我实际上能够通过荷兰广播公司打电话getPackageCodePath,并能够工作。 The following Code set at the first of android_main in the home-active model in NDK r7logs the right path and don tock:

void android_main(struct android_app* state) {
    struct engine engine;

    ANativeActivity* activity = state->activity;
    JNIEnv* env = activity->env;

    jclass clazz = (*env)->GetObjectClass(env, activity->clazz);
    jmethodID methodID = (*env)->GetMethodID(env, clazz, "getPackageCodePath", "()Ljava/lang/String;");
    jobject result = (*env)->CallObjectMethod(env, activity->clazz, methodID);

    const char* str;
    jboolean isCopy;
    str = (*env)->GetStringUTFChars(env, (jstring)result, &isCopy);
    LOGI("Looked up package code path: %s", str);

    ...
}

但我觉得这样可能不是一个伟大的解决办法。 对我有两点担忧:

1. Thread safety - there s an ugly warning about only using the env member of ANativeActivity in the main Java thread, and if I understand things correctly, this code is going to get run in the native activity s thread.
2. ANativeActivity s clazz member appears to be misnamed and is actually the instance of the Java NativeActivity instead of the class object. Otherwise this code wouldn t work. I really hate relying on something that is obviously misnamed like this.

除此之外,它还发挥作用,而且我实际上打算利用它自己,利用校准和数据目录将资产从原木中提取。

Since I just had to search for exactly how to do the attach/detach calls I ll paste the updated version here.

The following seems to get the right location without crashing (after minimal testing)

    ANativeActivity* activity = state->activity;
    JNIEnv* env=0;

    (*activity->vm)->AttachCurrentThread(activity->vm, &env, 0);

    jclass clazz = (*env)->GetObjectClass(env, activity->clazz);
    jmethodID methodID = (*env)->GetMethodID(env, clazz, "getPackageCodePath", "()Ljava/lang/String;");
    jobject result = (*env)->CallObjectMethod(env, activity->clazz, methodID);

    const char* str;
    jboolean isCopy;
    str = (*env)->GetStringUTFChars(env, (jstring)result, &isCopy);
    LOGI("Looked up package code path: %s", str);

    (*activity->vm)->DetachCurrentThread(activity->vm);

能够在2014年修改。

ANativeActivity* activity = state->activity;
JNIEnv* env=0;

activity->vm->AttachCurrentThread(&env, NULL);

jclass clazz = env->GetObjectClass(activity->clazz);
jmethodID methodID = env->GetMethodID(clazz, "getPackageCodePath", "()Ljava/lang/String;");
jobject result = env->CallObjectMethod(activity->clazz, methodID);

jboolean isCopy;
std::string res = env->GetStringUTFChars((jstring)result, &isCopy);
LOG_DEBUG("Looked up package code path: %s", res.c_str());

activity->vm->DetachCurrentThread();

Did you try to read /proc/self/cmdline from your application? You should be able to open it as a normal (as far as proc files are normal :-) so you can read from the file until EOF, but not seek) c FILE and read from it.

作为电话机的一个实例,我可以从 p中看到,申请名称是预期的用名称:

 # ps | grep phone 
 radio     1588  839   1467420 103740 SyS_epoll_ 7f7de374ac S com.android.phone

And checking the cmdline for that pid returns a good app name:

 # cat /proc/1588/cmdline
 com.android.phone

电话:getPackageCodePath() a. 本土方法