Android 自定义广播接收器不工作

我知道这是一个热门话题，但我找不到一个适合我的案例。为了在我的设计中获得一些模块化，我创建了一个单一的广播接收器，它可以监听任何网络状态的变化，并充当连接now广播到我的应用程序的通用网关。该类称为ConnectivityReceiver，基本上是这样的：

public class ConnectivityReceiver extends BroadcastReceiver {
    private static final String TAG = "ConnectivityReceiver";

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d(TAG,"onReceive called");
        Log.d(TAG,"Intent.getAction() is "+intent.getAction());
        if(intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)){
            Intent out = new Intent(MapFragment.ACTION_LOCAL_CONNECTIVITY_CHANGE);
            Log.d(TAG,"Sending broadcast");
            context.sendBroadcast(out);
        }
    }
}

我确实在舱单上登记了它，它运行得很好。然后，我有一个片段想知道这种连接变化，所以我创建了一个简单的内部BroadcastReceiver，如下所示：

public BroadcastReceiver connectivityReceiver = new BroadcastReceiver(){

        @Override
        public void onReceive(Context context, Intent intent) {
            Log.d(TAG,"got connection info!");
        }
};

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d(TAG,"onCreate");
    connectivityReceiver = new ConnectivityReceiver();
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(MapFragment.ACTION_LOCAL_CONNECTIVITY_CHANGE);
    this.getActivity().registerReceiver(connectivityReceiver, intentFilter);

    /* Creating a ParseHandler, this will be needed for the PathParser */
    mParserHandler = new ParserHandler(getActivity());
}

public static final String ACTION_LOCAL_CONNECTIVITY_CHANGE = "com.spiral.android.transito.CONNECTIVITY_CHANGE";

class LocalBroadcastReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d(TAG,"got connection info!");
    }
};

这一个并没有在清单中注册，但我非常小心地分别在片段的onCreate和onDestroy方法中注册和注销了它。大概是这样的：

public BroadcastReceiver connectivityReceiver = new BroadcastReceiver(){

        @Override
        public void onReceive(Context context, Intent intent) {
            Log.d(TAG,"got connection info!");
        }
};

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d(TAG,"onCreate");
    connectivityReceiver = new ConnectivityReceiver();
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(MapFragment.ACTION_LOCAL_CONNECTIVITY_CHANGE);
    this.getActivity().registerReceiver(connectivityReceiver, intentFilter);

    /* Creating a ParseHandler, this will be needed for the PathParser */
    mParserHandler = new ParserHandler(getActivity());
}

public static final String ACTION_LOCAL_CONNECTIVITY_CHANGE = "com.spiral.android.transito.CONNECTIVITY_CHANGE";

class LocalBroadcastReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d(TAG,"got connection info!");
    }
};

及

但是由于某种未知的原因，链中的第二个广播接收器无法接收广播！它正在被发布，因为在清单中注册的第一个正在获得它

有什么想法吗？自定义操作名称如下所示：

public BroadcastReceiver connectivityReceiver = new BroadcastReceiver(){

        @Override
        public void onReceive(Context context, Intent intent) {
            Log.d(TAG,"got connection info!");
        }
};

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d(TAG,"onCreate");
    connectivityReceiver = new ConnectivityReceiver();
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(MapFragment.ACTION_LOCAL_CONNECTIVITY_CHANGE);
    this.getActivity().registerReceiver(connectivityReceiver, intentFilter);

    /* Creating a ParseHandler, this will be needed for the PathParser */
    mParserHandler = new ParserHandler(getActivity());
}

public static final String ACTION_LOCAL_CONNECTIVITY_CHANGE = "com.spiral.android.transito.CONNECTIVITY_CHANGE";

class LocalBroadcastReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d(TAG,"got connection info!");
    }
};

---

好的，我通过创建一个扩展BroadcastReceiver的非匿名内部类来解决这个问题。但我不知道为什么另一种方法不起作用。修改的代码基本上是第二个框，现在看起来如下：

public BroadcastReceiver connectivityReceiver = new BroadcastReceiver(){

        @Override
        public void onReceive(Context context, Intent intent) {
            Log.d(TAG,"got connection info!");
        }
};

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d(TAG,"onCreate");
    connectivityReceiver = new ConnectivityReceiver();
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(MapFragment.ACTION_LOCAL_CONNECTIVITY_CHANGE);
    this.getActivity().registerReceiver(connectivityReceiver, intentFilter);

    /* Creating a ParseHandler, this will be needed for the PathParser */
    mParserHandler = new ParserHandler(getActivity());
}

public static final String ACTION_LOCAL_CONNECTIVITY_CHANGE = "com.spiral.android.transito.CONNECTIVITY_CHANGE";

class LocalBroadcastReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        Log.d(TAG,"got connection info!");
    }
};

就像前面一样，我在片段的作用域中创建了这个内部类的全局实例，就像我在onCreate中注册它并在onDestroy中注销它之前一样

将：

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // connectivityReceiver = new ConnectivityReceiver(); // why did you do this?
    Log.d(TAG,"onCreate");
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(MapFragment.ACTION_LOCAL_CONNECTIVITY_CHANGE);
    this.getActivity().registerReceiver(connectivityReceiver, intentFilter);
    /* Creating a ParseHandler, this will be needed for the PathParser */
    mParserHandler = new ParserHandler(getActivity());
}

工作