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   源码介绍

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这是一个蓝牙连接通信的demo

package com.example.bluetoothconn;

import java.util.ArrayList;
import java.util.Set;

import android.app.Activity;
import android.app.AlertDialog;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends Activity {

	static enum ServerOrCilent {
		NONE, SERVICE, CLIENT
	};

	static String BlueToothAddress = "null";
	static ServerOrCilent serviceOrCilent = ServerOrCilent.NONE;
	static boolean isOpen = false;

	private ListView mListView;
	private ArrayList<MyListItem> list;
	private Button seachButton, serviceButton, open, close;
	ListAdapter mAdapter;
	Context mContext;

	// 取得默认的蓝牙适配器
	private BluetoothAdapter mBtAdapter = BluetoothAdapter.getDefaultAdapter();
	boolean isBTOpen;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		getActionBar().setTitle("扫描到的设备");
		setContentView(R.layout.activity_main);
		mContext = this;
		init();
	}

	private void init() {
		list = new ArrayList<MyListItem>();
		mAdapter = new ListAdapter(this, list);
		mListView = (ListView) findViewById(android.R.id.list);
		mListView.setAdapter(mAdapter);
		mListView.setFastScrollEnabled(true);
		mListView.setOnItemClickListener(mDeviceClickListener);

		// Register for broadcasts when a device is discovered
		IntentFilter discoveryFilter = new IntentFilter(
				BluetoothDevice.ACTION_FOUND);
		this.registerReceiver(mReceiver, discoveryFilter);

		// Get a set of currently paired devices
		Set<BluetoothDevice> pairedDevices = mBtAdapter.getBondedDevices();

		// If there are paired devices, add each one to the ArrayAdapter
		if (pairedDevices.size() > 0) {
			for (BluetoothDevice device : pairedDevices) {
				list.add(new MyListItem(device.getName()   "\n"
						  device.getAddress(), true));
				mAdapter.notifyDataSetChanged();
				mListView.setSelection(list.size() - 1);
			}
		} else {
			list.add(new MyListItem("没有设备已经配对", true));
			mAdapter.notifyDataSetChanged();
			mListView.setSelection(list.size() - 1);
		}

		open = (Button) findViewById(R.id.open);
		open.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				isBTOpen = mBtAdapter.isEnabled();
				if (!isBTOpen) {
					boolean open = mBtAdapter.enable();
					if (open) {
						Toast.makeText(MainActivity.this, "蓝牙已打开", 1000).show();
					} else {
						Toast.makeText(MainActivity.this, "打开蓝牙失败", 1000)
								.show();
					}
				} else {
					Toast.makeText(MainActivity.this, "蓝牙已经处于开启状态，不需要再打开了",
							1000).show();
				}
			}
		});

		close = (Button) findViewById(R.id.close);
		close.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				isBTOpen = mBtAdapter.isEnabled();
				if (isBTOpen) {
					boolean close = mBtAdapter.disable();
					if (close) {
						Toast.makeText(MainActivity.this, "蓝牙已关闭", 1000).show();
					} else {
						Toast.makeText(MainActivity.this, "关闭蓝牙失败", 1000)
								.show();
					}
				} else {
					Toast.makeText(MainActivity.this, "蓝牙已经处于关闭状态，不需要再关闭了",
							1000).show();
				}
			}
		});

		serviceButton = (Button) findViewById(R.id.startService);
		serviceButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				isBTOpen = mBtAdapter.isEnabled();
				if (isBTOpen) {
					serviceOrCilent = ServerOrCilent.SERVICE;
					Intent intent = new Intent();
					intent.setClass(MainActivity.this, ChatActivity.class);
					startActivity(intent);
				} else {
					Toast.makeText(MainActivity.this,
							"蓝牙未开启，无法开启服务，请先开启蓝牙再开启服务。", 1000).show();
				}
			}
		});

		seachButton = (Button) findViewById(R.id.startSearch);
		seachButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				isBTOpen = mBtAdapter.isEnabled();
				if (isBTOpen) {
					if (mBtAdapter.isDiscovering()) {
						mBtAdapter.cancelDiscovery();
						seachButton.setText("重新搜索");
					} else {
						list.clear();
						mAdapter.notifyDataSetChanged();

						Set<BluetoothDevice> pairedDevices = mBtAdapter
								.getBondedDevices();
						if (pairedDevices.size() > 0) {
							for (BluetoothDevice device : pairedDevices) {
								list.add(new MyListItem(device.getName()   "\n"
										  device.getAddress(), true));
								mAdapter.notifyDataSetChanged();
								mListView.setSelection(list.size() - 1);
							}
						} else {
							list.add(new MyListItem(
									"No devices have been paired", true));
							mAdapter.notifyDataSetChanged();
							mListView.setSelection(list.size() - 1);
						}
						// 开始搜索
						mBtAdapter.startDiscovery();
						seachButton.setText("停止搜索");
					}
				} else {
					Toast.makeText(MainActivity.this, "蓝牙处于关闭状态，请开启蓝牙再进行搜索",
							1000).show();
				}
			}
		});
	}

	private OnItemClickListener mDeviceClickListener = new OnItemClickListener() {
		public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
			MyListItem item = list.get(arg2);
			String info = item.message;
			String address = info.substring(info.length() - 17);
			BlueToothAddress = address;

			AlertDialog.Builder StopDialog = new AlertDialog.Builder(mContext);
			StopDialog.setTitle("连接");// 标题
			StopDialog.setMessage(item.message);
			StopDialog.setPositiveButton("连接",
					new DialogInterface.OnClickListener() {
						public void onClick(DialogInterface dialog, int which) {
							// TODO Auto-generated method stub
							isBTOpen = mBtAdapter.isEnabled();
							if (isBTOpen) {
								mBtAdapter.cancelDiscovery();
								seachButton.setText("重新搜索");
								serviceOrCilent = ServerOrCilent.CLIENT;
								Intent intent = new Intent();
								intent.setClass(MainActivity.this,
										ChatActivity.class);
								startActivity(intent);
							} else {
								Toast.makeText(MainActivity.this,
										"蓝牙未打开，无法连接至服务端，请先打开蓝牙再进行连接", 1000)
										.show();
							}

						}
					});
			StopDialog.setNegativeButton("取消",
					new DialogInterface.OnClickListener() {
						public void onClick(DialogInterface dialog, int which) {
							BlueToothAddress = null;
						}
					});
			StopDialog.show();
		}
	};

	private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
		@Override
		public void onReceive(Context context, Intent intent) {
			String action = intent.getAction();

			// When discovery finds a device
			if (BluetoothDevice.ACTION_FOUND.equals(action)) {
				// Get the BluetoothDevice object from the Intent
				BluetoothDevice device = intent
						.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
				// If it's already paired, skip it, because it's been listed
				// already
				if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
					list.add(new MyListItem(device.getName()   "\n"
							  device.getAddress(), false));
					mAdapter.notifyDataSetChanged();
					mListView.setSelection(list.size() - 1);
				}
				// When discovery is finished, change the Activity title
			} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED
					.equals(action)) {
				setProgressBarIndeterminateVisibility(false);
				if (mListView.getCount() == 0) {
					list.add(new MyListItem("没有发现蓝牙设备", false));
					mAdapter.notifyDataSetChanged();
					mListView.setSelection(list.size() - 1);
				}
				seachButton.setText("重新搜索");
			}
		}
	};

	@Override
	protected void onDestroy() {
		super.onDestroy();

		// Make sure we're not doing discovery anymore
		if (mBtAdapter != null) {
			mBtAdapter.cancelDiscovery();
		}
		// Unregister broadcast listeners

	}
}