蓝牙打开的两种方式：一种是有对话框弹出，另一种是没有对话框。
通過意图打开 Intent open = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); //只是打開時間，单位秒 open.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,300); startActivity(open);
//静默打开 (没有对话框) BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); adapter.enable();
关闭蓝牙
// 关闭蓝牙 BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); adapter.disable();
扫描蓝牙设备：扫描的有两种结果一种是已经配对过的，另外一种就是周围有的设备
BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); adapter.startDiscovery();//开始扫描蓝牙设备 //返回已经配对过的设备 Set<BluetoothDevice> bondedDevices = adapter.getBondedDevices();
扫描周围的设备需要注册广播，在oncreate方法里
//注册找到设备广播 IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND); registerReceiver(mReceiver, filter); //注册完成扫描广播 filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); registerReceiver(mReceiver, filter);
//回掉广播 BroadcastReceiver mReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { String action = intent.getAction(); //找到设备 if (BluetoothDevice.ACTION_FOUND.equals(action)) { BluetoothDevice device = intent .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); // if (device.getBondState() != BluetoothDevice.BOND_BONDED) { Log.d("mytag",device.getName()); Bean bean = new Bean(); bean.setAddress(device.getAddress()); bean.setName(device.getName()); list.add(bean); Myadapter.notifyDataSetChanged(); //} } //搜索完成 else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED .equals(action)) { setTitle("搜索完成"); // if (mNewDevicesAdapter.getCount() == 0) { // Log.v("tag", "find over"); // } } } };
然后是让一个手机作为服务器，得分为以下步骤，
这里需要注意的是需要一个唯一的uuid，两端必须保持一致
1，开启子线程等待客户端接入，
2，接入成功开启接收聊天的子线程，
3，发送时开启发送子线程
package com.example.bluetooth; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.io.PrintStream; import java.util.UUID; import android.support.v7.app.ActionBarActivity; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothServerSocket; import android.bluetooth.BluetoothSocket; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; public class ServerActivity extends ActionBarActivity { private TextView tv; private Button send; private EditText input; private BluetoothAdapter adapter; // 蓝牙适配器 private BluetoothServerSocket serverSocket; // 服务器socket private BluetoothSocket socker; // 客户端socket PrintStream out; BufferedReader in; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_server); tv = (TextView) findViewById(R.id.sstate); send = (Button) findViewById(R.id.ssend); input = (EditText) findViewById(R.id.sinput); //发送按钮 send.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { new Thread(new Runnable() { @Override public void run() { out.println(input.getText().toString()); out.flush(); handle.sendEmptyMessage(2); } }).start(); } }); init(); } // 创建蓝牙服务器端 private void init() { tv.setText("服务器已经启动，正在等待链接。。。 "); new Thread(new Runnable() { @Override public void run() { // 获得适配器 adapter = BluetoothAdapter.getDefaultAdapter(); try { //uuid作为链接标识 serverSocket = adapter.listenUsingRfcommWithServiceRecord( "test", UUID.fromString("3F2504E0-4F89-11D3-9A0C-0305E82C3301")); //等待客户端连接 socker = serverSocket.accept(); if(socker!=null){ //获得输入输出流,向客户端输入输出信息 in = new BufferedReader(new InputStreamReader(socker.getInputStream())); out = new PrintStream(socker.getOutputStream()); } handle.sendEmptyMessage(0); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }).start(); } private Handler handle = new Handler(){ public void handleMessage(android.os.Message msg) { switch (msg.what) { //成功 case 0: tv.append("链接成功 "); new Thread(new ReadInfoThread()).start(); break; case 1: String m = (String) msg.obj; tv.append(m+" "); break; case 2: input.setText(""); break; default: break; } }; }; // boolean isTrue = true; class ReadInfoThread implements Runnable{ String info = ""; @Override public void run() { while (true) { try { info = in.readLine(); Message msg = handle.obtainMessage(); msg.what = 1; msg.obj = info; handle.sendMessage(msg); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } @Override protected void onStop() { // TODO Auto-generated method stub super.onStop(); try { if(socker!=null) socker.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
客户端和服务器差不多的逻辑
package com.example.bluetooth; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintStream; import java.util.UUID; import android.support.v7.app.ActionBarActivity; import android.annotation.SuppressLint; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.bluetooth.BluetoothSocket; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; public class ClitenActivity extends ActionBarActivity { private TextView tv; private Button send; private EditText input; private BluetoothAdapter adapter; // 蓝牙适配器 private BluetoothDevice device; private BluetoothSocket socker; // 客户端socket PrintStream out; BufferedReader in; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_cliten); initView(); init(); } private void init() { tv.setText("正在与服务器进行连接... "); new Thread(new Runnable() { @SuppressLint("NewApi") @Override public void run() { try { adapter = BluetoothAdapter.getDefaultAdapter(); device = adapter.getRemoteDevice(getIntent().getStringExtra( "address")); socker = device.createInsecureRfcommSocketToServiceRecord(UUID .fromString("3F2504E0-4F89-11D3-9A0C-0305E82C3301")); if(socker!