Android(安卓)蓝牙自动连接实现

Android连接蓝牙设备一般有这几个步奏

1、注册蓝牙相关的广播

        IntentFilter intent = new IntentFilter();         intent.addAction(BluetoothDevice.ACTION_FOUND);// 用BroadcastReceiver来取得搜索结果         intent.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);         intent.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);         intent.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);         registerReceiver(searchDevices, intent);

2、搜索蓝牙设备

     BluetoothAdapter.getDefaultAdapter().startDiscovery();

3、配对

btDev.createBond();

4、建立连接

    private void connect(BluetoothDevice btDev) {         UUID uuid = UUID.fromString(SPP_UUID);         try {            // btSocket = btDev.createRfcommSocketToServiceRecord(uuid);             btSocket =(BluetoothSocket) btDev.getClass().getMethod("createRfcommSocket", new Class[] {int.class}).invoke(btDev,1);            Log.d("BlueToothTestActivity", "开始连接...");             btSocket.connect();         } catch (IOException e) {             // TODO Auto-generated catch block             Log.e("BlueToothTestActivity", "开始连接......链接失败");             e.printStackTrace();         } catch (IllegalAccessException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IllegalArgumentException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (InvocationTargetException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (NoSuchMethodException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }     }

此处不抛出异常即可连接成功

完整代码：

package com.example.bluetoothtest;import java.io.IOException;import java.lang.reflect.InvocationTargetException;import java.util.ArrayList;import java.util.List;import java.util.UUID;import android.annotation.SuppressLint;import android.app.Activity;import android.bluetooth.BluetoothAdapter;import android.bluetooth.BluetoothDevice;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.ArrayAdapter;import android.widget.Button;import android.widget.ListView;import android.widget.Toast;import android.widget.ToggleButton;/** * @author Ken * @date 2016年4月20日 下午3:33:35 */public class BlueToothTestActivity extends Activity {     //该UUID表示串口服务     static final String SPP_UUID = "00000000-0000-1000-8000-00805F9B34FB";     Button btnSearch, btnDis, btnExit,spilt;     ToggleButton tbtnSwitch;     ListView lvBTDevices;     ArrayAdapter adtDevices;     List lstDevices = new ArrayList();     BluetoothAdapter btAdapt;     public static BluetoothSocket btSocket;     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState); //        if (VERSION.SDK_INT >= VERSION_CODES.KITKAT) {//            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);//            getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);//        }        setContentView(R.layout.activity_main);         // Button 设置         btnSearch = (Button) this.findViewById(R.id.btnSearch);         btnSearch.setOnClickListener(new ClickEvent());         btnExit = (Button) this.findViewById(R.id.btnExit);         btnExit.setOnClickListener(new ClickEvent());         btnDis = (Button) this.findViewById(R.id.btnDis);         btnDis.setOnClickListener(new ClickEvent()); //        // ToogleButton设置         tbtnSwitch = (ToggleButton) this.findViewById(R.id.tbtnSwitch);         tbtnSwitch.setOnClickListener(new ClickEvent());         spilt = (Button)this.findViewById(R.id.spilt);        spilt.setOnClickListener(new ClickEvent()); //        // ListView及其数据源 适配器         lvBTDevices = (ListView) this.findViewById(R.id.lvDevices);         adtDevices = new ArrayAdapter(this,                 android.R.layout.simple_list_item_1, lstDevices);         lvBTDevices.setAdapter(adtDevices);         lvBTDevices.setOnItemClickListener(new ItemClickEvent());         btAdapt = BluetoothAdapter.getDefaultAdapter();// 初始化本机蓝牙功能         if (btAdapt.isEnabled()) {             tbtnSwitch.setChecked(false);         } else {             tbtnSwitch.setChecked(true);         }         // ============================================================         // 注册Receiver来获取蓝牙设备相关的结果         IntentFilter intent = new IntentFilter();         intent.addAction(BluetoothDevice.ACTION_FOUND);// 用BroadcastReceiver来取得搜索结果         intent.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);         intent.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);         intent.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);         registerReceiver(searchDevices, intent);     }     private BroadcastReceiver searchDevices = new BroadcastReceiver() {         public void onReceive(Context context, Intent intent) {             String action = intent.getAction();             Bundle b = intent.getExtras();             Object[] lstName = b.keySet().toArray();             // 显示所有收到的消息及其细节             for (int i = 0; i < lstName.length; i++) {                 String keyName = lstName[i].toString();                 Log.e(keyName, String.valueOf(b.get(keyName)));             }             BluetoothDevice device = null;             // 搜索设备时，取得设备的MAC地址             if (BluetoothDevice.ACTION_FOUND.equals(action)) {                 device = intent                         .