title: Check if bluetooth is enabled using an Android application
body: <p>I want to check if bluetooth is enabled in a device using an Android application.
  I used the .isEnabled method. But there is an error. I found out (by commenting lines) that the error is in .isEnabled method. Can you pls help me to figure this out?</p>
  
  <pre><code>final BluetoothAdapter bluetooth = BluetoothAdapter.getDefaultAdapter();
  
  submitButton.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
          String status = "Bluetooth";
  
          if(bluetooth != null) {
              if (bluetooth.isEnabled()) {
                  String mydeviceaddress = bluetooth.getAddress();
                  String mydevicename = bluetooth.getName();
                  status = ("Address "+ mydeviceaddress + " Name" + mydevicename);
                  Toast.makeText(getApplicationContext(), "" + status + "", Toast.LENGTH_LONG).show();
              } else {
                  status = ("Bluetooth not enabled");
                  Toast.makeText(getApplicationContext(), "" + status + "", Toast.LENGTH_LONG).show();
              }
          } else {
              Toast.makeText(getApplicationContext(), "" + status + "", Toast.LENGTH_LONG).show();
          }
      }
  }
  </code></pre>