註冊reciver過濾器，無法找到

你能幫我找出爲什麼brodcast reciver的註冊返回null嗎？這是代碼：註冊reciver過濾器，無法找到

ScoIntent = new IntentFilter(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED); 
       sReceiver = new ScoReceiver(context, Tmp); 
       if (context.registerReceiver(sReceiver, ScoIntent) == null) { 
        Log("FBR.GetBlueConnect:Error", "Can not find receiver ACTION_CONNECTION_STATE_CHANGED"); 
        HFS.DisplayText("Can not connect to Bluetooth Headset, Please Exit", true); 
       }

，這是reciver：

class ScoReceiver extends BroadcastReceiver {  
    public ScoReceiver(Context mcontext, Tools t){ 
    bContext = mcontext; 
    tools = t; 
} 
@Override 
public void onReceive(Context context, Intent arg1) { 
    tools.Log("ScoReceiver:onReceive", "In"); 

    //arg1 = new Intent(AudioManager.ACTION_SCO_AUDIO_STATE_UPDATED); 
    String action = arg1.getAction(); 
    tools.Log("ScoReceiver:onReceive", ">>> Bluetooth SCO state changed !!! "); 
    if(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED.equals(action)) { 
     int status = arg1.getIntExtra(BluetoothHeadset.EXTRA_STATE, AudioManager.SCO_AUDIO_STATE_ERROR);

}

來源

2012-03-27 c v

的javadoc說，

返回第一粘貼意圖發現匹配濾波器，如果沒有，則返回空值。

這個接收器是否有粘性意圖？這裏有一個貼子，討論棍子和非粘性意圖之間的差別，

what is the difference between sendStickyBroadcast and sendBroadcast in Android

來源

2012-03-27 14:02:58

我已閱讀本Java文檔，但在粥手這個[鏈接] |（HTTP：// developer.android.com/reference/android/bluetooth/BluetoothHeadset.html）是關於brodcast意圖不粘性，在ather函數中提到dirctly – 2012-03-27 16:41:49

http://developer.android.com/reference/android/bluetooth/BluetoothHeadset.html in這：ACTION_CONNECTION_STATE_CHANGED – 2012-03-27 16:45:00

我完全糊塗 – 2012-03-27 17:10:15

註冊reciver過濾器，無法找到

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