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Hi friends I'm trying to make torch application in unity.From documentation I have noticed that setTorchMode() is applicable only if we have API>22. It works fine for API>22.But for below API<23 I have followed this. But even though my application in not staring torch in API<23 . From Logcat I have traced that CameraService: Permission Denial: can't use the camera

Detail Error Report:

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)

Here is my C# (Unity Code)

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);
}

Also Here is my Java code(Name of JAVA class is AndroidTrochClass) for API<23

        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();
        }

NOTE: I'm using Java Class Just as Plugin So Java Class extend to nothing so I have passed current context to Java Methods

Udhaya
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  • Is it AndroidTrochClass or AndroidTorchClass? – Ayyappa Aug 17 '20 at 12:40
  • I have spelled wrong torch to troch but I think it is not problem Since I used same name to call that method from C#("com.mugames.torchlibrary.AndroidTrochClass") – Udhaya Aug 17 '20 at 13:19
  • Ok, no worries. Please edit your question for more clarity. There are some confusing parts. For ease, just follow this structure 1. Problem statement 2. What is working 3. What is failing – Ayyappa Aug 17 '20 at 13:21

1 Answers1

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Found!! I need to add Camera permission in manifest file ;)

Udhaya
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