godot/modules/mono/utils/android_utils.cpp

/*************************************************************************/
/*  android_utils.cpp                                                    */
/*************************************************************************/
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md)    */
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#include "android_utils.h"

#ifdef __ANDROID__

#include "platform/android/thread_jandroid.h"

namespace GDMonoUtils {
namespace Android {

String get_app_native_lib_dir() {
	JNIEnv *env = ThreadAndroid::get_env();

	jclass activityThreadClass = env->FindClass("android/app/ActivityThread");
	jmethodID currentActivityThread = env->GetStaticMethodID(activityThreadClass, "currentActivityThread", "()Landroid/app/ActivityThread;");
	jobject activityThread = env->CallStaticObjectMethod(activityThreadClass, currentActivityThread);
	jmethodID getApplication = env->GetMethodID(activityThreadClass, "getApplication", "()Landroid/app/Application;");
	jobject ctx = env->CallObjectMethod(activityThread, getApplication);

	jmethodID getApplicationInfo = env->GetMethodID(env->GetObjectClass(ctx), "getApplicationInfo", "()Landroid/content/pm/ApplicationInfo;");
	jobject applicationInfo = env->CallObjectMethod(ctx, getApplicationInfo);
	jfieldID nativeLibraryDirField = env->GetFieldID(env->GetObjectClass(applicationInfo), "nativeLibraryDir", "Ljava/lang/String;");
	jstring nativeLibraryDir = (jstring)env->GetObjectField(applicationInfo, nativeLibraryDirField);

	String result;

	const char *const nativeLibraryDir_utf8 = env->GetStringUTFChars(nativeLibraryDir, NULL);
	if (nativeLibraryDir_utf8) {
		result.parse_utf8(nativeLibraryDir_utf8);
		env->ReleaseStringUTFChars(nativeLibraryDir, nativeLibraryDir_utf8);
	}

	return result;
}

} // namespace Android
} // namespace GDMonoUtils

#endif // __ANDROID__