android開發之藍牙主動配對連接手機

上一篇介紹了手機配對連接的三種方式，這篇以完整的一個代碼實例介紹如何搜索周圍的藍牙設備，以及主動配對，連接。

package jason.com;

import java.io.IOException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

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;

public class BlueToothTestActivity extends Activity {
	//該UUID表示串口服務
	static final String SPP_UUID = "00001101-0000-1000-8000-00805F9B34FB";
	Button btnSearch, btnDis, btnExit;
	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);
		setContentView(R.layout.main);
		// Button 設置
		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設置
		tbtnSwitch = (ToggleButton) this.findViewById(R.id.tbtnSwitch);
		tbtnSwitch.setOnClickListener(new ClickEvent());

		// ListView及其數據源 適配器
		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();// 初始化本機藍牙功能

		// ========================================================
		// modified by jason0539 搜索jason0539進入我的博客
		/*
		 * if (btAdapt.getState() == BluetoothAdapter.STATE_OFF)// 讀取藍牙狀態並顯示
		 * tbtnSwitch.setChecked(false); else if (btAdapt.getState() ==
		 * BluetoothAdapter.STATE_ON) tbtnSwitch.setChecked(true);
		 */
		if (btAdapt.isEnabled()) {
			tbtnSwitch.setChecked(false);
		} else {
			tbtnSwitch.setChecked(true);
		}
		// ============================================================
		// 注冊Receiver來獲取藍牙設備相關的結果
		IntentFilter intent = new IntentFilter();
		intent.addAction(BluetoothDevice.ACTION_FOUND);// 用BroadcastReceiver來取得搜索結果
		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();

			// 顯示所有收到的消息及其細節
			for (int i = 0; i < lstName.length; i++) {
				String keyName = lstName[i].toString();
				Log.e(keyName, String.valueOf(b.get(keyName)));
			}
			BluetoothDevice device = null;
			// 搜索設備時，取得設備的MAC地址
			if (BluetoothDevice.ACTION_FOUND.equals(action)) {
				device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
				if (device.getBondState() == BluetoothDevice.BOND_NONE) {
					String str = "未配對|" + device.getName() + "|"
							+ device.getAddress();
					if (lstDevices.indexOf(str) == -1)// 防止重復添加
						lstDevices.add(str); // 獲取設備名稱和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", "正在配對......");
					break;
				case BluetoothDevice.BOND_BONDED:
					Log.d("BlueToothTestActivity", "完成配對");
					connect(device);//連接設備
					break;
				case BluetoothDevice.BOND_NONE:
					Log.d("BlueToothTestActivity", "取消配對");
				default:
					break;
				}
			}
			
		}
	};

	@Override
	protected void onDestroy() {
		this.unregisterReceiver(searchDevices);
		super.onDestroy();
		android.os.Process.killProcess(android.os.Process.myPid());
	}

	class ItemClickEvent implements AdapterView.OnItemClickListener {

		@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("address", values[2]);
			BluetoothDevice btDev = btAdapt.getRemoteDevice(address);
			try {
				Boolean returnValue = false;
				if (btDev.getBondState() == BluetoothDevice.BOND_NONE) {
					//利用反射方法調用BluetoothDevice.createBond(BluetoothDevice remoteDevice);
					Method createBondMethod = BluetoothDevice.class
							.getMethod("createBond");
					Log.d("BlueToothTestActivity", "開始配對");
					returnValue = (Boolean) createBondMethod.invoke(btDev);
					
				}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);
			Log.d("BlueToothTestActivity", "開始連接...");
			btSocket.connect();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	class ClickEvent implements View.OnClickListener {
		@Override
		public void onClick(View v) {
			if (v == btnSearch)// 搜索藍牙設備，在BroadcastReceiver顯示結果
			{
				if (btAdapt.getState() == BluetoothAdapter.STATE_OFF) {// 如果藍牙還沒開啟
					Toast.makeText(BlueToothTestActivity.this, "請先打開藍牙", 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 = "已配對|" + device.getName() + "|"
							+ device.getAddress();
					lstDevices.add(str); // 獲取設備名稱和mac地址
					adtDevices.notifyDataSetChanged();
				}
				setTitle("本機藍牙地址：" + btAdapt.getAddress());
				btAdapt.startDiscovery();
			} else if (v == tbtnSwitch) {// 本機藍牙啟動/關閉
				if (tbtnSwitch.isChecked() == false)
					btAdapt.enable();

				else if (tbtnSwitch.isChecked() == true)
					btAdapt.disable();
			} else if (v == btnDis)// 本機可以被搜索
			{
				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();
			}
		}

	}
}