我无法使用API​​ <= 22使用Android Studio和Unity在设备中启动割炬为什么？

编程问答 2022-08-16

问题描述

您好朋友，我正在尝试统一使用火炬。从文档中我注意到，只有在我们使用API​​> 22的情况下，setTorchMode（）才适用。它对于API> 22正常工作。但是对于低于API this。但是即使我的应用程序没有在API CameraService: Permission Denial: can't use the camera

详细错误报告：

08-18 09:27:22.343 758-835/? I/ActivityManager: Killing 
14121:com.google.android.partnersetup/u0a7 (adj 15): DHA:empty #19
08-18 09:27:22.343 196-2615/? W/ServiceManager: Permission failure: 
android.permission.CAMERA from uid=10242 pid=14010
08-18 09:27:22.343 196-2615/? E/CameraService: Permission Denial: can't 
use the camera pid=14010,uid=10242
08-18 09:27:22.343 14010-14051/? W/CameraBase: An error occurred while 
connecting to camera: 0
08-18 09:27:22.353 14010-14051/? E/ContentValues: TorchMode: 
java.lang.RuntimeException: Fail to connect to camera service
`enter code here`at android.hardware.Camera.<init>(Camera.java:568)
 at android.hardware.Camera.open(Camera.java:426)
 at 
com.mugames.torchlibrary.AndroidTrochClass.TorchMode
(AndroidTrochClass.java:64)
at com.unity3d.player.UnityPlayer.nativeRender(Native Method)
at com.unity3d.player.UnityPlayer.access$300(UnkNown Source)
at com.unity3d.player.UnityPlayer$e$1.handleMessage(UnkNown Source)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:145)
at com.unity3d.player.UnityPlayer$e.run(UnkNown Source)

这是我的C＃（统一代码）

private void Awake()
{
    if(!Permission.HasUserAuthorizedPermission(Permission.Camera))
    {
        Permission.RequestUserPermission(Permission.Camera);
    }
}

void Start()
{
    AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
    AndroidJavaObject activity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
    AndroidJavaObject context = activity.Call<AndroidJavaObject>("getApplicationContext");
    javaObject = new AndroidJavaObject("com.mugames.torchlibrary.AndroidTrochClass");
    javaObject.Call("Init",context);
    javaObject.Call("TorchMode",true);
}

这也是我针对API 

        try {
            if(camera== null && parameters==null) {
                camera = Camera.open();
                parameters = camera.getParameters();

                List<String> modesAvailable = parameters.getSupportedFlashModes();
                if (modesAvailable.contains(Camera.Parameters.FLASH_MODE_TORCH)) {
                    parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
                } else if (modesAvailable.contains((Camera.Parameters.FLASH_MODE_ON))) {
                    parameters.setFlashMode(Camera.Parameters.FLASH_MODE_ON);
                } else {
                    Log.d("Unity","No Flash Available");
                }
                camera.setParameters(parameters);
            }
            if (state) {
                camera.startPreview();
            } else {
                camera.stopPreview();
            }
        }
        catch (Exception e)
        {
            Log.e(TAG,"TorchMode: ",e);
            e.printstacktrace();
        }

注意：我使用java类就像插件一样，所以java类没有扩展，因此我将当前上下文传递给Java方法

解决方法

发现了！！我需要在清单文件中添加Camera权限；）

androidandroidandroid-studiojavajavapluginspluginsunity3dunity3d