最后我找到了答案。
首先,我没有使用 TYPE_ORIENTATION,而是使用了 TYPE_GRAVITY。
这是我的完整代码。
我的自定义视图的代码是..
public class GyroscopeView extends View
{
private final static String TAG = "GyroscopeView";
private float bearing;
float pitch = 0;
float roll = 0;
private Paint paintOuter;
private Paint paintInner;
private Paint paintDot;
float pointX, pointY;
float dotX, dotY;
int radius;
public GyroscopeView(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
initCompassView();
}
public GyroscopeView(Context context, AttributeSet attrs)
{
super(context, attrs);
// TODO Auto-generated constructor stub
initCompassView();
}
public GyroscopeView(Context context)
{
super(context);
// TODO Auto-generated constructor stub
initCompassView();
}
protected void initCompassView()
{
setFocusable(true);
Resources r = this.getResources();
paintOuter = new Paint(Paint.ANTI_ALIAS_FLAG);
paintOuter.setColor(Color.WHITE);
paintOuter.setStrokeWidth(1);
paintOuter.setStyle(Paint.Style.FILL_AND_STROKE);
paintInner = new Paint(Paint.ANTI_ALIAS_FLAG);
paintInner.setColor(Color.BLUE);
paintInner.setStrokeWidth(1);
paintInner.setStyle(Paint.Style.STROKE);
paintDot = new Paint(Paint.ANTI_ALIAS_FLAG);
paintDot.setColor(Color.RED);
paintDot.setStrokeWidth(1);
paintDot.setStyle(Paint.Style.FILL_AND_STROKE);
}
@Override
protected void onDraw(Canvas canvas)
{
// TODO Auto-generated method stub
super.onDraw(canvas);
int px = getMeasuredWidth() / 2;
int py = getMeasuredHeight() / 2;
radius = Math.min(px, py);
pointX = px;
pointY = py;
canvas.drawCircle(pointX, pointY, radius, paintOuter);
canvas.drawCircle(pointX, pointY, 40, paintInner);
canvas.drawCircle(dotX, dotY, 5, paintDot);
}
void update(float z, float yy, float xx)
{
if (yy > 0)
{
dotY = pointY - ((1 - yy) * z);
} else
{
dotY = pointY + ((1 - yy) * z);
}
if (xx > 0)
{
dotX = pointX - ((1 - xx) * z);
} else
{
dotX = pointX + ((1 - xx) * z);
}
invalidate();
}
这是我的活动代码。
public class GyroscopeActivity extends Activity
{
GyroscopeView gyroscopeView;
SensorManager sensorManager;
float[] gValues = new float[3];
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.gyroscope);
gyroscopeView = (GyroscopeView) findViewById(R.id.gyroscope_view);
initSensor();
}
void initSensor()
{
sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
}
@Override
protected void onResume()
{
super.onResume();
Sensor sensorGyroscope = sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY);
sensorManager.registerListener(sensorGyroListener, sensorGyroscope, SensorManager.SENSOR_DELAY_UI);
}
@Override
protected void onStop()
{
sensorManager.unregisterListener(sensorGyroListener);
super.onStop();
}
private final SensorEventListener sensorGyroListener = new SensorEventListener()
{
public void onSensorChanged(SensorEvent event)
{
if (event.sensor.getType() == Sensor.TYPE_GRAVITY)
gValues = event.values;
gyroscopeView.update(gValues[0], gValues[1], gValues[2]);
}
public void onAccuracyChanged(Sensor sensor, int accuracy)
{
}
};
希望这会对某人有所帮助。