我在 JNI 中面临一个微不足道的（我相信）问题，即将一个 Integer 对象从 C 传递到 Java 。
这是非常简单的代码
public class CallByNative {
public CallByNative(int a )
{
System.out.println("Constructor caleld");
}
public Integer objectMethod(Integer a )
{
System.out.println("object method");
return 1;
}
}
现在，当我尝试通过以下代码调用objectMethod时，我的代码崩溃了
jobject Java_com_example_hellojni_HelloJni_callbackJava(JNIEnv * env, jobject this) {
/*Initialize Class*/
jclass cls = (*env)->FindClass(env, "com/example/hellojni/CallByNative");
jmethodID methodID = (*env)->GetMethodID(env, cls, "<init>", "(I)V");
jobject thisObj=(*env)->NewObject(env,cls, methodID, 5);
jmethodID meth1 = (*env)->GetMethodID(env,cls, "objectMethod", "(Ljava/lang/Integer;)Ljava/lang/Integer;");
number=10; // can't send this to java , since this is a primitive type I.E int .
//Construct an int object
jclass clsInt = (*env)->FindClass(env, "java/lang/Integer");
jmethodID methodID1 = (*env)->GetMethodID(env, clsInt , "<init>", "(I)V");
jobject intObject= (*env)->NewObject(clsInt, methodID1, number);
jstring str=(jstring) (*env)->CallObjectMethod(env,cls,meth1,intObject);
__android_log_print(ANDROID_LOG_DEBUG, DEBUG_TAG, "NDK: Value returned from java: [%s]", str);
return thisObj;
}
当它命中时，我会受到这个无信息的堆栈跟踪的欢迎。
1
12-14 18:40:59.534: I/System.out(1088): Debugger has connected
12-14 18:40:59.534: I/System.out(1088): waiting for debugger to settle...
12-14 18:40:59.734: I/System.out(1088): waiting for debugger to settle...
12-14 18:40:59.934: I/System.out(1088): waiting for debugger to settle...
12-14 18:41:00.136: I/System.out(1088): waiting for debugger to settle...
12-14 18:41:00.334: I/System.out(1088): waiting for debugger to settle...
12-14 18:41:00.534: I/System.out(1088): waiting for debugger to settle...
12-14 18:41:00.734: I/System.out(1088): waiting for debugger to settle...
12-14 18:41:00.934: I/System.out(1088): waiting for debugger to settle...
12-14 18:41:01.194: I/System.out(1088): debugger has settled (1370)
12-14 18:41:01.814: D/dalvikvm(1088): Trying to load lib /data/data/com.example.hellojni/lib/libhello-jni.so 0x45ebe098
12-14 18:41:01.814: D/dalvikvm(1088): Added shared lib /data/data/com.example.hellojni/lib/libhello-jni.so 0x45ebe098
12-14 18:41:01.814: D/dalvikvm(1088): No JNI_OnLoad found in /data/data/com.example.hellojni/lib/libhello-jni.so 0x45ebe098, skipping init
12-14 18:41:01.854: I/System.out(1088): 31
12-14 18:41:01.886: I/System.out(1088): Hello. This is a test sentence.
12-14 18:41:01.904: I/System.out(1088): Hello. This is a test sentence.This is appended
12-14 18:41:01.914: I/System.out(1088): Constructor caleld
12-14 18:41:02.094: I/DEBUG(31): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
12-14 18:41:02.094: I/DEBUG(31): Build fingerprint: 'generic/sdk/generic/:2.2/FRF91/43546:eng/test-keys'
12-14 18:41:02.114: I/DEBUG(31): pid: 1088, tid: 1088 >>> com.example.hellojni <<<
12-14 18:41:02.114: I/DEBUG(31): signal 11 (SIGSEGV), fault addr 0000000a
12-14 18:41:02.114: I/DEBUG(31): r0 0000000a r1 00000007 r2 80886910 r3 00000088
12-14 18:41:02.114: I/DEBUG(31): r4 0000aa50 r5 45ec5dc0 r6 00000007 r7 45ec5e68
12-14 18:41:02.114: I/DEBUG(31): r8 42297820 r9 4208bcb4 10 0000ce04 fp 4208bcb0
12-14 18:41:02.114: I/DEBUG(31): ip 808882a4 sp bebab848 lr 809010ef pc 80901024 cpsr 00000030
12-14 18:41:02.204: I/DEBUG(31): #00 pc 00001024 /data/data/com.example.hellojni/lib/libhello-jni.so
12-14 18:41:02.204: I/DEBUG(31): #01 lr 809010ef /data/data/com.example.hellojni/lib/libhello-jni.so
12-14 18:41:02.204: I/DEBUG(31): code around pc:
