title: how to get gravity sensor information?
body: <p>i'm trying to write an app for testing sensors by my Nexus S.</p>
  
  <p>well , i wrote this to show the sensors lists through a listview.</p>
  
  <pre><code>@Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
  
          //get all sensors
          sensorManager = (SensorManager) this.getSystemService(SENSOR_SERVICE);
          sensors = sensorManager.getSensorList(Sensor.TYPE_ALL);
  
          setContentView(R.layout.main);
  
          sensorListView = (ListView) findViewById(R.id.sensor_listview);
          sensorListView.setOnItemClickListener(new OnItemClickListener() {
              public void onItemClick(AdapterView&lt;?&gt; arg0, View arg1, int position,
                      long arg3) {
                  showSensorInfo(sensors.get(position).getType());
              }
          });
  
  
  
          //set an empty adapter for ListView
          sensorNames = new ArrayAdapter&lt;String&gt;(getApplicationContext(),
                  android.R.layout.simple_list_item_1);
  
  
          for (Sensor s : sensors) {
              sensorNames.add(s.getName());
              Log.i("sensor", s.getName());
          }
          sensorListView.setAdapter(sensorNames);
      }
  </code></pre>
  
  <p>i saw this ~
  <img src="https://i.stack.imgur.com/oRfAc.png" alt="enter image description here"></p>
  
  <p>there is a sensor called 「Gravity Sensor」,</p>
  
  <p>my question is , there are sensors CONSTANT such as : </p>
  
  <p>Sensor.TYPE_ACCELEROMETER</p>
  
  <p>Sensor.TYPE_GYROSCOPE</p>
  
  <p>Sensor.TYPE_LIGHT
  ..
  .</p>
  
  <p>and so on .But i couldn't find a CONSTANT called  「Sensor.TYPE_GRAVITY」</p>
  
  <p>where is the Gravity Sensor from =..=a?? ( i'm a really newbie~ )</p>