JNI代码问题format specifies type ‘long long‘ but the argument has type ‘jlong‘ (aka ‘long‘)的解决办法

今天在虚拟机ubuntu18.04上编译AOSP，因为加了个ALOGE输出一些日志，涉及到JNI的变量，明明设置的都是long类型，但是一直报错。

问题：

format specifies type ‘long long’ but the argument has type ‘jlong’ (aka ‘long’)

    static void android_view_JniTest_nChangeFactorDown(JNIEnv *env, jobject clazz, jlong down) {
        nFactorDown = down;
        ALOGE("MyTest: JNI: Write FactorDown: %ld", down);
    }

解决：

起初想着报错提示类型不对，改成%lld总行了吧，没想到它反过来报错：

format specifies type ‘long’ but the argument has type ‘jlong’ (aka ‘long long’)

最后干脆直接来个强制转换解决问题，特发此贴留给遇到同样问题的朋友。

    static void android_view_JniTest_nChangeFactorDown(JNIEnv *env, jobject clazz, jlong down) {
        nFactorDown = down;
        ALOGE("MyTest: JNI: Write FactorDown: %ld", (long)down);
    }