12-14 18:41:02.204: I/DEBUG(31): 80901004 1c026823 6f1e1c29 23051c20 bd7047b0
12-14 18:41:02.204: I/DEBUG(31): 80901014 00001842 00001848 0000184c 1c0eb5f8
12-14 18:41:02.204: I/DEBUG(31): 80901024 490c6803 699b1c04 47984479 1c054a0a
12-14 18:41:02.214: I/DEBUG(31): 80901034 68204b0a 447a2184 447b5847 1c201c29
12-14 18:41:02.214: I/DEBUG(31): 80901044 682347b8 1c291c02 1c206f1f 47b81c33
12-14 18:41:02.214: I/DEBUG(31): code around lr:
12-14 18:41:02.214: I/DEBUG(31): 809010cc 682147e0 4b164a15 447a598e 447b1c29
12-14 18:41:02.214: I/DEBUG(31): 809010dc 47b01c20 23886822 200a4680 f7ff58d6
12-14 18:41:02.214: I/DEBUG(31): 809010ec 1c29ff99 46421c03 47b01c20 4a0e490d
12-14 18:41:02.214: I/DEBUG(31): 809010fc 44791c03 2003447a eec0f7ff bc041c38
12-14 18:41:02.214: I/DEBUG(31): 8090110c bdf04690 46c0e7fb 000017de 000017be
12-14 18:41:02.214: I/DEBUG(31): stack:
12-14 18:41:02.214: I/DEBUG(31): bebab808 42297768 /dev/ashmem/dalvik-LinearAlloc (deleted)
12-14 18:41:02.214: I/DEBUG(31): bebab80c 80902890 /data/data/com.example.hellojni/lib/libhello-jni.so
12-14 18:41:02.214: I/DEBUG(31): bebab810 0000ccb0 [heap]
12-14 18:41:02.214: I/DEBUG(31): bebab814 0000ccb0 [heap]
12-14 18:41:02.214: I/DEBUG(31): bebab818 00000063
12-14 18:41:02.214: I/DEBUG(31): bebab81c 80841a6d /system/lib/libdvm.so
12-14 18:41:02.214: I/DEBUG(31): bebab820 0000aa50 [heap]
12-14 18:41:02.214: I/DEBUG(31): bebab824 45ec5dc0 /dev/ashmem/mspace/dalvik-heap/2 (deleted)
12-14 18:41:02.224: I/DEBUG(31): bebab828 80902880 /data/data/com.example.hellojni/lib/libhello-jni.so
12-14 18:41:02.224: I/DEBUG(31): bebab82c 80831d81 /system/lib/libdvm.so
12-14 18:41:02.224: I/DEBUG(31): bebab830 00000000
12-14 18:41:02.224: I/DEBUG(31): bebab834 8086dd20 /system/lib/libdvm.so
12-14 18:41:02.224: I/DEBUG(31): bebab838 bebab85c [stack]
12-14 18:41:02.224: I/DEBUG(31): bebab83c bebab85c [stack]
12-14 18:41:02.224: I/DEBUG(31): bebab840 df002777
12-14 18:41:02.224: I/DEBUG(31): bebab844 e3a070ad
12-14 18:41:02.224: I/DEBUG(31): #00 bebab848 00000088
12-14 18:41:02.224: I/DEBUG(31): bebab84c 0000aa50 [heap]
12-14 18:41:02.224: I/DEBUG(31): bebab850 45ec5dc0 /dev/ashmem/mspace/dalvik-heap/2 (deleted)
12-14 18:41:02.224: I/DEBUG(31): bebab854 80836f71 /system/lib/libdvm.so
12-14 18:41:02.224: I/DEBUG(31): bebab858 45ec5e68 /dev/ashmem/mspace/dalvik-heap/2 (deleted)
12-14 18:41:02.224: I/DEBUG(31): bebab85c 809010ef /data/data/com.example.hellojni/lib/libhello-jni.so
12-14 18:41:02.234: I/DEBUG(31): bebab860 bebab878 [stack]
12-14 18:41:02.234: I/DEBUG(31): bebab864 bebab898 [stack]
12-14 18:41:02.234: I/DEBUG(31): bebab868 00000004
12-14 18:41:02.234: I/DEBUG(31): bebab86c 4816eb43 /data/dalvik-cache/data@app@com.example.hellojni-1.apk@classes.dex
12-14 18:41:02.234: I/DEBUG(31): bebab870 4208bcbc
12-14 18:41:02.234: I/DEBUG(31): bebab874 80813978 /system/lib/libdvm.so
12-14 18:41:02.234: I/DEBUG(31): bebab878 42296af4 /dev/ashmem/dalvik-LinearAlloc (deleted)
12-14 18:41:02.234: I/DEBUG(31): bebab87c 0000ccb0 [heap]
12-14 18:41:02.234: I/DEBUG(31): bebab880 4816eb43 /data/dalvik-cache/data@app@com.example.hellojni-1.apk@classes.dex
12-14 18:41:02.234: I/DEBUG(31): bebab884 bebab980 [stack]
12-14 18:41:02.234: I/DEBUG(31): bebab888 42296bf8 /dev/ashmem/dalvik-LinearAlloc (deleted)
12-14 18:41:02.234: I/DEBUG(31): bebab88c 00000374
12-14 18:41:02.705: I/BootReceiver(59): Copying /data/tombstones/tombstone_07 to DropBox (SYSTEM_TOMBSTONE)
12-14 18:41:02.724: D/Zygote(33): Process 1088 terminated by signal (11)
12-14 18:41:02.724: I/ActivityManager(59): Process com.example.hellojni (pid 1088) has died.
请帮我