安卓方向传感器
答
是 - 下面的代码应该做的工作
public class Test extends Activity implements SensorEventListener{
public static float swRoll;
public static float swPitch;
public static float swAzimuth;
public static SensorManager mSensorManager;
public static Sensor accelerometer;
public static Sensor magnetometer;
public static float[] mAccelerometer = null;
public static float[] mGeomagnetic = null;
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
@Override
public void onSensorChanged(SensorEvent event) {
// onSensorChanged gets called for each sensor so we have to remember the values
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
mAccelerometer = event.values;
}
if (event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD) {
mGeomagnetic = event.values;
}
if (mAccelerometer != null && mGeomagnetic != null) {
float R[] = new float[9];
float I[] = new float[9];
boolean success = SensorManager.getRotationMatrix(R, I, mAccelerometer, mGeomagnetic);
if (success) {
float orientation[] = new float[3];
SensorManager.getOrientation(R, orientation);
// at this point, orientation contains the azimuth(direction), pitch and roll values.
double azimuth = 180 * orientation[0]/Math.PI;
double pitch = 180 * orientation[1]/Math.PI;
double roll = 180 * orientation[2]/Math.PI;
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
accelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
magnetometer = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
}
@Override
protected void onResume() {
super.onResume();
mSensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_GAME);
mSensorManager.registerListener(this, magnetometer, SensorManager.SENSOR_DELAY_GAME);
}
@Override
protected void onPause() {
super.onPause();
mSensorManager.unregisterListener(this, accelerometer);
mSensorManager.unregisterListener(this, magnetometer);
}
}
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如何在日志中打印方向?在哪个变量中获取方向? – 2013-12-05 08:31:33
+0
@Mitesh方位角值是您应该打印的方位值。 Log.d(“direction”,String.valueOf(方位角))应该完成这项工作。 – Richard 2014-02-21 01:59:10
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@Richard :: Thank you .. :) – 2014-02-21 07:46:55
你可以得到它指向的方向,和手机的沿3轴传感器的旋转。所以你可以做任何你想做的事情。 – Falmarri 2010-10-19 21:29:44