更改藍牙可發現性時不發送廣播

當前我正嘗試設置一個應用程序讓兩個設備通過藍牙進行通信。更改藍牙可發現性時不發送廣播

我有一個屏幕顯示單個Button。點擊這個按鈕可以讓設備發現並禁用按鈕。當設備不再可被發現時，該按鈕應該被再次啓用。

就像在Dev Guide中建議的那樣，我註冊BroadcastReceiver爲，當可發現性結束時通知。

問題：

有時候，我不要當設備不再發現接收任何廣播。另一方面，我通常在進入可發現性時發送2個廣播。 Discoverability正常工作，由LogCat和設備在120秒內看到我的手機（HTC Desire HD）證明。

這是logcat的紀錄展示在立即得到2個廣播開始可發現後：

03-25 23:01:47.557: INFO/System.out(16905): --------broadcast received------------- 
03-25 23:01:47.557: DEBUG/MuliplayerServerActivity(16905): current scan mode: 21 
03-25 23:01:47.557: DEBUG/MuliplayerServerActivity(16905): previous scan mode: 23 
03-25 23:01:47.557: INFO/System.out(16905): --------broadcast received------------- 
03-25 23:01:47.557: DEBUG/MuliplayerServerActivity(16905): current scan mode: 23 
03-25 23:01:47.557: DEBUG/MuliplayerServerActivity(16905): previous scan mode: 21

我的代碼開始可發現如下：

private void becomeVisible() { 

    Intent discoverableIntent = new Intent(
      BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); 
    startActivityForResult(discoverableIntent, 
      CODE_REQUEST_MAKE_DISCOVERABLE); 

}

我BroadcastReceiver看起來是這樣的：

private final BroadcastReceiver discoverableModeChangedReceiver = new BroadcastReceiver() { 

    @Override 
    public void onReceive(Context context, Intent intent) { 

     System.out.println("--------broadcast received-------------"); 
     int scanMode = intent.getIntExtra(BluetoothAdapter.EXTRA_SCAN_MODE, 
       0); 
     int scanModePrevious = intent.getIntExtra(
       BluetoothAdapter.EXTRA_PREVIOUS_SCAN_MODE, 0); 
     Log.d(TAG, "current scan mode: " + scanMode); 
     Log.d(TAG, "previous scan mode: " + scanModePrevious); 

     if (scanMode == BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) { 
      // show button 
      findViewById(R.id.btn_become_visible).setEnabled(false); 
     } else { 
      // hide button 
      findViewById(R.id.btn_become_visible).setEnabled(true); 
     } 
    } 
};

來源

2012-03-25 Jonathan Roth

您必須註冊操作第一個：

IntentFilter intent = new IntentFilter(); 
intent.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED); 
intent.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); 
intent.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED); 
registerReceiver(discoverableModeChangedReceiver, intent);

來源

2012-06-14 07:34:30 colin

接收方已註冊。你知道這是否只是我的手機上的問題（慾望高清）？ – 2012-07-15 20:38:07

更改藍牙可發現性時不發送廣播

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