Unity3d 的 ACTION_USER_PRESENT 导致启动画面后崩溃

Question

我为统一游戏制作了一个java插件，可以在屏幕解锁时重新打开音乐。在 Android 2.3.3 上它可以正常工作，但我收到抱怨说它在 Android 2.2 下使游戏崩溃。 我没有设备来测试这个，但是有很多抱怨，所以确实出了问题。

有人遇到过同样的问题吗？

Java插件仅包含一个BroadcastReceiver，它向unity发送一条消息：

    public void onReceive(Context arg0, Intent intent) {
    if(intent.getAction().equals(Intent.ACTION_USER_PRESENT))
    {
        try {
                UnityPlayer.UnitySendMessage("Camera", "OnUserReturned", null);
            } catch (UnsatisfiedLinkError e) {
                Log.e("UNITY_SEND_MSG", e.getMessage());
                e.printStackTrace();
            }
    }
        }

在Manifest：中，

<receiver android:name="UserPresentReceiver">
        <intent-filter>
           <action android:name="android.intent.action.USER_PRESENT" /> 
        </intent-filter>
    </receiver>

我无法弄清楚导致崩溃的原因，并且无法重现它们在 Android 2.3 下。有人可以帮我解决这个问题，或者建议另一种方法在锁定屏幕下停止音乐并在锁定屏幕消失后重新启动音乐吗？

提前致谢

编辑： 堆栈跟踪：

01-01 02:29:31.036: WARN/dalvikvm(8970): JNI WARNING: received null jstring (Check_GetStringUTFChars)
01-01 02:29:31.036: INFO/dalvikvm(8970): "main" prio=5 tid=1 NATIVE
01-01 02:29:31.036: INFO/dalvikvm(8970):   | group="main" sCount=0 dsCount=0 s=N obj=0x4001d928 self=0xccd8
01-01 02:29:31.036: INFO/dalvikvm(8970):   | sysTid=8970 nice=0 sched=0/0 cgrp=default handle=-1345017812
01-01 02:29:31.036: INFO/dalvikvm(8970):   | schedstat=( 3072569000 2291321000 12753 )
01-01 02:29:31.036: INFO/dalvikvm(8970):   at com.unity3d.player.UnityPlayer.UnitySendMessage(Native Method)
01-01 02:29:31.036: INFO/dalvikvm(8970):   at com.angrymobgames.userpresent.UserPresentReceiver.onReceive(UserPresentReceiver.java:19)
01-01 02:29:31.036: INFO/dalvikvm(8970):   at android.app.ActivityThread.handleReceiver(ActivityThread.java:2810)
01-01 02:29:31.036: INFO/dalvikvm(8970):   at android.app.ActivityThread.access$3200(ActivityThread.java:125)
01-01 02:29:31.036: INFO/dalvikvm(8970):   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2083)
01-01 02:29:31.036: INFO/dalvikvm(8970):   at android.os.Handler.dispatchMessage(Handler.java:99)
01-01 02:29:31.036: INFO/dalvikvm(8970):   at android.os.Looper.loop(Looper.java:123)
01-01 02:29:31.036: INFO/dalvikvm(8970):   at android.app.ActivityThread.main(ActivityThread.java:4627)
01-01 02:29:31.036: INFO/dalvikvm(8970):   at java.lang.reflect.Method.invokeNative(Native Method)
01-01 02:29:31.036: INFO/dalvikvm(8970):   at java.lang.reflect.Method.invoke(Method.java:521)
01-01 02:29:31.036: INFO/dalvikvm(8970):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-01 02:29:31.036: INFO/dalvikvm(8970):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-01 02:29:31.036: INFO/dalvikvm(8970):   at dalvik.system.NativeStart.main(Native Method)
01-01 02:29:31.036: ERROR/dalvikvm(8970): VM aborting