如何检测手机的一整圈（360度）？ [英] How to detect one full turn (360 degrees) of the phone?

问题描述

由于我没有在网络上找到任何相关的答案，因此我发布了一个有关使用加速度计检测android设备绕其轴 360度旋转的问题。例如，在横向模式下绕y轴：假设在起始位置y值为0（设备与地面平坦）。当电话向前旋转90度 y = -10 时，向前倾斜180度将导致 y = 0 ， y = +10 倾斜270度，而 y = 0 倾斜360度。那么代码看起来如何仅在预定方向上检测到设备的这种完全转向？

Since I did not find any relevant answers searching the web, I am posting a question regarding detection of 360 degrees turns of android devices around its axes using the accelerometer. For example around y-axis in landscape mode: let us say that in starting position y value is 0 (device is flat to ground). When phone is rotated forward for 90 degrees y = -10, 180 degrees forward tilt would result in y = 0, 270 degrees tilt in y = +10 and 360 degrees in y = 0. So how would the code look like to detect this full turn of the device only in prespecified direction?

@Override
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
    // assign directions
    x = event.values[1];
    y = event.values[0];
    z = event.values[2];

        ???
    }
}

编辑： $ b

private float[] r = new float[9];
private float[] i = new float[9];
private float[] v = new float[3];

private float[] accValues = new float[3];
private float[] geoValues = new float[3];

private int azimuth, pitch, roll;

@Override
public void onSensorChanged(SensorEvent event) {

    if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
        accValues = event.values.clone();
    }

    if (event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD) {
        geoValues = event.values.clone();
    }

    boolean success = SensorManager.getRotationMatrix(r, i, accValues,
        geoValues);

    if (success) {
        SensorManager.getOrientation(r, v);

        azimuth = v[0] * (180 / Math.PI);
        pitch = v[1] * (180 / Math.PI);
        roll = v[2] * (180 / Math.PI);
    }
}

推荐答案

您可能会尝试：

`

@Override

`
@Override

public void onSensorChanged(SensorEvent event) {

if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {

x = event.values[1];
y = event.values[0];
z = event.values[2];

if (event.sensor.getType() == Sensor.TYPE_ORIENTATION) {
x1 = event.values[1];
y1 = event.values[0];
z1 = event.values[2];

}

}`

此代码应允许您检测加速度和方向的变化，因此即使加速度计的Y值再次从0变为0，因为方向发生了变化，但旋转了一个整周（但是，您仍然需要清除此代码，以消除手机向某个方向旋转180°，然后又向后旋转180°（重新将手机上下移动）的情况）

This code should allow you to detect a change in acceleration and orientation, so even if the Y value of the accelerometer goes from 0 to 0 again because there was a change in orientation then there was a full rotation (however, u still need to clean this code to eliminate the case where the phone goes 180° in a direction and then goes back 180° (turn the phone up and down again ))

出于好奇，您为什么需要将手机旋转360°？我试图将手机旋转360°，这并非易事。

Out of curiosity, why would you need a 360° turn of the phone? I tried to turn my phone 360°, it's not something easy to do.

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