java原生界面 - Android和JNI_OnLoad导致设备崩溃

Question

我对在Android上使用JNI很陌生，我一直在编写一个需要实现JNI_OnLoad的应用程序。。我仔细阅读了互联网寻求帮助，似乎有很多不同的文档在如何实现该功能方面存在冲突。尽管如此，我还是采用了一种方法，该方法似乎在我的模拟器上有效，但在我的设备上无效。

LogCat生成以下内容：

D/dalvikvm(11317): Trying to load lib /data/app/libHelloAndroid.so 0xb6db9f50
D/dalvikvm(11317): Added shared lib /data/app/libHelloAndroid.so 0xb6db9f50
I/DEBUG   ( 1244): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
I/DEBUG   ( 1244): Build fingerprint: 'generic/mfld_cdk/mfld_cdk:2.3.3/GRI40/eng.gerrit2.20110607.120237:eng/test-keys'
I/DEBUG   ( 1244): pid: 11317, tid: 11317  >>> com.example.helloandroid <<<
I/DEBUG   ( 1244): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 00000001
I/DEBUG   ( 1244):  eax 09353b90  ebx 8293910c  ecx 00000300  edx 00000001
I/DEBUG   ( 1244):  esi 094313e0  edi 84400395
I/DEBUG   ( 1244):  xcs 00000073  xds 0000007b  xes 0000007b  xfs 00000000 xss 0000007b
I/DEBUG   ( 1244):  eip 8440039d  ebp bf859e70  esp bf859e00  flags 00010206
I/DEBUG   ( 1244): #00 
I/DEBUG   ( 1244):     eip: 8440039d  /data/app/libHelloAndroid.so (JNI_OnLoad)
I/DEBUG   ( 1244): #01 
I/DEBUG   ( 1244):     eip: 828a8df9  /system/lib/libdvm.so (Dalvik_java_lang_Runtime_nativeLoad)
I/DEBUG   ( 1244): #02 
I/DEBUG   ( 1244):     eip: 82831cd9  /system/lib/libdvm.so
I/DEBUG   ( 1244): #03 
I/DEBUG   ( 1244):     eip: b680ec7c  
I/DEBUG   ( 1244): #04 
I/DEBUG   ( 1244):     eip: 0004011a  
I/DEBUG   ( 1244): #05 
I/DEBUG   ( 1244):     eip: ffffffff  
I/DEBUG   ( 1244): #06 
I/DEBUG   ( 1244):     eip: ffffffff  
I/DEBUG   ( 1244): #07 
I/DEBUG   ( 1244):     eip: ffffffff  
I/DEBUG   ( 1244): stack: 
I/DEBUG   ( 1244): #00 
I/DEBUG   ( 1244):     bf859e00  a901b083  
I/DEBUG   ( 1244):     bf859e04  8287da14  /system/lib/libdvm.so (dvmLoadNativeCode)
I/DEBUG   ( 1244):     bf859e08  09353b90  [heap] (dvmLoadNativeCode)
I/DEBUG   ( 1244):     bf859e0c  00000000   (dvmLoadNativeCode)
I/DEBUG   ( 1244):     bf859e10  8291f9bf  /system/lib/libdvm.so
I/DEBUG   ( 1244):     bf859e14  094313e0  [heap]
I/DEBUG   ( 1244):     bf859e18  b6db9f50  /dev/ashmem/dalvik-heap (deleted)
I/DEBUG   ( 1244):     bf859e1c  8293910c  /system/lib/libdvm.so
I/DEBUG   ( 1244):     bf859e20  bf859e70  [stack]
I/DEBUG   ( 1244):     bf859e24  82888b77  /system/lib/libdvm.so (dvmCreateCstrFromString)
I/DEBUG   ( 1244):     bf859e28  0000001d   (dvmCreateCstrFromString)
I/DEBUG   ( 1244):     bf859e2c  bf859ea0  [stack] (dvmCreateCstrFromString)
I/DEBUG   ( 1244):     bf859e30  b632ea84  /dev/ashmem/dalvik-LinearAlloc (deleted) (dvmCreateCstrFromString)
I/DEBUG   ( 1244):     bf859e34  00000001   (dvmCreateCstrFromString)
I/DEBUG   ( 1244):     bf859e38  00000000   (dvmCreateCstrFromString)
I/DEBUG   ( 1244):     bf859e3c  09431418  [heap] (dvmCreateCstrFromString)
I/DEBUG   ( 1244):     ......  ......  
I/DEBUG   ( 1244): #01 
I/DEBUG   ( 1244):     bf859e74  828a8df9  /system/lib/libdvm.so (Dalvik_java_lang_Runtime_nativeLoad)
I/DEBUG   ( 1244):     bf859e78  094313e0  [heap] (Dalvik_java_lang_Runtime_nativeLoad)
I/DEBUG   ( 1244):     bf859e7c  b6db9f50  /dev/ashmem/dalvik-heap (deleted) (Dalvik_java_lang_Runtime_nativeLoad)
I/DEBUG   ( 1244):     bf859e80  bf859e94  [stack] (Dalvik_java_lang_Runtime_nativeLoad)
I/DEBUG   ( 1244):     bf859e84  b55611c2  /data/dalvik-cache/data@[e-mail]@classes.dex (Dalvik_java_lang_Runtime_nativeLoad)
I/DEBUG   ( 1244):     bf859e88  8289ac09  /system/lib/libdvm.so (dvmGetCaller2Class)
I/DEBUG   ( 1244):     bf859e8c  8293910c  /system/lib/libdvm.so (dvmGetCaller2Class)
I/DEBUG   ( 1244):     bf859e90  bf859eb0  [stack] (dvmGetCaller2Class)
I/DEBUG   ( 1244):     bf859e94  00000000   (dvmGetCaller2Class)
I/DEBUG   ( 1244):     bf859e98  b680ec3c   (dvmGetCaller2Class)
I/DEBUG   ( 1244):     bf859e9c  b680eb78   (dvmGetCaller2Class)
I/DEBUG   ( 1244):     bf859ea0  094314e0  [heap] (dvmGetCaller2Class)
I/DEBUG   ( 1244):     bf859ea4  00000020   (dvmGetCaller2Class)
I/DEBUG   ( 1244):     bf859ea8  b5fa27fc  /data/dalvik-cache/system@[e-mail]@classes.dex (dvmGetCaller2Class)
I/DEBUG   ( 1244):     bf859eac  b680ec24   (dvmGetCaller2Class)
I/DEBUG   ( 1244):     bf859eb0  bf859f50  [stack] (dvmGetCaller2Class)
I/DEBUG   ( 1244):     ......  ......  
I/DEBUG   ( 1244): #02 
I/DEBUG   ( 1244):     bf859eb4  82831cd9  /system/lib/libdvm.so
I/DEBUG   ( 1244):     bf859eb8  b680ec04  
I/DEBUG   ( 1244):     bf859ebc  bf859f58  [stack]
I/DEBUG   ( 1244):     bf859ec0  b63f8f60  /dev/ashmem/dalvik-LinearAlloc (deleted)
I/DEBUG   ( 1244):     bf859ec4  09355e68  [heap]
I/DEBUG   ( 1244):     bf859ec8  b6dbcfa8  /dev/ashmem/dalvik-heap (deleted)
I/DEBUG   ( 1244):     bf859ecc  09355e68  [heap]
I/DEBUG   ( 1244):     bf859ed0  b680ebec  
I/DEBUG   ( 1244):     bf859ed4  09355e68  [heap]
I/DEBUG   ( 1244):     bf859ed8  bf859f4c  [stack]
I/DEBUG   ( 1244):     bf859edc  00000000  
I/DEBUG   ( 1244):     bf859ee0  82c03d68  
I/DEBUG   ( 1244):     bf859ee4  00002000  
I/DEBUG   ( 1244):     bf859ee8  bf859e14  [stack]
I/DEBUG   ( 1244):     bf859eec  bf859f50  [stack]
I/DEBUG   ( 1244):     bf859ef0  bf859f50  [stack]
I/DEBUG   ( 1244):     ......  ......  
I/DEBUG   ( 1244): #03 
I/DEBUG   ( 1244): #04 
I/DEBUG   ( 1244):     b5560980  0004011a  
I/DEBUG   ( 1244):     b5560984  00022071  
I/DEBUG   ( 1244):     b5560988  001a0010  
I/DEBUG   ( 1244):     b556098c  10710001  
I/DEBUG   ( 1244):     b5560990  00000027  
I/DEBUG   ( 1244):     b5560994  0034001a  
I/DEBUG   ( 1244):     b5560998  0035011a  
I/DEBUG   ( 1244):     b556099c  00022071  
I/DEBUG   ( 1244):     b55609a0  000e0010  
I/DEBUG   ( 1244):     b55609a4  00010002  
I/DEBUG   ( 1244):     b55609a8  00000002  
I/DEBUG   ( 1244):     b55609ac  00001358  
I/DEBUG   ( 1244):     b55609b0  0000000b  
I/DEBUG   ( 1244):     b55609b4  00001070  
I/DEBUG   ( 1244):     b55609b8  00220001  
I/DEBUG   ( 1244):     b55609bc  2070000c  
I/DEBUG   ( 1244):     ......  ......  
I/DEBUG   ( 1244): #05 
I/DEBUG   ( 1244): #06 
I/DEBUG   ( 1244): #07 

