<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
package alice.bw.com.day04_yuekaodemo;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.os.Looper;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.UUID;
public class BluetoothActivity extends AppCompatActivity implements View.OnClickListener {
public static final String TAG = "ABCDE";
private List<String> dataSource = new ArrayList<>();
private TextView devices_list;
private BluetoothAdapter bluetoothAdapter;
private Set<BluetoothDevice> bondedDevices;
private TextView searchBlueTooth;
private ListView bluetooth_devices_list;
//第二部开启广播并且进行获取周边蓝牙并输出到TextView
private final BroadcastReceiver receiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
bluetoothAdapter.isEnabled();
String action = intent.getAction();
//获取已经搜索到的设备
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice bluetoothDevice = (BluetoothDevice) intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (/*bluetoothDevice.getBondState() != BluetoothDevice.BOND_BONDED*/true) {
String address = bluetoothDevice.getAddress();//获取蓝牙的MAC地址
String name = bluetoothDevice.getName();//获取蓝牙的名称
String name_address= name + ":" + address;
dataSource.add(name_address);
// devices_list.append(name + ":" + address + "\n");//将蓝牙的地址和名称设置到TextView上
}
} else if (bluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
devices_list.append("搜索完毕");
MyListViewAdapter myListViewAdapter = new MyListViewAdapter(BluetoothActivity.this,dataSource);
bluetooth_devices_list.setAdapter(myListViewAdapter);
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
//启动子线程创建蓝牙服务器
IntentFilter intentFilter = new IntentFilter();//广播接收者的过滤器
intentFilter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);//添加
intentFilter.addAction(BluetoothDevice.ACTION_FOUND);//添加发现蓝牙设备的action动作
intentFilter.addAction(bluetoothAdapter.ACTION_DISCOVERY_FINISHED);//扫描蓝牙设备完毕
this.registerReceiver(receiver, intentFilter);//注册蓝牙广播
//第一步打开蓝牙并且将获取到的信息输出
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();//获取蓝牙适配器
bondedDevices = bluetoothAdapter.getBondedDevices();//将搜索到的蓝牙设备放入Set集合中
/* for (BluetoothDevice device : bondedDevices) {
String address = device.getAddress();//获取蓝牙的MAC地址
String name = device.getName();//获取蓝牙的名称
devices_list.append(name + ":" + address + "\n");//将蓝牙的地址和名称设置到TextView上
}*/
BluetoothServerSocketThread bluetoothServerSocketThread = new BluetoothServerSocketThread();
bluetoothServerSocketThread.start();//开启子线程
}
//第三部进行实例化
private void initView() {
devices_list = (TextView) findViewById(R.id.devices_list);
searchBlueTooth = (TextView) findViewById(R.id.searchBlueTooth);
searchBlueTooth.setOnClickListener(this);
bluetooth_devices_list = (ListView) findViewById(R.id.bluetooth_devices_list);
//为ListView添加点击事件，事件的具体内容上是建立蓝牙客户端，客户端给服务器发送一条消息
bluetooth_devices_list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
String TAG = "ABCDE";
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Log.i(TAG,"0");
String devices_name_addresss = dataSource.get(position);//从扫描到的蓝牙设备中拿到蓝牙设备的地址和名称
Log.i(TAG,"1");
// bw:11.22222.444
String devices_addresss = devices_name_addresss.substring(devices_name_addresss.indexOf(":") + 1);
Log.i(TAG,"2");
//getRemoteDevice(String address)
//通过蓝牙设备的地址创建蓝牙设备
BluetoothDevice remoteDevice = bluetoothAdapter.getRemoteDevice(devices_addresss);
Log.i(TAG,"3");
// createRfcommSocketToServiceRecord(UUID uuid)
UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
Log.i(TAG,"4");
try {
//根据已经创建的蓝牙设备创建一个该蓝牙设备的客户端，这里的uuid相当于是一个IP地址，通过地址就可以找到服务器
BluetoothSocket devicesClient = remoteDevice.createRfcommSocketToServiceRecord(uuid);
Log.i(TAG,"5");
devicesClient.connect();//链接到蓝牙服务器
Log.i(TAG,"6");
OutputStream outputStream = devicesClient.getOutputStream();
Log.i(TAG,"7");
outputStream.write("发送信息到蓝牙设备".getBytes());
Log.i(TAG,"8");
outputStream.flush();
Log.i(TAG,"9");
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
//点击搜索周围的蓝牙
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.searchBlueTooth://点击按钮开始搜索周边的蓝牙
if (bluetoothAdapter.isDiscovering()) {//如果正在搜索蓝牙就停止搜索
bluetoothAdapter.cancelDiscovery();
}
bluetoothAdapter.startDiscovery();//使用蓝牙适配器搜索周边蓝牙
break;
}
}
//自定义一个展示发现的蓝牙设备的LListView控件的适配器
class MyListViewAdapter extends BaseAdapter {
private Context context;
private List<String> dataSource ;
public MyListViewAdapter(Context context, List<String> dataSource) {
this.context = context;
this.dataSource = dataSource;
}
@Override
public int getCount() {//获取item条目的个数
return dataSource.size();
}
@Override
public Object getItem(int position) {
return dataSource.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = LayoutInflater.from(context);
convertView = inflater.inflate(R.layout.list_item, null);
}
TextView item = (TextView) convertView.findViewById(R.id.item);
item.setText(dataSource.get(position));
return convertView;
}
}
private class BluetoothServerSocketThread extends Thread {
private BluetoothServerSocket bluetoothServerSocket;
private BluetoothSocket clientSocket;
private InputStream inputStream;
private OutputStream outputStream;
public BluetoothServerSocketThread( ) {
//listenUsingRfcommWithServiceRecord(String name, UUID uuid)
// UUID uuid = UUID.randomUUID();
try {
//创建蓝牙服务器，第一个参数是服务器的名称，第二个是一个唯一标识当前服务器的ID，相当于是一个IP地址
UUID uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
bluetoothServerSocket = bluetoothAdapter.listenUsingRfcommWithServiceRecord("1508a_Service", uuid);
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void run() {
super.run();
try {
clientSocket = bluetoothServerSocket.accept();//监听客户端的链接
inputStream = clientSocket.getInputStream();
outputStream = clientSocket.getOutputStream();
while (true) {
byte[] buffer = new byte[1024];
int count = inputStream.read(buffer);
String message = new String(buffer, 0, count, "utf-8");
Looper.prepare();
Toast.makeText(BluetoothActivity.this,message,Toast.LENGTH_LONG).show();
Looper.loop();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
本文详细介绍了一个蓝牙应用程序的开发过程，包括如何使用Android系统提供的API来实现蓝牙设备的搜索、连接及数据传输等功能。文章通过具体代码展示了如何创建蓝牙服务器与客户端，并实现两者之间的通信。
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