一.  清单文件AdroidManifest.xml:

<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"/>

 

二. 布局文件: main.xml:

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<?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. */
@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);
//修改蓝牙设备的可见性
discoverButton.setOnClickListener(new OnClickListener(){
@Override
public 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(){
@Override
public 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filter
IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
//创建蓝牙广播信息的receiver
bluetoothReceiver = new BluetoothReceiver ();
//注册广播接收器
registerReceiver(bluetoothReceiver,intentFilter);

}

private class BluetoothReceiver extends BroadcastReceiver{
@Override
public 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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