以下是我的JNI_OnLoad实现。。。

JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *vm, void *reserved)
{
    LOGI("Executing JNI_OnLoad");

    JNIEnv *env;
    jint onLoad_err = -1;
    jclass k;
    static const char* const strClassName="com/example/helloandroid/HelloAndroid";
    cached_jvm = vm;
    // Checks JNI version
    if((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_4) != JNI_OK){
        LOGE("JNI Check failure");
        return onLoad_err;
    }
    // Checks if environment is null
    if (env == NULL) {
        LOGE("Env is NULL");
        return onLoad_err;
    }
    k = (*env)->FindClass(env, strClassName);
    if(k == NULL){
        LOGE("Find Class returns NULL");
        return onLoad_err;
    }
    if ((*env)->RegisterNatives(env, k, methods, sizeof(methods)/sizeof(methods[0])) != JNI_OK){
        LOGE("Method registration failure");
        return onLoad_err;
    }
    LOGI("Successfully executed JNI_onLoad");
    return JNI_VERSION_1_4;
}

本机代码是否有某些特定之处，使其在模拟器上的操作与在实际设备上的操作不同？还是我需要在JNI_OnLoad中做更多的工作？

提前感谢！

Answer 1

在模拟器上尚未完成的设备上运行无需执行任何操作。

我从您的日志中注意到，您的设备是x86类型的设备。模拟器是一个ARM处理器。。。您是否正在尝试在设备上运行ARM代码或x86代码？