Question

我在我的应用程序中使用蓝牙，我希望我的应用程序搜索新设备并与它们配对，然后向他们发送预定义消息，这是我到目前为止所做的：

1-这是初始化我的蓝牙变量的功能

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-她正在使用蓝牙

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;
        }                 
      });

}

函数“getPairedDevices”工作正常，我从我的应用程序外部获取所有与之配对的设备但是当我调用此功能来扫描新设备时

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();
         }
}

错误显示“未找到来源”。出现什么都不做！我们做错了什么以及搜索设备并向他们发送消息时缺少什么？

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...

蓝牙不搜索新设备/如何通过蓝牙发送字符串消息？

1 个答案: