public class Compass extends Activity implements SensorEventListener {
// define the display assembly compass picture
private ImageView image;
// record the compass picture angle turned
private float currentDegree = 0f;
// device sensor manager
private SensorManager mSensorManager;
TextView tvHeading;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_new);
// our compass image
image = (ImageView) findViewById(R.id.imageViewCompass);
// TextView that will tell the user what degree is he heading
tvHeading = (TextView) findViewById(R.id.tvHeading);
// initialize your android device sensor capabilities
mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
}
@Override
protected void onResume() {
super.onResume();
// for the system's orientation sensor registered listeners
mSensorManager.registerListener(this, mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION),
SensorManager.SENSOR_DELAY_GAME);
}
@Override
protected void onPause() {
super.onPause();
// to stop the listener and save battery
mSensorManager.unregisterListener(this);
}
@Override
public void onSensorChanged(SensorEvent event) {
// get the angle around the z-axis rotated
float degree = Math.round(event.values[0]);
tvHeading.setText("Heading: " + Float.toString(degree) + " degrees");
// create a rotation animation (reverse turn degree degrees)
RotateAnimation ra = new RotateAnimation(
currentDegree,
-degree,
Animation.RELATIVE_TO_SELF, 0.5f,
Animation.RELATIVE_TO_SELF,
0.5f);
// how long the animation will take place
ra.setDuration(210);
// set the animation after the end of the reservation status
ra.setFillAfter(true);
// Start the animation
image.startAnimation(ra);
currentDegree = -degree;
}
구글에서 얻은 나침반 소스 코드 중 일부분 입니다.
마지막에 보시면 onSensorChanged가 나오는데 여기서 degree 값을 다른 액티비티에서 사용하고 싶습니다. 다른 액티비티의 이름은 MainActivity입니다. MainActivity에 degree 값을 전달받아서 표시하고 싶은데 어떻게 해야할 지 모르겠습니다. 자세히 알려주시면 감사하겠습니다.