Question

我可以使用清单中的<receiver>成功注册我的Android应用程序与C2DM。但是，如果我从清单中删除<receiver>并使用上下文的registerReceiver方法注册我的接收器，则会收到SERVICE_NOT_AVAILABLE错误响应。我已经在模拟器和真实设备中重现了这种行为。

是否可以动态注册C2DM接收器？

这是我删除的清单的片段：

<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>

以下是代码：

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", "mysender@gmail.com");
        ComponentName service = context.startService(registrationIntent);
        if(service!=null){
            Log.d("MyTestAppC2DM","C2DM Registration sent");
        }else{
            Log.d("MyTestAppC2DM","C2DM Service not found");
        }   
    }
}

Answer 1

您可以在清单文件中注册接收器C2DMReceiver，并将意图发送到真正的BroadcastReceiver来处理它。

Answer 2

当系统发送广播时，如果它们在清单中声明了匹配的intent过滤器，它将启动应用程序来处理intent。由于C2DM的性质，动态安装广播接收器没有用，因为收到C2DM消息时您的应用程序可能没有运行。如果它没有运行，它将不会为动态安装的接收器启动。

Answer 3

在Activity中动态注册的BroadcastReceiver中接收 c2dm / gcm REGISTERED 意图可能有意义，但与原作者一样，我发现这不起作用（GCM除外）在JB）。是否有一个原因？我无法在任何地方的文档中找到这种限制。

使用registerReceiver的C2DM接收器的动态寄存器

3 个答案: