Activar/Desactivar Bluetooth

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/txtStatus"
        android:layout_width="match_parent"
        android:layout_height="wrap_content
 android:text="@string/sStatus" />

 <Button
 android:id="@+id/btnOn"
 android:layout_width="match_parent"
 android:layout_height="wrap_content
        android:text="@string/sActivar" />

    <Button
        android:id="@+id/btnOff"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"        
        android:text="@string/sDesactivar" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">TestBT</string>
    <string name="action_settings">Settings</string>
    <string name="sStatus">-</string>
    <string name="sActivar">Activar</string>
    <string name="sDesactivar">Desactivar</string>
</resources>

package com.bolivia.testbt;

import android.os.Bundle;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener{

 private Button btnOn;
 private Button btnOff;
 private TextView txtStatus;
 private BluetoothAdapter bluetoothAdapter;
 private boolean bluetooth_soportado = true;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  //--> Begin
  txtStatus = (TextView) findViewById(R.id.txtStatus);
  btnOn = (Button)findViewById(R.id.btnOn);
  btnOff = (Button)findViewById(R.id.btnOff);
  btnOn.setOnClickListener( this ); 
  btnOff.setOnClickListener( this ); 

  //se optiene dispositivo Bluetooth
  bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
  if( bluetoothAdapter == null ) {
   bluetooth_soportado=false;
   txtStatus.setText("Status: Bluetooth no soportado en este dispositivo");
  }else{
   txtStatus.setText("Status: - ");
  }
  //--> End

 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }

 @Override
 public void onClick(View v) {

  if( bluetooth_soportado ){
   switch ( v.getId() ) 
   {
    case R.id.btnOn : 
     if ( !bluetoothAdapter.isEnabled() ) {    
      Intent turnOnIntent = new Intent( BluetoothAdapter.ACTION_REQUEST_ENABLE );    
      startActivityForResult( turnOnIntent, 1 );
      txtStatus.setText("Status: Bluetooth ACTIVADO");    
     }else{    
      txtStatus.setText("Status: Bluetooth YA ESTA ACTIVADO");    
     }  
     break;
    case R.id.btnOff:
       bluetoothAdapter.disable();    
       txtStatus.setText("Status: DESACTIVADO");
     break;
   }   

  }else{
   Toast.makeText(
     getApplicationContext(),
     "Bluetooth no soportado en este dispositivo",
     Toast.LENGTH_LONG).show();
  }
 }

}

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.BLUETOOTH"/>
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>  

    <application
        android:allowBackup="true"
...