title: E/BluetoothAdapter(883): Bluetooth binder is null
body: <p><strong>ANSWER</strong>:<a href="https://stackoverflow.com/questions/2175076/how-to-use-bluetooth-in-android-emulator">How to use Bluetooth in Android emulator?</a></p>
  
  <p>I have tried to enable disable bluetooth device. For this reason, I have wrote below code but it gives the error, which is also at below.</p>
  
  <pre><code>if ( bluetoothAdmin == null ) {
  
      return ;
  }
  if ( bluetooth . isEnabled()){
      bluetooth . disable ();
  }
  else {
      bluetooth . enable();
  }
  </code></pre>
  
  <p>in on create</p>
  
  <pre><code>BLuetoothAdapter bluetooth = BluetoothAdapter.getDefaultAdapter() ;
  </code></pre>
  
  <p>in manisfest</p>
  
  <pre><code>&lt;uses-permission
      android:name="android.permission.BLUETOOTH" 
  /&gt;
  &lt;uses-permission
      android:name="android.permission.BLUETOOTH_ADMIN" 
  /&gt;
  </code></pre>
  
  <p>error :</p>
  
  <pre><code>01-23 07:18:53.167: E/BluetoothAdapter(883): Bluetooth binder is null
  </code></pre>
  
  <p>half of the stack:</p>
  
  <pre><code>01-23 07:36:55.624: E/SurfaceFlinger(36): ro.sf.lcd_density must be defined as a build property
  01-23 07:37:16.954: E/ActivityThread(642): Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40d51230 that was originally bound here
  01-23 07:37:16.954: E/ActivityThread(642): android.app.ServiceConnectionLeaked: Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40d51230 that was originally bound here
  01-23 07:37:16.954: E/ActivityThread(642):  at android.app.LoadedApk$ServiceDispatcher.&lt;init&gt;(LoadedApk.java:969)
  01-23 07:37:16.954: E/ActivityThread(642):  at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:863)
  01-23 07:37:16.954: E/ActivityThread(642):  at android.app.ContextImpl.bindService(ContextImpl.java:1418)
  01-23 07:37:16.954: E/ActivityThread(642):  at android.app.ContextImpl.bindService(ContextImpl.java:1407)
  01-23 07:37:16.954: E/ActivityThread(642):  at android.content.ContextWrapper.bindService(ContextWrapper.java:473)
  01-23 07:37:16.954: E/ActivityThread(642):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:157)
  01-23 07:37:16.954: E/ActivityThread(642):  at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:145)
  01-23 07:37:16.954: E/ActivityThread(642):  at com.android.emailcommon.service.AccountServiceProxy.getDeviceId(AccountServiceProxy.java:11    6)
  01-23 07:37:16.954: E/ActivityThread(642):  at com.android.exchange.ExchangeService.getDeviceId(ExchangeService.java:1249)
  01-23 07:37:16.954: E/ActivityThread(642):  at com.android.exchange.ExchangeService$7.run(ExchangeService.java:1856)
  01-23 07:37:16.954: E/ActivityThread(642):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:551)
  01-23 07:37:16.954: E/ActivityThread(642):  at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:549)
  01-23 07:37:16.954: E/ActivityThread(642):  at android.os.AsyncTask$2.call(AsyncTask.java:287)
  01-23 07:37:16.954: E/ActivityThread(642):  at java.util.concurrent.FutureTask.run(FutureTask.java:234)
  01-23 07:37:16.954: E/ActivityThread(642):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
  01-23 07:37:16.954: E/ActivityThread(642):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
  01-23 07:37:16.954: E/ActivityThread(642):  at java.lang.Thread.run(Thread.java:856)
  01-23 07:37:16.964: E/StrictMode(642): null
  01-23 07:37:16.964: E/StrictMode(642): android.app.ServiceConnectionLeaked: Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@40d51230 that was originally bound here
  </code></pre>
  
  <p>I am testing on the Android emulator</p>