AccessGyroscope.java

import android.app.Activity;
    import android.hardware.Sensor;
    import android.hardware.SensorEvent;
    import android.hardware.SensorEventListener;
    import android.hardware.SensorManager;
    import android.os.Bundle;
    import android.widget.TextView;

    public class AccessGyroscope extends Activity implements SensorEventListener
    {
        //a TextView
        private TextView tv;
        //the Sensor Manager
        private SensorManager sManager;

        /** Called when the activity is first created. */
        @Override
        public void onCreate(Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);

            //get the TextView from the layout file
            tv = (TextView) findViewById(R.id.tv);

            //get a hook to the sensor service
            sManager = (SensorManager) getSystemService(SENSOR_SERVICE);
        }
so
        //when this Activity starts
        @Override
        protected void onResume()
        {
            super.onResume();
        /*register the sensor listener to listen to the gyroscope sensor, use the
        callbacks defined in this class, and gather the sensor information as quick
        as possible*/
            sManager.registerListener(this, sManager.getDefaultSensor(Sensor.TYPE_ORIENTATION),SensorManager.SENSOR_DELAY_FASTEST);
        }

        //When this Activity isn't visible anymore
        @Override
        protected void onStop()
        {
            //unregister the sensor listener
            sManager.unregisterListener(this);
            super.onStop();
        }

        @Override
        public void onAccuracyChanged(Sensor arg0, int arg1)
        {
            //Do nothing.
        }

        @Override
        public void onSensorChanged(SensorEvent event)
        {
            //if sensor is unreliable, return void
            if (event.accuracy == SensorManager.SENSOR_STATUS_UNRELIABLE)
            {
                return;
            }

            //else it will output the Roll, Pitch and Yawn values
            tv.setText("Orientation X (Roll) :"+ Float.toString(event.values[2]) +"\n"+
                    "Orientation Y (Pitch) :"+ Float.toString(event.values[1]) +"\n"+
                    "Orientation Z (Yaw) :"+ Float.toString(event.values[0]));
        }
    }
}