public class Compass extends GraphicsActivity {
private static final String TAG = "Compass";
private SensorManager mSensorManager;
private SampleView mView;
private float[] mValues;
private final SensorListener mListener = new SensorListener() {
public void onSensorChanged(int sensor, float[] values) {
if (Config.LOGD) Log.d(TAG, "sensorChanged (" + values[0] + ", " + values[1] + ", " + values[2] + ")");
mValues = values;
if (mView != null) {
mView.invalidate();
}
}
public void onAccuracyChanged(int sensor, int accuracy) {
// TODO Auto-generated method stub
}
};
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
mView = new SampleView(this);
setContentView(mView);
}
@Override
protected void onResume()
{
if (Config.LOGD) Log.d(TAG, "onResume");
super.onResume();
mSensorManager.registerListener(mListener,
SensorManager.SENSOR_ORIENTATION,
SensorManager.SENSOR_DELAY_GAME);
}
@Override
protected void onStop()
{
if (Config.LOGD) Log.d(TAG, "onStop");
mSensorManager.unregisterListener(mListener);
super.onStop();
}
private class SampleView extends View {
private Paint mPaint = new Paint();
private Path mPath = new Path();
private boolean mAnimate;
private long mNextTime;
public SampleView(Context context) {
super(context);
// Construct a wedge-shaped path
mPath.moveTo(0, -50);
mPath.lineTo(-20, 60);
mPath.lineTo(0, 50);
mPath.lineTo(20, 60);
mPath.close();
}
@Override protected void onDraw(Canvas canvas) {
Paint paint = mPaint;
canvas.drawColor(Color.WHITE);
paint.setAntiAlias(true);
paint.setColor(Color.BLACK);
paint.setStyle(Paint.Style.FILL);
int w = canvas.getWidth();
int h = canvas.getHeight();
int cx = w / 2;
int cy = h / 2;
canvas.translate(cx, cy);
if (mValues != null) {
canvas.rotate(-mValues[0]);
}
canvas.drawPath(mPath, mPaint);
}
@Override
protected void onAttachedToWindow() {
mAnimate = true;
super.onAttachedToWindow();
}
@Override
protected void onDetachedFromWindow() {
mAnimate = false;
super.onDetachedFromWindow();
}
}
}
위 소스는 api demo에 있는 compass 예제인데요
프로그램 구동 순서라든지 함수에 대해 설명 해주실분 계신가요?
아니면 주석이라도.... 부탁드립니다.