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);                 if (device.getBondState() == BluetoothDevice.BOND_NONE) {                     String str = "未配对|" + device.getName() + "|"                             + device.getAddress();                     if (lstDevices.indexOf(str) == -1)// 防止重复添加                         lstDevices.add(str); // 获取设备名称和mac地址                     adtDevices.notifyDataSetChanged();                 }             }else if(BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)){                 device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);                 switch (device.getBondState()) {                 case BluetoothDevice.BOND_BONDING:                     Log.d("BlueToothTestActivity", "正在配对......");                     break;                 case BluetoothDevice.BOND_BONDED:                     Log.d("BlueToothTestActivity", "完成配对");                     connect(device);//连接设备                     break;                 case BluetoothDevice.BOND_NONE:                     Log.d("BlueToothTestActivity", "取消配对");                 default:                     break;                 }             }         }     };     @Override     protected void onDestroy() {         this.unregisterReceiver(searchDevices);         super.onDestroy();         android.os.Process.killProcess(android.os.Process.myPid());     }     class ItemClickEvent implements AdapterView.OnItemClickListener {         @SuppressLint("NewApi") @Override         public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,                 long arg3) {             if(btAdapt.isDiscovering())btAdapt.cancelDiscovery();             String str = lstDevices.get(arg2);             String[] values = str.split("\\|");             String address = values[2];             Log.e("BlueToothTestActivity", "address :"+values[2]);             BluetoothDevice btDev = btAdapt.getRemoteDevice(address);             try {                 Boolean returnValue = false;                 if (btDev.getBondState() == BluetoothDevice.BOND_NONE) {                     btDev.createBond();                }else if(btDev.getBondState() == BluetoothDevice.BOND_BONDED){                     connect(btDev);                 }             } catch (Exception e) {                 e.printStackTrace();             }         }     }     private void connect(BluetoothDevice btDev) {         UUID uuid = UUID.fromString(SPP_UUID);         try {            // btSocket = btDev.createRfcommSocketToServiceRecord(uuid);             btSocket =(BluetoothSocket) btDev.getClass().getMethod("createRfcommSocket", new Class[] {int.class}).invoke(btDev,1);            Log.d("BlueToothTestActivity", "开始连接...");             btSocket.connect();         } catch (IOException e) {             // TODO Auto-generated catch block             Log.e("BlueToothTestActivity", "开始连接......链接失败");             e.printStackTrace();         } catch (IllegalAccessException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IllegalArgumentException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (InvocationTargetException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (NoSuchMethodException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }     }     class ClickEvent implements View.OnClickListener {         @Override         public void onClick(View v) {             if (v == btnSearch)// 搜索蓝牙设备，在BroadcastReceiver显示结果             {                 if (btAdapt.getState() == BluetoothAdapter.STATE_OFF) {// 如果蓝牙还没开启                     Toast.makeText(BlueToothTestActivity.this, "请先打开蓝牙", 1000)                             .show();                     return;                 }                 if (btAdapt.isDiscovering())                     btAdapt.cancelDiscovery();                 lstDevices.clear();                 Object[] lstDevice = btAdapt.getBondedDevices().toArray();                 for (int i = 0; i < lstDevice.length; i++) {                     BluetoothDevice device = (BluetoothDevice) lstDevice[i];                     String str = "已配对|" + device.getName() + "|"                             + device.getAddress();                     lstDevices.add(str); // 获取设备名称和mac地址                     adtDevices.notifyDataSetChanged();                 }                 setTitle("本机蓝牙地址：" + btAdapt.getAddress());                 btAdapt.startDiscovery();             } else if (v == tbtnSwitch) {// 本机蓝牙启动/关闭                 if (tbtnSwitch.isChecked() == false)                     btAdapt.enable();                 else if (tbtnSwitch.isChecked() == true)                     btAdapt.disable();             } else if (v == btnDis)// 本机可以被搜索             {                 Intent discoverableIntent = new Intent(                         BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);                 discoverableIntent.putExtra(                         BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);                 startActivity(discoverableIntent);             } else if (v == btnExit) {                 try {                     if (btSocket != null)                         btSocket.close();                 } catch (IOException e) {                     e.printStackTrace();                 }                 BlueToothTestActivity.this.finish();             }         }     }     private void autoConnect(String address){        if(btAdapt.isDiscovering())btAdapt.cancelDiscovery();         BluetoothDevice btDev = btAdapt.getRemoteDevice(address);         try {             if (btDev.getBondState() == BluetoothDevice.BOND_NONE) {                 btDev.createBond();            }else if(btDev.getBondState() == BluetoothDevice.BOND_BONDED){                 connect(btDev);             }         } catch (Exception e) {             e.printStackTrace();         }     }}

自动连接就只需要调用autoConnect(String address),具体的address就在BluetoothDevice.ACTION_FOUND广播中获取的。

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