是否可以在查看相机预览时知道手机指向哪个方向,或者您是否需要让手机像指南针一样平坦.
谢谢
解决方法:
是 – 以下代码应该完成这项工作
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);
}
}
标签:android,sensor,direction 来源: https://codeday.me/bug/20190606/1189603.html
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