<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 android:layout_width="fill_parent" 
 android:layout_height="fill_parent" android:orientation="vertical">
 <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:text="TextView" android:layout_height="wrap_content"></TextView> 
 <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/linearLayout1"> 
  <Button android:id="@+id/button1" android:text="OFF" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> 
 </LinearLayout> 
 <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/linearLayout2"> 
  <Button android:id="@+id/button2" android:text="开启可见 " android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> 
  <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="设备不可见 "></TextView> 
 </LinearLayout> 
 <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/linearLayout3"> 
  <Button android:id="@+id/button3" android:text="扫描:OFF" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button> 
  <TextView android:id="@+id/textView3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="停止扫描 "></TextView> 
 </LinearLayout> 
 <ListView android:id="@+id/listView1" android:layout_height="wrap_content" android:layout_width="match_parent"></ListView> 
</LinearLayout>

package com.test_bluetooth; 
import java.util.Set; 
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.os.CountDownTimer; 
import android.view.View; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.ListView; 
import android.widget.TextView; 
public class test_bluetooth extends Activity implements View.OnClickListener 
{ 
 private static final int REQUEST_ENABLE_BT = 2; 
 TextView txt; 
 TextView txt_see; 
 TextView txt_scan; 
 BluetoothAdapter mBluetoothAdapter; 
 ArrayAdapter<String> mArrayAdapter; 
 Button btn_switch; 
 Button btn_see; 
 Button btn_scan; 
 ListView list; 
 CountDownTimer see_timer; 
 CountDownTimer scan_timer; 
 /** Called when the activity is first created. */ 
 @Override 
 public void onCreate(Bundle savedInstanceState) 
 { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.main); 
  txt = (TextView)findViewById(R.id.textView1); 
  txt_see = (TextView)findViewById(R.id.textView2); 
  txt_scan = (TextView)findViewById(R.id.textView3); 
  //绑定XML中的ListView，作为Item的容器 
  list = (ListView) findViewById(R.id.listView1); 
  //获取蓝牙适配器 
  mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); 
  mArrayAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1);
  if (mBluetoothAdapter == null) 
  { 
   // Device does not support Bluetooth 
   txt.setText("fail"); 
   //退出程序 
   test_bluetooth.this.finish(); 
  } 
  btn_switch = (Button)findViewById(R.id.button1); 
  btn_switch.setOnClickListener(this); 
  btn_see = (Button)findViewById(R.id.button2); 
  btn_see.setOnClickListener(this); 
  btn_see.setEnabled(false);  
  btn_scan = (Button)findViewById(R.id.button3); 
  btn_scan.setOnClickListener(this); 
  btn_scan.setText("扫描:OFF"); 
  btn_scan.setEnabled(false); 
  //判断蓝牙是否已经被打开 
  if (mBluetoothAdapter.isEnabled()) 
  { 
   //打开 
   btn_switch.setText("ON"); 
   btn_see.setEnabled(true); 
   btn_scan.setEnabled(true); 
  } 
  see_timer = new CountDownTimer(120000,1000) 
  { 
   @Override 
   public void onTick( long millisUntilFinished) 
   { 
    txt_see.setText( "剩余可见时间" + millisUntilFinished / 1000 + "秒"); 
   }   
   @Override 
   public void onFinish() 
   { 
    //判断蓝牙是否已经被打开 
    if (mBluetoothAdapter.isEnabled()) 
    { 
     btn_see.setEnabled(true); 
     txt_see.setText( "设备不可见"); 
    } 
   } 
  }; 
  scan_timer = new CountDownTimer(12000,1000) 
  { 
   @Override 
   public void onTick( long millisUntilFinished) 
   { 
    txt_scan.setText( "剩余扫描时间" + millisUntilFinished / 1000 + "秒"); 
   }   
   @Override 
   public void onFinish() 
   { 
    //判断蓝牙是否已经被打开 
    if (mBluetoothAdapter.isEnabled()) 
    { 