=null){ socker.connect(); //获得输入输出流,想客户端输入输出信息 in = new BufferedReader(new InputStreamReader(socker.getInputStream())); out = new PrintStream(socker.getOutputStream()); } handle.sendEmptyMessage(0); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }).start(); } private void initView() { tv = (TextView) findViewById(R.id.state); send = (Button) findViewById(R.id.send); input = (EditText) findViewById(R.id.input); send.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { new Thread(new Runnable() { @Override public void run() { out.println(input.getText().toString()); out.flush(); handle.sendEmptyMessage(2); } }).start(); } }); } private Handler handle = new Handler(){ public void handleMessage(android.os.Message msg) { switch (msg.what) { case 0: tv.append("链接成功"); new Thread(new Runnable() { String info = ""; @Override public void run() { while (true) { try { info = in.readLine(); System.out.println("收到"+info); Message msg = handle.obtainMessage(); msg.what = 1; msg.obj = info; handle.sendMessage(msg); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }).start(); break; case 1: String m = (String) msg.obj; tv.append(m+" "); break; case 2: input.setText(""); break; default: break; } }; }; class ReadInfoThread implements Runnable{ String info = ""; @Override public void run() { while (true) { try { info = in.readLine(); System.out.println("收到"+info); Message msg = handle.obtainMessage(); msg.what = 1; msg.obj = info; handle.sendMessage(msg); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } @Override protected void onStop() { // TODO Auto-generated method stub super.onStop(); try { if(socker!=null) socker.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
主界面逻辑代码
package com.example.bluetooth; import java.util.ArrayList; import java.util.List; import java.util.Set; import android.support.v7.app.ActionBarActivity; import android.annotation.SuppressLint; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothAdapter.LeScanCallback; import android.bluetooth.BluetoothDevice; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Bundle; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListView; public class MainActivity extends ActionBarActivity { private List<Bean> list = new ArrayList<Bean>(); private ListView lv; private MyAdapter Myadapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //注册找到设备广播 IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND); registerReceiver(mReceiver, filter); //注册完成扫描广播 filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); registerReceiver(mReceiver, filter); lv = (ListView) findViewById(R.id.lv); Myadapter = new MyAdapter(this, list); lv.setAdapter(Myadapter); lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Intent intent = new Intent(MainActivity.this,ClitenActivity.class); intent.putExtra("address",list.get(position).getAddress()); startActivity(intent); } }); findViewById(R.id.button4).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(MainActivity.this,ServerActivity.class); startActivity(intent); } }); findViewById(R.id.button1).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //打開 /* * 通過意图打开 * Intent open = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); //只是打開時間 open.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,300); startActivity(open);*/ //静默打开 (没有对话框) BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); adapter.enable(); } }); findViewById(R.id.button2).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // 关闭蓝牙 BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); adapter.disable(); } }); findViewById(R.id.button3).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); adapter.startDiscovery();//开始扫描蓝牙设备 Bean bean; //返回已经配对过的设备 Set<BluetoothDevice> bondedDevices = adapter.getBondedDevices(); for (BluetoothDevice bluetoothDevice : bondedDevices) { bean = new Bean(); bean.setName("已经配对"+bluetoothDevice.getName()); bean.setAddress(bluetoothDevice.getAddress()); list.add(bean); } Myadapter.notifyDataSetChanged(); } }); } @Override protected void onDestroy() { super.onDestroy(); unregisterReceiver(mReceiver); }; //回掉广播 BroadcastReceiver mReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { String action = intent.getAction(); //找到设备 if (BluetoothDevice.ACTION_FOUND.equals(action)) { BluetoothDevice device = intent .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); // if (device.getBondState() != BluetoothDevice.BOND_BONDED) { Log.d("mytag",device.getName()); Bean bean = new Bean(); bean.setAddress(device.getAddress()); bean.setName(device.getName()); list.add(bean); Myadapter.notifyDataSetChanged(); //} } //搜索完成 else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED .equals(action)) { setTitle("搜索完成"); // if (mNewDevicesAdapter.getCount() == 0) { // Log.v("tag", "find over"); // } } } }; }