我有以下JNI方法,它当前调用静态Java方法:
void bindToMarketBillingServiceJNI(const char * inappID)
{
JniMethodInfo t;
if (JniHelper::getStaticMethodInfo(t
, "com/mycompany/games/js/TestsDemo"
, "bindToMarketBillingService"
, "(Ljava/lang/String;)V"))
{
jstring stringArg1;
if (! inappID)
{
stringArg1 = t.env->NewStringUTF("1");
}
else
{
stringArg1 = t.env->NewStringUTF(inappID);
}
t.env->CallStaticVoidMethod(t.classID, t.methodID, stringArg1);
t.env->DeleteLocalRef(stringArg1);
t.env->DeleteLocalRef(t.classID);
}
}
这是我的Java方法:
public static void bindToMarketBillingService(final String mSku)
{
// Some code....
}
一切正常。
但是现在,我想让我的Java方法为NON STATIC。我以为我必须改变:
但它崩溃了......(下面的崩溃日志)
有人知道如何解决这个问题吗?
谢谢!
08-20 11:54:11.009: A/libc(9379): Fatal signal 11 (SIGSEGV) at 0x0c1f4072 (code=1)
08-20 11:54:11.109: D/dalvikvm(31592): GC_CONCURRENT freed 735K, 12% free 9743K/10951K, paused 4ms+7ms
08-20 11:54:11.184: D/dalvikvm(1976): GC_CONCURRENT freed 1720K, 35% free 28243K/43399K, paused 5ms+13ms
08-20 11:54:11.194: I/ApplicationPolicy(1976): getActualApplicationStateEnabled() : true
08-20 11:54:11.219: D/PJ_MainApplication(9698): onApplicationCreate -> Now
08-20 11:54:11.334: D/dalvikvm(31592): GC_CONCURRENT freed 273K, 9% free 9981K/10951K, paused 3ms+3ms
08-20 11:54:11.409: D/PJ_CrashManager(9698): registerHandler -> Current handler class = com.android.internal.os.RuntimeInit$UncaughtHandler
08-20 11:54:11.469: I/DEBUG(9331): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
08-20 11:54:11.469: I/DEBUG(9331): Build fingerprint: 'samsung/GT-I9100/GT-I9100:4.0.3/IML74K/XWLPG:user/release-keys'
08-20 11:54:11.469: I/DEBUG(9331): pid: 9379, tid: 9403 >>> com.audioguidia.games.js <<<
08-20 11:54:11.469: I/DEBUG(9331): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0c1f4072
08-20 11:54:11.474: I/DEBUG(9331): r0 00000000 r1 10000000 r2 fffffffc r3 4cbb9ef0
08-20 11:54:11.474: I/DEBUG(9331): r4 00273f98 r5 4c7f7fc4 r6 51134ad4 r7 415077f8
08-20 11:54:11.474: I/DEBUG(9331): r8 00000001 r9 0c1f4071 10 4cbb9ee4 fp 51134a58
08-20 11:54:11.474: I/DEBUG(9331): ip ffffffec sp 51134a58 lr 4096864d pc 40968aac cpsr 00000030
08-20 11:54:11.474: I/DEBUG(9331): d0 0000000000000000 d1 3f80000000000000
08-20 11:54:11.474: I/DEBUG(9331): d2 0000000000000000 d3 0000000000000000
08-20 11:54:11.474: I/DEBUG(9331): d4 0000000000000000 d5 3f80000000000000
etc....
答案 0 :(得分:8)
仅更改env
对象上的调用是不够的。
首先,您的新实例方法应该在Java类中声明,如:public void myMethod(...)
(即此处没有static
个关键字)。
其次,您需要一个java对象引用来调用实例方法,而不仅仅是类。即你会做类似的事情(请注意我使用的是C语法):
jmethodID midCallBack = (*env)->GetMethodID(env, thisClass, "myMethod", "()V");
if (NULL == midCallBack) return;
// Call back the method (which returns void), based on the Method ID
(*env)->CallVoidMethod(env, thisObj, midCallBack);
请参阅this link上的“5.3回调实例方法和静态方法”部分以获取更多信息
答案 1 :(得分:2)
如果要调用非静态方法,则必须创建该类的对象,然后才调用成员方法。代码看起来像这样
jmethodID constructor = env->GetMethodID(cls, "<init>", "()V"); //this is for defaul c-tor
jobject object = env->NewObject(cls, constructor);
//getting your method id
env->CallVoidMethod(object, methodId/*,your parameters*/);
答案 2 :(得分:0)
我刚刚在java中创建了一个非静态方法的静态方法:
static public void startActivity() {
try {
Activity mother = QtNative.activity();
Intent intent = new Intent(mother, MainActivity.class);
mother.startActivity(intent);
} catch (Exception e) {
Log.e(msgTag, e.toString());
e.printStackTrace();
}
}
我从C ++那里打来电话:
void FacebookAndroid::startAndroidFacebook() {
QAndroidJniObject::callStaticMethod<void>("org.qtproject.example.MainActivity",
"startFacebookActivity",
"()V");
}