使用Android Studio中的加速度计访问设备的移动程度

Question

（我是Android的初学者，请轻松对我轻松）

我正在制作一个应用程序，需要精确定位和计算两个非常紧密的位置之间的差异。我高度怀疑GP可以实现这一精度，就目前而言，我正在使用具有良好加速度计的高端手机。基本上，如何以极高的精度访问设备的移动？

Answer 1

您可以从此开始以获取加速度计。我以前没有使用此功能做任何事情。

public class yourActivity extends Activity implements SensorEventListener{
 private SensorManager sensorManager;
 double ax,ay,az;   // these are the acceleration in x,y and z axis
 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        sensorManager=(SensorManager) getSystemService(SENSOR_SERVICE);
        sensorManager.registerListener(this, sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER), SensorManager.SENSOR_DELAY_NORMAL);
   }
   @Override
   public void onAccuracyChanged(Sensor arg0, int arg1) {
   }
   @Override
   public void onSensorChanged(SensorEvent event) {
        if (event.sensor.getType()==Sensor.TYPE_ACCELEROMETER){
            ax=event.values[0];
                    ay=event.values[1];
                    az=event.values[2];
            }
   }
}

这是指南的链接，它似乎很彻底，可能会帮助您走上路。使用加速度计

Answer 2

它将起作用

private SensorManager sensorMan;
private Sensor accelerometer;
private float[] mGravity;
private float mAccel;
private float mAccelCurrent;
private float mAccelLast;
// In onCreate method
sensorMan = (SensorManager)getSystemService(SENSOR_SERVICE);
accelerometer = sensorMan.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
mAccel = 0.00f;
mAccelCurrent = SensorManager.GRAVITY_EARTH;
mAccelLast = SensorManager.GRAVITY_EARTH;
// And these:
@Override
public void onResume() {
    super.onResume();
    sensorMan.registerListener(this, accelerometer,
        SensorManager.SENSOR_DELAY_UI);
}
@Override
protected void onPause() {
    super.onPause();
    sensorMan.unregisterListener(this);
}
@Override
public void onSensorChanged(SensorEvent event) {
    if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER){
        mGravity = event.values.clone();
        // Shake detection
        float x = mGravity[0];
        float y = mGravity[1];
        float z = mGravity[2];
        mAccelLast = mAccelCurrent;
        mAccelCurrent = FloatMath.sqrt(x*x + y*y + z*z);
        float delta = mAccelCurrent - mAccelLast;
        mAccel = mAccel * 0.9f + delta;
            // Make this higher or lower according to how much
            // motion you want to detect
        if(mAccel > 3){ 
        // do something
        }
    }
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
    // required method
}