C2DM接收器的使用registerReceiver动态寄存器 [英] Dynamic register of C2DM receiver using registerReceiver

问题描述

我可以成功地使用我的注册与C2DM的Andr​​oid应用程序中的＆LT;接收器＆GT; 在我的清单。不过，如果我删除＆LT;接收器＆GT; 从清单和使用上下文的方法registerReceiver登记自己的接收器，我收到了 SERVICE_NOT_AVAILABLE 错误响应。我在模拟器和真实设备复制这种行为。

时的动态注册一个C2DM接收器可能吗？

这是我删除清单的片段：

 ＆LT;接收机器人：service.C2DM.C2DMReceiver名称=机器人：权限=com.google.android.c2dm.permission.SEND＆GT;
  ＆LT;意向滤光器＆gt;
      ＆lt;作用机器人：名称=com.google.android.c2dm.intent.RECEIVE/＆GT;
      ＆LT;类机器人：名称=mytestapp/＆GT;
  ＆所述; /意图滤光器＆gt;
  ＆LT;意向滤光器＆gt;
      ＆lt;作用机器人：名称=com.google.android.c2dm.intent.REGISTRATION/＆GT;
      ＆LT;类机器人：名称=mytestapp/＆GT;
  ＆所述; /意图滤光器＆gt;
＆LT; /接收器＆GT;
 

这里是code：

 公共类C2DMReceiver扩展的BroadcastReceiver {

    @覆盖
    公共无效的onReceive（上下文的背景下，意图意图）{
        字符串登记= intent.getStringExtra（registration_id）;
        如果（intent.getStringExtra（错误）！= NULL）{
            // TODO：注册失败，应稍后再试。
            Log.e（MyTestAppC2DM，C2DM错误=+ intent.getStringExtra（错误））;
        }否则，如果（intent.getStringExtra（未登记）！= NULL）{
            Log.d（MyTestAppC2DM，未注册C2DM）;
        }否则，如果（注册！= NULL）{
            Log.d（MyTestAppC2DM，C2DM registration_id =+登记）;
        } 其他 {
            Log.w（MyTestAppC2DM，C2DM否registration_id）;
        }
    }

    公共静态无效寄存器（上下文的背景下）{
        / * BEGIN动态寄存器* /
        C2DMReceiver c2dmReceiver =新C2DMReceiver（）;

        IntentFilter的receiveIntentFilter =新的IntentFilter（）;
        receiveIntentFilter.addAction（com.google.android.c2dm.intent.RECEIVE）;
        receiveIntentFilter.addCategory（mytestapp）;
        context.registerReceiver（c2dmReceiver，receiveIntentFilter，com.google.android.c2dm.permission.SEND，NULL）;

        IntentFilter的registrationIntentFilter =新的IntentFilter（）;
        registrationIntentFilter.addAction（com.google.android.c2dm.intent.REGISTRATION）;
        registrationIntentFilter.addCategory（mytestapp）;
        context.registerReceiver（c2dmReceiver，registrationIntentFilter，com.google.android.c2dm.permission.SEND，NULL）;

        / * END动态寄存器* /

        意图registrationIntent =新的意向书（com.google.android.c2dm.intent.REGISTER）;
        registrationIntent.putExtra（应用程序，PendingIntent.getBroadcast（上下文，0，新意图（），0））;
        registrationIntent.putExtra（发件人，[e-mail]）;
        组件名服务= context.startService（registrationIntent）;
        如果（服务！= NULL）{
            Log.d（MyTestAppC2DM，C2DM登记发送）;
        }其他{
            Log.d（MyTestAppC2DM，C2DM服务没有找到）;
        }
    }
}
 

解决方案

在一个广播系统发送的，将启动应用程序来处理这个意图，如果他们有在清单中声明的​​匹配意图过滤器。由于C2DM的性质，它是没有用的具有动态安装的广播接收器，因为接收到C2DM消息时您的应用程序可能无法运行。如果它不运行它不会被启动了动态安装接收器。

I can register my android app with C2DM successfully using a <receiver> in my manifest. However, if I delete the <receiver> from the manifest and register my receiver using the method registerReceiver of the context, I receive a SERVICE_NOT_AVAILABLE error response. I have reproduced this behaviour in the emulator and in a real device.

Is dynamically registering a C2DM receiver possible?

This is the fragment of the manifest I deleted:

<receiver android:name=".service.C2DM.C2DMReceiver" android:permission="com.google.android.c2dm.permission.SEND">
  <intent-filter>
      <action android:name="com.google.android.c2dm.intent.RECEIVE" />
      <category android:name="mytestapp" />
  </intent-filter>
  <intent-filter>
      <action android:name="com.google.android.c2dm.intent.REGISTRATION" />
      <category android:name="mytestapp" />
  </intent-filter>
</receiver>

And here is the code:

public class C2DMReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String registration = intent.getStringExtra("registration_id");
        if (intent.getStringExtra("error") != null) {
            //TODO: Registration failed, should try again later.
            Log.e("MyTestAppC2DM", "C2DM Error = " + intent.getStringExtra("error"));
        } else if (intent.getStringExtra("unregistered") != null) {
            Log.d("MyTestAppC2DM", "C2DM Unregistered");
        } else if (registration != null) {
            Log.d("MyTestAppC2DM","C2DM registration_id = " + registration);
        } else {
            Log.w("MyTestAppC2DM", "C2DM No registration_id");
        }
    }

    public static void register(Context context){
        /* BEGIN OF DYNAMIC REGISTER */
        C2DMReceiver c2dmReceiver = new C2DMReceiver();

        IntentFilter receiveIntentFilter = new IntentFilter();
        receiveIntentFilter.addAction("com.google.android.c2dm.intent.RECEIVE");
        receiveIntentFilter.addCategory("mytestapp");
        context.registerReceiver(c2dmReceiver, receiveIntentFilter, "com.google.android.c2dm.permission.SEND", null);

        IntentFilter registrationIntentFilter = new IntentFilter();
        registrationIntentFilter.addAction("com.google.android.c2dm.intent.REGISTRATION");
        registrationIntentFilter.addCategory("mytestapp");
        context.registerReceiver(c2dmReceiver, registrationIntentFilter, "com.google.android.c2dm.permission.SEND", null);

        /*END OF DYNAMIC REGISTER*/

        Intent registrationIntent = new Intent("com.google.android.c2dm.intent.REGISTER");
        registrationIntent.putExtra("app", PendingIntent.getBroadcast(context, 0, new Intent(), 0));
        registrationIntent.putExtra("sender", "[e-mail]");
        ComponentName service = context.startService(registrationIntent);
        if(service!=null){
            Log.d("MyTestAppC2DM","C2DM Registration sent");
        }else{
            Log.d("MyTestAppC2DM","C2DM Service not found");
        }   
    }
}

解决方案

When a broadcast is sent by the system it will start applications to handle the intent if they have a matching intent filter declared in the manifest. Due to the nature of C2DM it is not useful to have a Broadcast Receiver installed dynamically because your application might not be running when a C2DM message is received. If its not running it won't be started for a dynamically installed receiver.

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