| Bluetooth | Arduino | |
| TX | - | RX |
| RX | - | TX |
| GND | - | GND |
| VCC | - | 3.3V |
1
| private static final UUID SERIAL_PORT_SERVICE_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); |
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| // 取自http://www.anddev.org/serial_over_bluetooth_simple_test_client-t11106.html裡的範例 package com.example.thinbtclient; import java.io.IOException; import java.io.OutputStream; import java.util.UUID; import android.app.Activity; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.bluetooth.BluetoothSocket; import android.os.Bundle; import android.util.Log; import android.widget.Toast; public class ThinBTClient extends Activity { private static final String TAG = "THINBTCLIENT"; private static final boolean D = true; private BluetoothAdapter mBluetoothAdapter = null; private BluetoothSocket btSocket = null; private OutputStream outStream = null; // Well known SPP UUID (will *probably* map to // RFCOMM channel 1 (default) if not in use); // see comments in onResume(). private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); // ==> hardcode your server's MAC address here <== private static String address = "XX:XX:XX:XX:XX:XX"; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); if (D) Log.e(TAG, "+++ ON CREATE +++"); mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); if (mBluetoothAdapter == null) { Toast.makeText(this, "Bluetooth is not available.", Toast.LENGTH_LONG).show(); finish(); return; } if (!mBluetoothAdapter.isEnabled()) { Toast.makeText(this, "Please enable your BT and re-run this program.", Toast.LENGTH_LONG).show(); finish(); return; } if (D) Log.e(TAG, "+++ DONE IN ON CREATE, GOT LOCAL BT ADAPTER +++"); } @Override public void onStart() { super.onStart(); if (D) Log.e(TAG, "++ ON START ++"); } @Override public void onResume() { super.onResume(); if (D) { Log.e(TAG, "+ ON RESUME +"); Log.e(TAG, "+ ABOUT TO ATTEMPT CLIENT CONNECT +"); } // When this returns, it will 'know' about the server, // via it's MAC address. BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address); // We need two things before we can successfully connect // (authentication issues aside): a MAC address, which we // already have, and an RFCOMM channel. // Because RFCOMM channels (aka ports) are limited in // number, Android doesn't allow you to use them directly; // instead you request a RFCOMM mapping based on a service // ID. In our case, we will use the well-known SPP Service // ID. This ID is in UUID (GUID to you Microsofties) // format. Given the UUID, Android will handle the // mapping for you. Generally, this will return RFCOMM 1, // but not always; it depends what other BlueTooth services // are in use on your Android device. try { btSocket = device.createRfcommSocketToServiceRecord(MY_UUID); } catch (IOException e) { Log.e(TAG, "ON RESUME: Socket creation failed.", e); } // Discovery may be going on, e.g., if you're running a // 'scan for devices' search from your handset's Bluetooth // settings, so we call cancelDiscovery(). It doesn't hurt // to call it, but it might hurt not to... discovery is a // heavyweight process; you don't want it in progress when // a connection attempt is made. mBluetoothAdapter.cancelDiscovery(); // Blocking connect, for a simple client nothing else can // happen until a successful connection is made, so we // don't care if it blocks. try { btSocket.connect(); Log.e(TAG, "ON RESUME: BT connection established, data transfer link open."); } catch (IOException e) { try { btSocket.close(); } catch (IOException e2) { Log.e(TAG,"ON RESUME: Unable to close socket during connection failure", e2); } } // Create a data stream so we can talk to server. if (D) Log.e(TAG, "+ ABOUT TO SAY SOMETHING TO SERVER +"); try { outStream = btSocket.getOutputStream(); } catch (IOException e) { Log.e(TAG, "ON RESUME: Output stream creation failed.", e); } String message = "Hello message from client to server."; byte[] msgBuffer = message.getBytes(); try { outStream.write(msgBuffer); } catch (IOException e) { Log.e(TAG, "ON RESUME: Exception during write.", e); } } @Override public void onPause() { super.onPause(); if (D) Log.e(TAG, "- ON PAUSE -"); if (outStream != null) { try { outStream.flush(); } catch (IOException e) { Log.e(TAG, "ON PAUSE: Couldn't flush output stream.", e); } } try { btSocket.close(); } catch (IOException e2) { Log.e(TAG, "ON PAUSE: Unable to close socket.", e2); } } @Override public void onStop() { super.onStop(); if (D) Log.e(TAG, "-- ON STOP --"); } @Override public void onDestroy() { super.onDestroy(); if (D) Log.e(TAG, "--- ON DESTROY ---"); } } AndroidManifest.xml裡的Permission設定加下述二行 |
