Here I create a class in JAVA in which I have function (callback) which I must call from C file.
class DSMInitializeClassParameter {
/**
* Callback function for DSM Initialize.
*/
public void DSMInitializeCallback( ) {
// Write Message To Logs.
System.out.println( "Dsm Initialize Callback called." );
}
}
For that I have created native method which must be called.
public class DsmLibraryTest extends Activity {
// Some code ....
// Create a DSMInitializeClassParameter class object.
DSMInitializeClassParameter object = new DSMInitializeClassParameter();
// Call native method with given object.
nativeMethod( object );
// Some code ....
// Implementation of native method.
public native int nativeMethod(DSMInitializeClassParameter classObject);
}
In C file I have following:
dsmResult_t dsmInitializeCall( dsmResult_t status, void * pUserData, dsmEvent_t * hEvent ) {
(*env)->CallVoidMethod(env, classObject, mid);
}
JNIEXPORT jint JNICALL Java_com_Dsm_Test_DsmLibraryTest_nativeMethod(JNIEnv* env, jobject obj, jobject classObject) {
// This function loads a locally-defined class. It searches the directories and zip
// files specified by the CLASSPATH environment variable for the class with the specified name.
jclass cls = (*env)->FindClass( env, "com/Dsm/Test/DSMInitializeClassParameter" );
// Get java Method.
jmethodID mid = (*env)->GetMethodID(env, cls, "DSMInitializeCallback", "()V");
// If no method was found return -1;
if( mid == NULL ) {
return -1;
}
// Call DSM Initialize Callback Function and return value.
return dsmInitialize( dsmInitializeCall, NULL );
}
how you can see I want to call (*env)->CallVoidMethod(env, classObject, mid);
from dsmInitializeCall
function, but how I can call it if I have no env
, classObject
and mid
I try with statics but it not work.
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