JNI Exception using Android Plugin

Question

Hi,

I'm trying to integrate the DeployGate SDK into my unity game for android. Here's what it says on their website:

If your project has an Application class specified in in your AndroidManifest.xml, open that class and add following line into onCreate() function: DeployGate.install(this);

https://deploygate.com/docs/sdk

So I downloaded the deploygatesdk.jar, copied it to /Assets/Plugins/Android, and used it on startup (C# MonoBehaviour called DeployGate.cs) like this:

     void Start () {

         AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");

         AndroidJavaObject activity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");

         AndroidJavaObject app = activity.Call<AndroidJavaObject>("getApplicationContext");



         AndroidJavaClass dg = new AndroidJavaClass("com.deploygate.sdk.DeployGate");

         dg.CallStatic("install", app);

     }

When I start the game on android, LogCat reports these Errors:

 04-14 01:51:14.389: I/Unity(17702): ExecutionEngineException: JNI Exception

 04-14 01:51:14.389: I/Unity(17702):   at UnityEngine.AndroidJavaObject._CallStatic (System.String methodName, System.Object[] args) [0x00000] in <filename unknown>:0 

 04-14 01:51:14.389: I/Unity(17702):   at UnityEngine.AndroidJavaObject.CallStatic (System.String methodName, System.Object[] args) [0x00000] in <filename unknown>:0 

 04-14 01:51:14.389: I/Unity(17702):   at DeployGate.Start () [0x00034] in D:\Unity\TestGame\Assets\Scripts\DeployGate.cs:15 

 04-14 01:51:14.389: I/Unity(17702):  

 04-14 01:51:14.389: I/Unity(17702): (Filename: D Line: 0)

D:\Unity\TestGame\Assets\Scripts\DeployGate.cs:15 is the project path on my windows PC. This is weird. Any idea how to resolve this Exception?

EDIT: I activated debug-checkjni in adb and this exception might be more of a help:

 04-14 10:22:25.826: W/System.err(28435): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
 04-14 10:22:25.846: W/System.err(28435):     at android.os.Handler.<init>(Handler.java:197)
 04-14 10:22:25.846: W/System.err(28435):     at android.os.Handler.<init>(Handler.java:111)
 04-14 10:22:25.846: W/System.err(28435):     at com.deploygate.sdk.DeployGate.<init>(DeployGate.java:207)
 04-14 10:22:25.846: W/System.err(28435):     at com.deploygate.sdk.DeployGate.install(DeployGate.java:467)
 04-14 10:22:25.846: W/System.err(28435):     at com.deploygate.sdk.DeployGate.install(DeployGate.java:441)
 04-14 10:22:25.846: W/System.err(28435):     at com.deploygate.sdk.DeployGate.install(DeployGate.java:418)
 04-14 10:22:25.846: W/System.err(28435):     at com.deploygate.sdk.DeployGate.install(DeployGate.java:369)
 04-14 10:22:25.846: W/System.err(28435):     at com.deploygate.sdk.DeployGate.install(DeployGate.java:349)
 04-14 10:22:25.846: W/System.err(28435):     at com.unity3d.player.UnityPlayer.nativeRender(Native Method)
 04-14 10:22:25.846: W/System.err(28435):     at com.unity3d.player.UnityPlayer.onDrawFrame(Unknown Source)
 04-14 10:22:25.846: W/System.err(28435):     at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1516)
 04-14 10:22:25.846: W/System.err(28435):     at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1240)

According to Google it has to run on the uithread to work. Do I have to edit the jar file to achieve that?

Answer 1

Ok, I'm gonna solve this myself. Here's how I did it:

 public static class DeployGate {

     private static AndroidJavaClass deployGate = null;

     public static void Install() {
         // Get Android context
         AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
         AndroidJavaObject activity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
         AndroidJavaObject app = activity.Call<AndroidJavaObject>("getApplicationContext");

         // Install DeployGate, make sure it will not called twice in your app
         deployGate = new AndroidJavaClass("com.deploygate.sdk.DeployGate");

         activity.Call("runOnUiThread", new AndroidJavaRunnable(() =>
         {
             deployGate.CallStatic("install", app);
         }));
     }
 }

So

             activity.Call("runOnUiThread", new AndroidJavaRunnable(() =>
             {
                 deployGate.CallStatic("install", app);
             }));

makes the call run on the uithread, additionally, I made everything static since DeployGate should only be installed once and should be persistent through level changes (but that didn't have anything to do with my errors). So it's not a MonoBehaviour anymore, instead I call it like this:

 DeployGate.Install();

I hope this'll help someone who stumbles upon this with the same problem. Here's the whole class with a few basic methods:

 using UnityEngine;
 using System.Collections;
 
 public static class DeployGate {
 
     private static AndroidJavaClass deployGate = null;
 
     public static void Install() {
 
         // Get Android context
         AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
         AndroidJavaObject activity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
         AndroidJavaObject app = activity.Call<AndroidJavaObject>("getApplicationContext");
 
         // Install DeployGate, make sure it will not called twice in your app
         deployGate = new AndroidJavaClass("com.deploygate.sdk.DeployGate");
 
         activity.Call("runOnUiThread", new AndroidJavaRunnable(() =>
         {
             deployGate.CallStatic("install", app);
         }));
     }
 
     public static void LogError(string text) {
         deployGate.CallStatic("logError", text);
     }
 
     public static void LogWarn(string text) {
         deployGate.CallStatic("logWarn", text);
     }
 
     public static void LogDebug(string text) {
         deployGate.CallStatic("logDebug", text);
     }
 
     public static void LogInfo(string text) {
         deployGate.CallStatic("logInfo", text);
     }
 
     public static void LogVerbose(string text) {
         deployGate.CallStatic("logVerbose", text);
     }
 }

Source: https://github.com/anchan828/deploygate-with-unity/blob/master/Assets/DeployGate/Plugins/DeployGateSDK.cs

JNI Exception using Android Plugin

1 Reply

Follow this Question

Related Questions