public class AndroidUIActivity extends Activity {
/** Called when the activity is first created. */

private SensorManager sms;
private CheckBox gravity,light,orientation;
private Button check;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
/*获取UI小组件*/
gravity = (CheckBox) this.findViewById(R.id.gravity);
light = (CheckBox) this.findViewById(R.id.light);
orientation = (CheckBox) this.findViewById(R.id.orientation);
check=(Button) this.findViewById(R.id.check);

/*获取系统的传感器管理服务*/
sms = (SensorManager) getSystemService(Context.SENSOR_SERVICE);

check.setOnClickListener(new OnClickListener(){

@Override
public void onClick(View v) {
/*查询是否本机是否提供某种感应器能力*/
if(sms.getDefaultSensor(Sensor.TYPE_ORIENTATION) != null)
orientation.setChecked(true);
if(sms.getDefaultSensor(Sensor.TYPE_ACCELEROMETER) != null)
gravity.setChecked(true);
if(sms.getDefaultSensor(Sensor.TYPE_LIGHT) != null)
light.setChecked(true);
}

});

}
}