@Override
public void dispose() {
// TODO Auto-generated method stub
Log.d(TAG,"Context disposed.");
}

@Override
public Map<String, FREFunction> getFunctions() {
Map<String, FREFunction> functions = new HashMap<String, FREFunction>();
functions.put("init", new InitFunction());
functions.put("service", new StartFunction());
functions.put("send", new SendFunction());

return functions;
}

}

functions.put相当注册调用逻辑的调用名， 这里把你所有调用方法都填上。init 用于初始化上下文，service用来启动和关闭服务, send用于发送消息。 在编写对应方法之前，

先把上一节的Backgroundservice 移植过来

package nav.wenbo.service;

import com.wenbo.navservice.R;

import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.util.Log;

public class NotificationService extends Service {
private NotificationManager notificationMgr;
private Thread mthr;
private int mCount=0;
private Boolean mSend=true;

@Override
public void onCreate() {
super.onCreate();
notificationMgr = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
displayNotificationMessage("starting Background Service");

if(mthr == null || mSend == false)
{
mSend=true;
mthr = new Thread(null, new ServiceWorker(), "BackgroundSercie");
mthr.start();
}
if(null != ServiceExtension.extensionContext) ServiceExtension.extensionContext.dispatchStatusEventAsync("start", "1");
}

@Override
public void onDestroy()
{
super.onDestroy();
mSend = false;
}

@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}

class ServiceWorker implements Runnable {
@Override
public void run() {
// do background processing here.....
// stop the service when done...
// BackgroundService.this.stopSelf()
while(mSend)
{
try{
Thread.sleep(1000);
Log.d("", "runnable" + mCount);
displayNotificationMessage(ServiceExtension.Msg);
}
catch (InterruptedException e)
{
e.printStackTrace();
}
}
}
}

private void displayNotificationMessage(String message) {
if(message == "none") return;

Log.d("", message);
mCount++;
Notification notification = new Notification(R.drawable.ic_launcher, message,
System.currentTimeMillis());

PendingIntent contentIntent = PendingIntent.getActivity(this, 0, new Intent(this, Activity.class), 0);

notification.setLatestEventInfo(this, "女神之贱", message, contentIntent);

notificationMgr.notify(1000, notification);
}
}

这里改动很小，发送的消息从ServiceExtension类里面取，当message != none时显示该通知，另ServiceExtension.extensionContext.dispatchStatusEventAsync 是用来给air程序发消息， 在air中监听StatusEvent.STATUS 可以捕获这条消息并获取对应参数。在这里用处是通知服务启动成功。

下面就剩下实际调用的方法了。

首先是初始化上下文，这里主要是ServiceExtension.extensionContext 主要用于往air发消息。

package nav.wenbo.service.functions;

import nav.wenbo.service.ServiceExtension;

import android.content.Context;
import android.util.Log;

import com.adobe.fre.FREContext;
import com.adobe.fre.FREFunction;
import com.adobe.fre.FREObject;

public class InitFunction implements FREFunction {
public static final String TAG = "InitFunction";
@Override
public FREObject call(FREContext context, FREObject[] args) {
ServiceExtension.extensionContext = context;

Context appContext = context.getActivity().getApplicationContext();
ServiceExtension.appContext = appContext;

Log.i(TAG, "in init");

return null;
}

}

这里注意了，因为我们没有独立的Android入口文件，我们 只能从 FREContext.getActivity() 来取得我们所需的上下文，并用这上下文启动我们的服务，这是跟前一节例子最大不同的地方。

执行后通知air：context.dispatchStatusEventAsync("start", "2");

package nav.wenbo.service.functions;

import nav.wenbo.service.NotificationService;
import android.content.Context;
import android.content.Intent;

import com.adobe.fre.FREContext;
import com.adobe.fre.FREFunction;
import com.adobe.fre.FREObject;

public class StartFunction implements FREFunction {

@Override
public FREObject call(FREContext context, FREObject[] args) {
Context appContext = context.getActivity().getApplicationContext();
Boolean isStart=true;
try {
isStart = args[0].getAsBool();
} catch (Exception e) {

}
if(isStart) context.getActivity().startService(new Intent(appContext, NotificationService.class));
else context.getActivity().stopService(new Intent(appContext, NotificationService.class));

context.dispatchStatusEventAsync("start", "2");
return null;
}

}

最后这个最简单，仅仅设置下所要推送的消息.

package nav.wenbo.service.functions;

import nav.wenbo.service.ServiceExtension;

import com.adobe.fre.FREContext;
import com.adobe.fre.FREFunction;
import com.adobe.fre.FREObject;

public class SendFunction implements FREFunction {

@Override
public FREObject call(FREContext context, FREObject[] args) {
// TODO Auto-generated method stub
String msg="none";
try
{
msg = args[0].getAsString();
}
catch(Exception e)
{

}
ServiceExtension.Msg = msg;
return null;
}

}

做完这些，并设置好权限后，把项目导出jar包, 命名为 libAndroidServiceLib.jar

下一节我将介绍air中跟此jar包对接。