     btn_scan.setEnabled(true); 
     //关闭扫描 
     mBluetoothAdapter.cancelDiscovery(); 
     btn_scan.setText("扫描:OFF"); 
     txt_scan.setText( "停止扫描"); 
    } 
   } 
  }; 
 } 
 @Override 
 protected void onDestroy() { 
  super.onDestroy(); 
  android.os.Process.killProcess(android.os.Process.myPid()); 
 } 
 @Override 
 public void onClick(View v) 
 { 
  // TODO Auto-generated method stub 
  switch (v.getId()) 
  { 
  case R.id.button1: 
   { 
    String str = btn_switch.getText().toString(); 
    if (str == "OFF") 
    { 
     if (!mBluetoothAdapter.isEnabled()) 
     { 
      //打开蓝牙 
      Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); 
      startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT); 
      txt.setText("s1"); 
      btn_see.setEnabled(true); 
      btn_scan.setText("扫描:OFF"); 
      btn_scan.setEnabled(true); 
     } 
    } 
    else 
    { 
     //关闭蓝牙 
     mBluetoothAdapter.disable(); 
     btn_switch.setText("OFF"); 
     mArrayAdapter.clear(); 
     list.setAdapter(mArrayAdapter); 
     btn_see.setEnabled(false); 
     btn_scan.setEnabled(false); 
    } 
    break; 
   } 
  case R.id.button2: 
  { 
   //开启可见 
   Intent enableBtIntent_See = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); 
   startActivityForResult(enableBtIntent_See, 3); 
   txt.setText("s1"); 
   btn_see.setEnabled(false); 
   see_timer.start(); 
   break; 
  } 
  case R.id.button3: 
  { 
   String str = btn_scan.getText().toString(); 
   if (str == "扫描:OFF") 
   { 
    txt.setText("s5"); 
    if (mBluetoothAdapter.isEnabled()) 
    { 
     //开始扫描 
     mBluetoothAdapter.startDiscovery(); 
     txt.setText("s6"); 
     btn_scan.setText("扫描:ON"); 
     // Create a BroadcastReceiver for ACTION_FOUND 
     final BroadcastReceiver mReceiver = new BroadcastReceiver() 
     { 
      @Override 
      public void onReceive(Context context, Intent intent) 
      { 
       // TODO Auto-generated method stub 
       String action = intent.getAction(); 
       // When discovery finds a device 
       mArrayAdapter.clear(); 
       if (BluetoothDevice.ACTION_FOUND.equals(action)) 
       { 
        // Get the BluetoothDevice object from the Intent 
        BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); 
        // Add the name and address to an array adapter to show in a ListView 
        mArrayAdapter.add(device.getName() + ":" + device.getAddress()); 
       } 
       list.setAdapter(mArrayAdapter); 
      } 
     }; 
     // Register the BroadcastReceiver 
     IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND); 
     registerReceiver(mReceiver, filter); // Don't forget to unregister during onDestroy 
     scan_timer.start(); 
    } 
   } 
   else 
   { 
    //关闭扫描 
    mBluetoothAdapter.cancelDiscovery(); 
    btn_scan.setText("扫描:OFF"); 
    scan_timer.cancel(); 
    txt_scan.setText( "停止扫描"); 
   } 
   break; 
  } 
  default: 
   break; 
  } 
 } 
 public void onActivityResult(int requestCode, int resultCode, Intent data) 
 { 
  switch (requestCode) 
  { 
  case REQUEST_ENABLE_BT: 
   // When the request to enable Bluetooth returns 
   if (resultCode == Activity.RESULT_OK) 
   { 
    // Bluetooth is now enabled, so set up a chat session 
    btn_switch.setText("ON"); 
    txt.setText("s4"); 
    //获取蓝牙列表 
    Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices(); 
    mArrayAdapter.clear(); 
    // If there are paired devices 
    if (pairedDevices.size() > 0) 
    { 
     //txt.setText("s3"); 
     // Loop through paired devices 
     for (BluetoothDevice device : pairedDevices) 
     { 
      // Add the name and address to an array adapter to show in a ListView 
      mArrayAdapter.add(device.getName() + ":" + device.getAddress()); 
     } 
     list.setAdapter(mArrayAdapter); 
     } 
   } else 
   { 
    finish(); 
   } 
  } 
 } 
}