一. 修改本機藍芽裝置的可見性

二. 掃描周圍可用的藍芽裝置

Eg:

一.  清單檔案AdroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.se7en"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
	<uses-permission android:name="android.permission.BLUETOOTH"/>
	
	<!-若需要管理藍芽裝置，如修改可見性，則需以下的許可權->
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
</manifest>
 

二. 佈局檔案: main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
	<TextView  
    	android:layout_width="fill_parent" 
    	android:layout_height="wrap_content" 
    	android:text="@string/hello"
    	/>
    <Button 
    	android:id="@+id/discoverButton"
    	android:layout_width="fill_parent"
    	android:layout_height="wrap_content"
    	android:text="設定可見性"/>
    <Button 
    	android:id="@+id/scanButton"
    	android:layout_width="fill_parent"
    	android:layout_height="wrap_content"
    	android:text="開始掃描"/>
</LinearLayout>
 

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.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {
	private Button discoverButton = null;
	private Button scanButton = null;
	private BluetoothAdapter adapter = null;
	private BluetoothReceiver bluetoothReceiver = null;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        adapter = BluetoothAdapter.getDefaultAdapter();
        
        discoverButton = (Button)findViewById(R.id.discoverButton);
        scanButton = (Button)findViewById(R.id.scanButton);
        //修改藍芽裝置的可見性
        discoverButton.setOnClickListener(new OnClickListener(){
			@Override
			public void onClick(View view) {
			Intent discoverIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);

//設定藍芽可見性，500表示可見時間（單位：秒），當值大於300時預設為300
discoverIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,500);
startActivity(discoverIntent);
			}
        });
        
        scanButton.setOnClickListener(new OnClickListener(){
			@Override
			public void onClick(View v) {
		//開始掃描周圍藍芽裝置，該方法是非同步呼叫並以廣播的機制返回，所以需要建立一個BroadcastReceiver來獲取資訊
				adapter.startDiscovery();
			}
        });
        
        //設定廣播接收的filter
        IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
        //建立藍芽廣播資訊的receiver
        bluetoothReceiver = new BluetoothReceiver ();
        //註冊廣播接收器
        registerReceiver(bluetoothReceiver,intentFilter);
        	
    }
    
    private class BluetoothReceiver extends BroadcastReceiver{
		@Override
		public void onReceive(Context context, Intent intent) {
			//獲得掃描到的遠端藍芽裝置
			BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
			System.out.println(device.getAddress());
		}
    	
    }
}