Android蓝牙搜索服务可用设备

Question

我想发现可用的蓝牙设备在后台服务。我被困在“startActivityForResult”部分，因为服务不是活动。请帮助...

private void CheckBTState() { 
    // TODO Auto-generated method stub 
     // Check for Bluetooth support and then check to make sure it is turned on 
    // If it isn't request to turn it on 
    // List paired devices 
    // Emulator doesn't support Bluetooth and will return null 
    Log.d("check","4"); 
     if (btAdapter.isEnabled()) { 
//  out.append("\nBluetooth is enabled..."); 

     // Starting the device discovery 
     btAdapter.startDiscovery(); 
     Log.d("check","5"); 
     } else { 

     Intent enableBtIntent = new Intent(btAdapter.ACTION_REQUEST_ENABLE); 
     Log.d("check","6"); 

    STUCK OVER HERE.... DON'T NO HOW TO CALL startActivityForResult IN SERVICE 

// ((Activity) context).startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT); 
     // activity.startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT); 


     } 


} 

Answer 1

您必须在启动服务之前激活蓝牙。

只需添加到您的活动验证码：

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 

    if (requestCode == <needed value>) { 


    } 
    super.onActivityResult(requestCode, resultCode, data); 
}