本文主要是介绍Android开发之蓝牙(Bluetooth)操作(二)--修改本机蓝牙设备的可见性,并扫描周围可用的蓝牙设备，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
一. 修改本机蓝牙设备的可见性
二. 扫描周围可用的蓝牙设备
Eg:
一. 清单文件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"/><!-若需要管理蓝牙设备，如修改可见性，则需以下的权限-><uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
</manifest>二. 布局文件: 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="设置可见性"/><Button android:id="@+id/scanButton"android:layout_width="fill_parent"android:layout_height="wrap_content"android:text="开始扫描"/>
</LinearLayout>三. MainActivity:
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. */@Overridepublic 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);//修改蓝牙设备的可见性discoverButton.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View view) {Intent discoverIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);//设置蓝牙可见性，500表示可见时间（单位：秒），当值大于300时默认为300
discoverIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,500);
startActivity(discoverIntent);}});scanButton.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v) {//开始扫描周围蓝牙设备，该方法是异步调用并以广播的机制返回，所以需要创建一个BroadcastReceiver来获取信息adapter.startDiscovery();}});//设定广播接收的filterIntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);//创建蓝牙广播信息的receiverbluetoothReceiver = new BluetoothReceiver ();//注册广播接收器registerReceiver(bluetoothReceiver,intentFilter);}private class BluetoothReceiver extends BroadcastReceiver{@Overridepublic void onReceive(Context context, Intent intent) {//获得扫描到的远程蓝牙设备BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);System.out.println(device.getAddress());}}
}
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