My Android NDK project's Java Code calls C++ function ,
extern "C" JNIEXPORT jstring JNICALL Java_com_crimson_tub_MainActivity_stringFromJNI(JNIEnv *env, jobject jo)
I want to call
public static void requestPermissions(@NonNull final Activity activity, @NonNull final String[] permissions, @IntRange(from = 0L) final int requestCode)
found in Android Document:
https://developer.android.com/reference/android/support/v4/app/ActivityCompat.html#requestPermissions(android.app.Activity, java.lang.String[], int)
I have tried few variations of the code where i think the problem is,
jmethodID jmid = env->GetStaticMethodID(clzz,"requestPermissions", "(Landroid/app/Activity;[Ljava/lang/String;I)V;"),
//jmethodID jmid = env->GetStaticMethodID(clzz,"requestPermissions", "(Lcom/company/project/MainActivity;[Ljava/lang/String;I)V;"),
//jmethodID jmid = env->GetStaticMethodID(clzz,"requestPermissions", "(Ljava/lang/Object;[Ljava/lang/String;I)V;"),
all of the above alternatives lead to same exception,
No pending exception expected: java.lang.NoSuchMethodError: no static method "Landroid/support/v4/app/ActivityCompat;.requestPermissions(Landroid/app/Activity;[Ljava/lang/String;I)V;"
c++ code,
extern "C" JNIEXPORT jstring JNICALL
Java_com_crimson_tub_MainActivity_stringFromJNI(JNIEnv *env,jobject jo) {
std::string hello;
jobjectArray ret;
int i;
char *data[2]= { "android.permission.CAMERA" ,
"android.permission-group.CALENDAR"};
ret= (jobjectArray)env->NewObjectArray(2,env->FindClass("java/lang/String"),env->NewStringUTF(""));
for(i=0;i<2;i++) env->SetObjectArrayElement(ret,i,env->NewStringUTF(data[i]));
jint result = 0xffffffff;
jclass clzz = env->FindClass("android/support/v4/app/ActivityCompat");
if (!clzz){
hello += "-class";
}else{
hello += "+class";
}
jmethodID jmid = env->GetStaticMethodID(clzz,"requestPermissions", "(Landroid/app/Activity;[Ljava/lang/String;I)V;"),
//jmethodID jmid = env->GetStaticMethodID(clzz,"requestPermissions", "(Lcom/company/project/MainActivity;[Ljava/lang/String;I)V;"),
//jmethodID jmid = env->GetStaticMethodID(clzz,"requestPermissions", "(Ljava/lang/Object;[Ljava/lang/String;I)V;"),
env->CallStaticVoidMethod(clzz,jmid,jo,ret,result);
env->DeleteGlobalRef(jo);
return env->NewStringUTF(hello.c_str());
}
i would like to be able to call Android Java functions via JNI like,
ActivityCompat.requestPermissions
directly from c++ so later i can remove Java code from my project.
I have been working on this issue for quite a while now and still unsuccessful.
Gratitude towards All the help and it is greatly appreciated.
Thank you all.
Problem was the ; after the V in the signature. now it works. Lol.