本文实例为大家分享了Android实现蓝牙原理代码，供大家参考，具体内容如下

package com.example.se7en.testbluetooth;import android.app.Activity;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.util.Log;import android.view.View;import android.widget.AdapterView;import android.widget.EditText;import android.widget.ListView;import android.widget.Toast;import java.io.IOException;import java.util.ArrayList;import java.util.List;import java.util.UUID;public class MainActivity extends Activity{ private BluetoothAdapter adapter; private MyReceiver receiver; private ListView mListView; private List<BluetoothDevice> mDevices; private com.example.se7en.testbluetooth.DeviceAdapter mDeviceAdapter; private BluetoothSocket mSocket; private EditText et; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mListView = (ListView) findViewById(R.id.lv); et = (EditText) findViewById(R.id.et); adapter = BluetoothAdapter.getDefaultAdapter(); BlueToothHandler.getInstance().setContext(this); init(); } private void init() { initListView(); // 判断是否支持蓝牙功能 if (adapter == null) { Toast.makeText(this, "该手机不支持蓝牙功能", Toast.LENGTH_LONG).show(); return; } // 判断蓝牙功能是否打开 if (!adapter.isEnabled()) { // 强行打开// adapter.enable(); Intent intent=new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivity(intent); } IntentFilter filter = new IntentFilter(); // 注册扫描开始的广播 filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED); // 注册扫描结束的广播 filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); // 注册扫描已经找到设备的广播 filter.addAction(BluetoothDevice.ACTION_FOUND); receiver = new MyReceiver(); registerReceiver(receiver, filter); startBlueServer(); } /** * 启动蓝牙服务 */ private void startBlueServer() { new Thread() { @Override public void run() { while (true) { try { BluetoothServerSocket serverSocket = adapter .listenUsingRfcommWithServiceRecord( "蓝牙服务", UUID.fromString("997f1b20-b4a0-45ea-a7dd-b2097299b1f6")); mSocket = serverSocket.accept();//阻塞 BlueToothHandler.getInstance().setSocket(mSocket); } catch (IOException e) { e.printStackTrace(); } } } }.start(); } public void doClick(View view) { switch (view.getId()) { case R.id.btn: mDevices.clear(); mDeviceAdapter.notifyDataSetChanged(); // 判断是否正在扫描，如果没在扫描那么就开始扫描 if (!adapter.isDiscovering() && adapter.startDiscovery()) { Toast.makeText(this, "开始扫描周围的蓝牙设备", Toast.LENGTH_LONG) .show(); } break; case R.id.send: if ("".equals(et.getText().toString())) { Toast.makeText(this, "内容不能为空", Toast.LENGTH_SHORT).show(); return; } if (BlueToothHandler.getInstance().getSocket() == null) { Toast.makeText(this, "还未连接设备", Toast.LENGTH_SHORT).show(); return; } new Thread() { @Override public void run() { BlueToothHandler.getInstance().sendMessage( et.getText().toString()); } }.start(); break; case R.id.dis: BlueToothHandler.getInstance().closeSocket(); break; } } @Override protected void onDestroy() { super.onDestroy(); if (receiver != null) { // 注销广播 unregisterReceiver(receiver); } } private void initListView() { mDevices = new ArrayList<BluetoothDevice>(); mDeviceAdapter = new com.example.se7en.testbluetooth.DeviceAdapter(this, mDevices); mListView.setAdapter(mDeviceAdapter); mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { try { mSocket = mDevices .get(position) .createRfcommSocketToServiceRecord( UUID.fromString("997f1b20-b4a0-45ea-a7dd-b2097299b1f6")); mSocket.connect();//阻塞 Toast.makeText(MainActivity.this, "连接成功", Toast.LENGTH_SHORT).show(); BlueToothHandler.getInstance().setSocket(mSocket); } catch (IOException e) { e.printStackTrace(); } } }); } public class MyReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (action.equals(BluetoothAdapter.ACTION_DISCOVERY_STARTED)) { Log.i("info", "开始扫描"); } else if (action.equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)) { Log.i("info", "扫描结束"); } else if (action.equals(BluetoothDevice.ACTION_FOUND)) { BluetoothDevice device = intent .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); Log.i("info", device.getName() + ":" + device.getAddress()); if (mDevices != null) { for (int i = 0; i < mDevices.size(); i++) { if (device.getAddress() .equals(mDevices.get(i).getAddress())) { return; } } mDevices.add(device); mDeviceAdapter.notifyDataSetChanged(); } } } }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。