使用 getOrientation() 函数获取设备角度 [英] Get device angle by using getOrientation() function
问题描述
我使用 Sensor.TYPE_ORIENTATION
来确定设备的当前角度,但 TYPE_ORIENTATION
在 API 版本 8 上已弃用.在 SensorManager 手册中,它引用了 getOrientation()
函数以使用 TYPE_ORIENTATION
.
I was using Sensor.TYPE_ORIENTATION
to determine current angle of device but TYPE_ORIENTATION
is deprecated on API version 8. In SensorManager manual it refers to getOrientation()
function in order to use TYPE_ORIENTATION
.
这是我的旧代码:
public void onSensorChanged(SensorEvent event) {
Log.d("debug","Sensor Changed");
if (event.sensor.getType()==Sensor.TYPE_ORIENTATION) {
Log.d("debug",Float.toString(event.values[0]));
float mAzimuth = event.values[0];
float mPitch = event.values[1];
float mRoll = event.values[2];
Log.d("debug","mAzimuth :"+Float.toString(mAzimuth));
Log.d("debug","mPitch :"+Float.toString(mPitch));
Log.d("debug","mRoll :"+Float.toString(mRoll));
}
}
我对使用 getOrientation()
函数真的很困惑,谁能告诉我一个如何获得角度的例子?
I'm really confused about using getOrientation()
function, can anyone please show me an example how to get the angles?
推荐答案
您现在使用两个传感器(ACCELEROMETER 和 MAGNETIC_FIELD)来获取该信息.请参阅博文了解更多详情.
You now use two sensors (ACCELEROMETER and MAGNETIC_FIELD) to get that information. See blog post for more detail.
public class CompassActivity extends Activity implements SensorEventListener {
private SensorManager mSensorManager;
Sensor accelerometer;
Sensor magnetometer;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(mCustomDrawableView); // Register the sensor listeners
mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);
accelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
magnetometer = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
}
protected void onResume() {
super.onResume();
mSensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_UI);
mSensorManager.registerListener(this, magnetometer, SensorManager.SENSOR_DELAY_UI);
}
protected void onPause() {
super.onPause();
mSensorManager.unregisterListener(this);
}
public void onAccuracyChanged(Sensor sensor, int accuracy) { }
float[] mGravity;
float[] mGeomagnetic;
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER)
mGravity = event.values;
if (event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD)
mGeomagnetic = event.values;
if (mGravity != null && mGeomagnetic != null) {
float R[] = new float[9];
float I[] = new float[9];
boolean success = SensorManager.getRotationMatrix(R, I, mGravity, mGeomagnetic);
if (success) {
float orientation[] = new float[3];
SensorManager.getOrientation(R, orientation);
azimut = orientation[0]; // orientation contains: azimut, pitch and roll
}
}
}
}
权限:
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
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