如何在kotlin本族语中保存va_list

Question

当我使用kotlin本机构建android所以，并且我想在本地创建Bitmap对象时，我通过反射来实现：

val bitmapClass = env.pointed.pointed?.FindClass?.invoke(env, "android/graphics/Bitmap".cstr.ptr)
val creatBitmapFunction = env.pointed.pointed?.GetStaticMethodID?.invoke(env, bitmapClass, "createBitmap".cstr.ptr, "(IILandroid/graphics/Bitmap\$Config;)Landroid/graphics/Bitmap;".cstr.ptr)
val configName = env.pointed.pointed?.NewStringUTF?.invoke(env, "ARGB_8888".cstr.ptr)
val bitmapConfigClass = env.pointed.pointed?.FindClass?.invoke(env, "android/graphics/Bitmap\$Config".cstr.ptr)
....

但是当我调用Bitmap.createBitmap来创建对象时，

public static Bitmap createBitmap(@NonNull @ColorInt int[] colors,
            int width, int height, Config config)

我不得不叫"CallStaticObjectMethodV“：

public final var CallStaticObjectMethodV: kotlinx.cinterop.CPointer<kotlinx.cinterop.CFunction<(kotlinx.cinterop.CPointer<platform.android.JNIEnvVar /* = kotlinx.cinterop.CPointerVarOf<platform.android.JNIEnv /* = kotlinx.cinterop.CPointer<platform.android.JNINativeInterface> */> */>?, platform.android.jclass? /* = kotlinx.cinterop.CPointer<out kotlinx.cinterop.CPointed>? */, platform.android.jmethodID? /* = kotlinx.cinterop.CPointer<cnames.structs._jmethodID>? */, kotlinx.cinterop.CValue<platform.posix.va_list /* = platform.posix.__va_list */>) -> platform.android.jobject? /* = kotlinx.cinterop.CPointer<out kotlinx.cinterop.CPointed>? */>>? /* compiled code */

我不知道如何创建CValue<platform.posix.va_list)或va_list。

Answer 1

我已经解决了这个问题。函数CallStaticObjectMethodA和CallStaticObjectMethodV把我搞糊涂了。我认为CallStaticObjectMethodA只能传递一个参数，而CallStaticObjectMethodV可以传递多个参数。这是错误的。在传递CPoint<jvalue>时，我们可以使用CArrayPoint<jvalue>而不是CPoint<jvalue>。CArrayPoint是CPoint的子类。正如我所做的那样，我可以将多个参数传递给CallStaticObjectMethodA

fun getJValues(arguments:Array<out Any?>):CPoint<jvalue>{
    memscope{
        val result = scope.allocArray(arguments.size)
        arguments.mapIndexed{index, it ->
            .....
        }
        return result
    }

}