如何在安卓应用程序中使用C++构建器写入文件？

#include <fstream>
#include <jni.h>

extern "C" {
    JNIEXPORT void JNICALL Java_com_example_app_Builder_writeToFile(JNIEnv* env, jobject obj, jstring data) {
        const char* dataStr = env->GetStringUTFChars(data, NULL);
        std::ofstream file("example.txt");
        file << dataStr;
        file.close();
        env->ReleaseStringUTFChars(data, dataStr);
    }
}

package com.example.app;

public class Builder {
    static {
        System.loadLibrary("builder");
    }

    public native void writeToFile(String data);
}

Builder builder = new Builder();
builder.writeToFile("Hello, World!");