Android使用Bluetooth

Activity程式碼如下：

package com.example.bluetooth;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
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.WindowManager;

public class Bluetooth extends Activity {
    private BluetoothAdapter adapter;
    private final String tag = "Tag";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_bluetooth);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    }

    @Override
    protected void onResume() {
        super.onResume();
        init();
        IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
        registerReceiver(broadcastReceiver, filter);
        Log.i(tag, "註冊成功");
    }

    @Override
    protected void onPause() {
        unregisterReceiver(broadcastReceiver);
        adapter.disable();
        Log.i(tag, "解除註冊");
        super.onPause();
    }

    private void init() {
        adapter = BluetoothAdapter.getDefaultAdapter();
        if (adapter == null) {
            Log.i(tag, "本設備不支援藍牙");
        } else {
            if (!adapter.isEnabled()) {
                Log.i(tag, "藍牙尚未開啟");
                Intent intent = new Intent(
                        BluetoothAdapter.ACTION_REQUEST_ENABLE);
                startActivityForResult(intent, 1);
                Log.i(tag, "藍牙已經開啟");
            } else {
                Log.i(tag, "藍牙已經開啟");
            }
        }
    }

    private final BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String str = intent.getAction();
            Log.i(tag, intent.getAction());
            if (BluetoothDevice.ACTION_FOUND.equals(str)) {
                BluetoothDevice device = intent
                        .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            }
        }
    };

}

AndroidManifest.xml：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.bluetooth"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />
    <uses-permission android:name="android.permission.BLUETOOTH"/>
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".Bluetooth"
            android:label="@string/title_activity_bluetooth" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

參考文章：
http://developer.android.com/guide/topics/connectivity/bluetooth.html