Question

我正在为一个Arduino设备开发一款Android应用程序，它是一种远程控制（通过蓝牙工作）。我已经可以将手机与远程蓝牙配对。此外，似乎我可以建立连接，我已经检查过ACTION_ACL_CONNECTED状态，如下所示：

 private final BroadcastReceiver connectedReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)) {
            showToast("Conneeeeeeeeeeeeected");
        }
    }
};

问题是，当我按下我的应用程序上的按钮将一些数据发送到远程蓝牙时，没有任何反应（LED必须将其状态从OFF更改为ON）。你可以检查一下我的ConnectThread有什么不对吗？这是我的代码：

public class MainActivity extends AppCompatActivity {

private final static UUID MY_UUID = UUID.fromString("ecff8f1a-ac66-11e6-80f5-76304dec7eb7");

BluetoothSocket mmSocket;

    Button whiteBtn; // after clicking this button, data from my phone are send to remote bluetooth
whiteBtn = (Button) findViewById(R.id.white_btn);
whiteBtn.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        whiteBtnOn();
    }
});


@Override
protected void onCreate(Bundle savedInstanceState) {

    // Get Bluetooth Adapter
    mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    if (mBluetoothAdapter == null) {
        showToast("Bluetooth is not supported on this device");
    }


    // Enable Bluetooth
    if (!mBluetoothAdapter.isEnabled()) {
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
    }

    mPairedDevicesArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, arrListPaired);
    pairedListView.setAdapter(mPairedDevicesArrayAdapter);


    // Find out which devices have been already paired
    Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
    if (pairedDevices.size() > 0) {
        showToast("Paired devices have been found");
        // Loop through the paired devices
        for (BluetoothDevice device : pairedDevices) {
            arrListPaired.add(device.getName() + '\n' + device.getAddress());
            mPairedDevicesArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, arrListPaired); 
        }
        pairedListView.setAdapter(mPairedDevicesArrayAdapter);
    }

    // Click event for items from paired devices list (Possible actions: “Connect”, which establishes connection between my phone and remote Bluetooth, “Unpair”, “Cancel”)

    pairedListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, final View view, final int position, long id) {

            final String info = ((TextView) view).getText().toString();
            int address = info.indexOf(":");
            final String adr = info.substring(address - 2, info.length());
            final int positionToRemove = position;

            final AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
            builder.setMessage("What should we do?");
            //builder.setMessage("Unpair this device?");

            builder.setPositiveButton("Unpair", new OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {

                    BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(adr);

                    // UNPAIR DEVICES
                    unpair(device);
                    arrListPaired.remove(positionToRemove);
                    mPairedDevicesArrayAdapter.notifyDataSetChanged();
                    // END UNPAIR DEVICES
                }
            });

            builder.setNeutralButton("Cancel", new OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    dialogInterface.cancel();
                }
            });

// Establish Connection between devices
            builder.setNegativeButton("Connect", new OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    showToast("Establish connection");
                    BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(adr);
                    ConnectThread ct = new ConnectThread(device);
                    ct.start();
                    IntentFilter filter = new IntentFilter();
                    filter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);
                    registerReceiver(connectedReceiver, filter);
                }

            });
            AlertDialog alertDialog = builder.create();
            alertDialog.show();
        }
    });


        @Override
protected void onPause() {
    if (mBluetoothAdapter != null) {
        if (mBluetoothAdapter.isDiscovering()) {
            mBluetoothAdapter.cancelDiscovery();
        }
    }
    super.onPause();
}

@Override
protected void onDestroy() {
    unregisterReceiver(mReceiver);
    super.onDestroy();
}


private void showToast(String message) {
    Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}


private void pairDevice(BluetoothDevice device) {
    try {
        IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
        registerReceiver(receiver, filter);

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

    } catch (Exception e) {
        e.printStackTrace();

    }
}

private void unpair(BluetoothDevice device) {
    showToast("Unpaired button is clicked");
    try {
        if(mmSocket!=null) {mmSocket.close();}
        Method m = device.getClass().getMethod("removeBond", (Class[]) null);
        m.invoke(device, (Object[]) null);
    } catch (NoSuchMethodException e) {
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}



// Connecting threat
private class ConnectThread extends Thread {
    private final BluetoothDevice mmDevice;

    public ConnectThread(BluetoothDevice device) {
        BluetoothSocket tmp = null;
        mmDevice = device;

        try {
            tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
        } catch (IOException e) {}
        mmSocket  = tmp;
    }

    public void run () {
        mBluetoothAdapter.cancelDiscovery();

        try {
            mmSocket.connect();
        } catch (IOException connectException) {

        try {
                mmSocket.close();
            } catch (IOException closeException) {}
            return;
        }
        //manageConnectedSocket(mmSocket);
    }
    public void cancel() {
        try {
            mmSocket.close();
        } catch (IOException e) {}
    }
}


// Managing a connection

    // Broadcast receiver for connected device
private final BroadcastReceiver connectedReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)) {
            showToast("Conneeeeeeeeeeeeected");
        }
    }
};


// Send data after clicking on a button
    private void whiteBtnOn() {
        if (mmSocket != null) {
            showToast("White btn is clicked");
           try {
                mmSocket.getOutputStream().write("TO".toString().getBytes());
            }
            catch (IOException e) {}
        }
    }
    }

}

提前感谢您的建议！

Answer 1

尝试将UUID用于蓝牙SPP：

private final static UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805f9b34fb");

而不是：

private final static UUID MY_UUID = UUID.fromString("ecff8f1a-ac66-11e6-80f5-76304dec7eb7");

无法在我的应用和远程蓝牙HC-05

1 个答案: