藍牙不搜索新設備/如何通過藍牙發送字符串消息？

Question

我在我的應用程序中使用藍牙，我想要我的應用程序ti搜索新設備並與它們配對，然後向它們發送預定義的消息，這是我到目前爲止：

1-這是

public void BlutoothInit() 

{ 

BlutoothListView=(ListView)findViewById(R.id.minimal_profile); 

pairedDevices = new ArrayList<String>(); 
    filter = new IntentFilter(BluetoothDevice.ACTION_FOUND); 
    receiver = new BroadcastReceiver(){ 
     @Override 
     public void onReceive(Context context, Intent intent) { 
      String action = intent.getAction(); 
      if(BluetoothDevice.ACTION_FOUND.equals(action)){ 
       BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 
       devices.add(device); 
       String s = ""; 
       for(int a = 0; a < pairedDevices.size(); a++){ 
        if(device.getName().equals(pairedDevices.get(a))){ 
         s = "(Paired)"; 
         break; 
        } 
       } 

       listAdapter.add(device.getName()+" "+s+" "+"\n"+device.getAddress()); 
      } 

      else if(BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)){ 
      } 
      else if(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){   
      } 
      else if(BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)){ 
       if(btAdapter.getState() == btAdapter.STATE_OFF){ 
        //turnOnBT(); 
       } 
      } 

     } 
    }; 
     registerReceiver(receiver, filter); 
     filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_STARTED); 
     registerReceiver(receiver, filter); 
     filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); 
     registerReceiver(receiver, filter); 
     filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED); 
     registerReceiver(receiver, filter); 
} 

2 - 她我使用藍牙

public void via_bluetooth (View v) { 
getPairedDevices(); 


final ListView DevicesListView = (ListView) findViewById(R.id.minimal_profile); 

ArrayAdapter<String> adapter; 

adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,DevicesList); 

DevicesListView.setAdapter(adapter); 
    adapter.notifyDataSetChanged(); 
    DevicesListView.setOnItemLongClickListener(new OnItemLongClickListener() { 
     @Override 
     public boolean onItemLongClick(AdapterView<?> arg0, View arg1, 
       int arg2, long arg3) { 
       Toast.makeText(getApplicationContext(), "device is not paired", 0).show(); 
      return true; 
     }     
     }); 

}

的函數初始化我的藍牙功能的變量「G etPairedDevices」工作正常，我得到的一切，我從我的應用程序 之外，但是當我調用這個函數來掃描新設備

public void ScanNewDevices(View v) { 
    // TODO Auto-generated method stub 
    if (btAdapter.isDiscovering()) { 
     btAdapter.cancelDiscovery(); 
    } 
    btAdapter.startDiscovery(); 
    try{ 
    final BroadcastReceiver mReceiver = new BroadcastReceiver() { 
     public void onReceive(Context context, Intent intent) { 
      String action = intent.getAction(); 
      // When discovery finds a device 
      if (BluetoothDevice.ACTION_FOUND.equals(action)) { 
       // Get the BluetoothDevice object from the Intent 
       BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 
       // Add the name and address to an array adapter to show in a ListView 
       DevicesList.add(device.getName() + "\n" + device.getAddress()); 
      } 
     } 
    }; 
    // Register the BroadcastReceiver 
    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND); 
    registerReceiver(mReceiver, filter); // Don't forget to unregister during onDestroy 
    } 
    catch (Exception e) { 
      Toast.makeText(getApplicationContext(), e.toString(), 0).show(); 
     } 
} 

錯誤說做出對設備‘源沒有找到。’出現，什麼都不做！ 什麼是iam做錯了什麼是缺少搜索設備和發送消息？

Answer 1

private void pairDevice(BluetoothDevice device) { 
    try { 

     Method m = device.getClass().getMethod("createBond", (Class[]) null); 
     m.invoke(device, (Object[]) null); 

     Toast.makeText(context,"paired finished",3000).show(); 
     } catch (Exception e) 
      { 
     Toast.makeText(context,"error"+e.getMessage(),3000).show(); 

    } 
    } 
     //try this for paring...