当我尝试从JNI调用java类中的非静态方法时,我遇到异常。我得到的例外是:
无法在未调用Looper.prepare()
的线程内创建处理程序这是我的JNI呼叫代码:
jclass mClass = env->FindClass("com/secrethq/match3/Match3Activity");
jmethodID constructor = env->GetMethodID( mClass, "<init>", "()V");
CCLog("jClass Located?");
jobject object = env->NewObject(mClass, constructor);
mid = env->GetMethodID(mClass, "onClickPostStatusUpdate", "(I)V");
CCLog("mID: %d", mid);
if (mid!=0)
env->CallVoidMethod(mClass, mid, object, score);
//-----------------------------------------------------------
CCLog("Finish");
if(isAttached)
jvm->DetachCurrentThread();
这是我在java类中的方法:
private void onClickPostStatusUpdate(int score) {
System.out.println("Match3Activity.onClickPostStatusUpdate()");
performPublish(PendingAction.POST_STATUS_UPDATE, canPresentShareDialog);
}
这是Logcat输出:
06-22 20:20:39.342: E/AndroidRuntime(14899): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
06-22 20:20:39.342: E/AndroidRuntime(14899): at android.os.Handler.<init>(Handler.java:121)
06-22 20:20:39.342: E/AndroidRuntime(14899): at android.app.Activity.<init>(Activity.java:772)
06-22 20:20:39.342: E/AndroidRuntime(14899): at org.cocos2dx.lib.Cocos2dxActivity.<init>(Cocos2dxActivity.java:37)
06-22 20:20:39.342: E/AndroidRuntime(14899): at com.secrethq.match3.Match3Activity.<init>(Match3Activity.java:45)
06-22 20:20:39.342: E/AndroidRuntime(14899): at org.cocos2dx.lib.Cocos2dxRenderer.nativeTouchesEnd(Native Method)
06-22 20:20:39.342: E/AndroidRuntime(14899): at org.cocos2dx.lib.Cocos2dxRenderer.handleActionUp(Cocos2dxRenderer.java:129)
06-22 20:20:39.342: E/AndroidRuntime(14899): at org.cocos2dx.lib.Cocos2dxGLSurfaceView$9.run(Cocos2dxGLSurfaceView.java:258)
06-22 20:20:39.342: E/AndroidRuntime(14899): at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1462)
06-22 20:20:39.342: E/AndroidRuntime(14899): at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1240)
答案 0 :(得分:0)
该行:
jobject object = env->NewObject(mClass, constructor);
尝试实例化一个Activity。通常,您不应该手动实例化活动,而是要使用指定的Android API创建它们,例如Context.startActivity
。
通过规避API,您已经陷入了在不支持创建活动的线程中创建活动的情况。
这是导致错误的原因。但是:你可能想重新考虑代码作为一个整体。不确定你要做什么,但看起来你使用的模式并不合适。