如何获得方向的安卓（如北，西）

本文介绍了如何获得方向的安卓（如北，西）的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我是新的Android和我想根据我的相机获得的方向。根据我的相机我怎样才能得到方向信息？你能不能给一个想法呢？

I am new in Android and i want to get direction according to my camera. How can i get direction information according to my camera? Could you give an idea for this?

问候。

TYPE_ORIENTATION is deprecated

We cannot use the Orientation Sensor anymore, we can use the Magnetic Field Sensor and Accelerometer Sensors in tandem to get equivalent functionality. It's more work but it does allow to continue to use a callback to handle orientation changes.

下面是一个指南针样品： http://www.codingforandroid.com/2011/01/using取向的传感器，simple.html

从的加速度计和磁场的转换来的 AZIMUT 的：

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];

        if (SensorManager.getRotationMatrix(R, I, mGravity, mGeomagnetic)) {

            // orientation contains azimut, pitch and roll
            float orientation[] = new float[3];
            SensorManager.getOrientation(R, orientation);

            azimut = orientation[0];
        }
    }
}

要指向北方，你可以计算出度的旋转：

To point the north you can calculate a rotation in degrees :

float rotation = -azimut * 360 / (2 * 3.14159f);

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