我想从Android设备获取相机的数量,检查是否有背面,并且该相机获得水平和垂直视角Camera.Parameters.getHorizontalViewAngle()
。
我想从Unity3D c#脚本中执行此操作,但我的java技能有限。任何人都可以提供任何帮助吗? 我有这段代码:
using UnityEngine;
#if UNITY_ANDROID
public class CameraParametersAndroid
{
public static float HorizontalViewAngle { get; protected set; }
public static float VerticalViewAngle { get; protected set; }
public static int numCameras { get; protected set; }
static CameraParametersAndroid()
{
AndroidJavaClass unityPlayerClass = new AndroidJavaClass ("com.unity3d.player.UnityPlayer"),
cameraClass = new AndroidJavaClass ("android.hardware.Camera"),
cameraParametersClass = new AndroidJavaClass ("android.hardware.Camera.Parameters"),
cameraInfoClass = new AndroidJavaClass ("android.hardware.Camera.CameraInfo");
AndroidJavaObject currentActivity = unityPlayerClass.GetStatic<AndroidJavaObject>("currentActivity");
object[] args = {currentActivity};
AndroidJavaObject camera = cameraClass.CallStatic<AndroidJavaObject>("getCamera", args);
if (camera != null)
{
AndroidJavaObject cameraParameters = camera.Call<AndroidJavaObject>("getParameters");
numCameras = camera.Call<int>("getNumberOfCameras");
HorizontalViewAngle = cameraParameters.Call<float>("getHorizontalViewAngle");
VerticalViewAngle = cameraParameters.Call<float>("getVerticalViewAngle");
}
else
{
Debug.LogError("[CameraParametersAndroid] Camera not available");
}
}
}
#endif
但即使getNumberOfCameras()
来电也无效。
答案 0 :(得分:4)
getNumberOfCameras是一种静态方法,所以你需要CallStatic你的'cameraClass'
'android.hardware.Camera'中没有'getCamera'方法(或者至少我在文档中找不到它)。你应该使用'Camera.open',但有一个技巧。 “Camera.open”要求您的应用具有相机权限,除非您使用内置相机功能,否则Unity不会生成相机权限。
以下适用于Android ICS:
using UnityEngine;
#if UNITY_ANDROID
public class CameraParametersAndroid
{
public static float HorizontalViewAngle { get; protected set; }
public static float VerticalViewAngle { get; protected set; }
public static int numCameras { get; protected set; }
static CameraParametersAndroid()
{
AndroidJavaClass cameraClass = new AndroidJavaClass("android.hardware.Camera");
numCameras = cameraClass.CallStatic<int>("getNumberOfCameras");
// This is an ugly hack to make Unity
// generate Camera permisions
WebCamDevice[] devices = WebCamTexture.devices;
// Camera.open gets back-facing camera by default
// you should check for exceptions
int camID = 0;
AndroidJavaObject camera = cameraClass.CallStatic<AndroidJavaObject>("open", camID);
// I'm pretty sure camera will never be null at this point
// It will either be a valid object or Camera.open would throw an exception
if (camera != null)
{
AndroidJavaObject cameraParameters = camera.Call<AndroidJavaObject>("getParameters");
HorizontalViewAngle = cameraParameters.Call<float>("getHorizontalViewAngle");
VerticalViewAngle = cameraParameters.Call<float>("getVerticalViewAngle");
}
else
{
Debug.LogError("[CameraParametersAndroid] Camera not available");
}
}
}
#endif