Unity Error AndroidJavaException: java.lang.NoSuchMethodError:

SayChunKim commented 2 years ago

Hi i actually trying to import aar / module of AltBeacon into Unity project but encountered certain error

Expected behavior

Assuming beaconManager able to get instance along with applicationContext via CallStatic method of AndroidJavaClass of Unity

public void initializeBeacon()
    {
        AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject activity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
        AndroidJavaObject context = activity.Call<AndroidJavaObject>("getApplicationContext");
        beaconManager = new AndroidJavaClass("org.altbeacon.beacon.BeaconManager");
//call method via Unity ScriptingAPI
        beaconManager.CallStatic("getInstanceForApplication", context);
        beaconStatusLog.text = "Initialized";
    }

Actual behavior

Error Unity AndroidJavaException: java.lang.NoSuchMethodError: no non-static method with name='getInstanceForApplication' signature='(Landroid.app.Application;I)V' in class Ljava.lang.Object;
2022/01/26 04:03:53.329 8653 8693 Error Unity java.lang.NoSuchMethodError: no non-static method with name='getInstanceForApplication' signature='(Landroid.app.Application;I)V' in class Ljava.lang.Object;
2022/01/26 04:03:53.329 8653 8693 Error Unity   at com.unity3d.player.ReflectionHelper.getMethodID(Unknown Source:226)
2022/01/26 04:03:53.329 8653 8693 Error Unity   at com.unity3d.player.UnityPlayer.nativeRender(Native Method)
2022/01/26 04:03:53.329 8653 8693 Error Unity   at com.unity3d.player.UnityPlayer.access$300(Unknown Source:0)
2022/01/26 04:03:53.329 8653 8693 Error Unity   at com.unity3d.player.UnityPlayer$e$1.handleMessage(Unknown Source:95)
2022/01/26 04:03:53.329 8653 8693 Error Unity   at android.os.Handler.dispatchMessage(Handler.java:103)
2022/01/26 04:03:53.329 8653 8693 Error Unity   at android.os.Looper.loop(Looper.java:213)
2022/01/26 04:03:53.329 8653 8693 Error Unity   at com.unity3d.player.UnityPlayer$e.run(Unknown Source:20)
2022/01/26 04:03:53.329 8653 8693 Error Unity   at UnityEngine.AndroidJNISafe.CheckException () [0x00000] in <00000000000000000000000000000000>:0

Steps to reproduce this behavior

Import snippets of build.gradle, AndroidManifest.xml as the android studio project in Unity Project
Added coding snippet as above for Button canvas OnClick listener in Unity Scene

Mobile device model and OS version

Huawei Nova 4 unrooted VCE-L22 Android version 10

Android Beacon Library version

2.19.3

IMPORTANT: This forum is reserved for feature requests or reproducible bugs with the library itself. If you need help with using the library with your project, please open a new question on StackOverflow.com.

davidgyoung commented 2 years ago

This question is out-of-scope for this forum because it is about how to use the library and not regarding a feature request or a bug report.

My knowledge of Unity is very limited, but I don't think these two lines are correct:

    beaconManager = new AndroidJavaClass("org.altbeacon.beacon.BeaconManager");
    //call method via Unity ScriptingAPI
    beaconManager.CallStatic("getInstanceForApplication", context);

It appears that the first line constructs a new instance of the object from the class and the second line makes a call to the constructed object. The error message you show is about there not being an instance method called "getInstanceForApplication". I suspect there is a different way in Unity to call a static method on a class. Again, I could be wrong -- I am no Unity expert.

Since this is out-of-scope, I am closing this issue. Please open a question on StackOverflow.com and I will be happy to assist there. Since my knowledge of Unity is very limited, other members will likely be able to help more.

SayChunKim commented 2 years ago

This question is out-of-scope for this forum because it is about how to use the library and not regarding a feature request or a bug report.

My knowledge of Unity is very limited, but I don't think these two lines are correct:
    beaconManager = new AndroidJavaClass("org.altbeacon.beacon.BeaconManager");
    //call method via Unity ScriptingAPI
    beaconManager.CallStatic("getInstanceForApplication", context);
It appears that the first line constructs a new instance of the object from the class and the second line makes a call to the constructed object. The error message you show is about there not being an instance method called "getInstanceForApplication". I suspect there is a different way in Unity to call a static method on a class. Again, I could be wrong -- I am no Unity expert.

Since this is out-of-scope, I am closing this issue. Please open a question on StackOverflow.com and I will be happy to assist there. Since my knowledge of Unity is very limited, other members will likely be able to help more.

Thank you, i have managed to get it worked

AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject activity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
        AndroidJavaObject context = activity.Call<AndroidJavaObject>("getApplicationContext");
        beaconManager = new AndroidJavaClass("org.altbeacon.beacon.BeaconManager");
        beaconManager.CallStatic<AndroidJavaObject>("getInstanceForApplication", context);
        beaconStatusLog.text = "Initialized";

Thanks

AltBeacon / android-beacon-library