APK TOOL

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
 tools:context=".MainActivity">
<Button
 android:id="@+id/selectApkButton"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:text="Select APK" />
<TextView
 android:id="@+id/selectedFilePath"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:text="No file selected" />
<Button
 android:id="@+id/decompileButton"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:text="Decompile APK" />
<Button
 android:id="@+id/recompileButton"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:text="Recompile APK" />
</LinearLayout>

Kotlin
package com.example.apktool
import android.app.Activity
import android.content.Intent
import android.net.Uri
import android.os.Bundle
import android.provider.OpenableColumns
import android.widget.Button
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import java.io.File
import java.io.InputStream
import java.io.OutputStream
class MainActivity : AppCompatActivity() {
private val PICK_APK_FILE = 1
 private lateinit var selectedFilePath: TextView
 private lateinit var apkFile: File
override fun onCreate(savedInstanceState: Bundle?) {
 super.onCreate(savedInstanceState)
 setContentView(R.layout.activity_main)
val selectApkButton: Button = findViewById(R.id.selectApkButton)
 selectedFilePath = findViewById(R.id.selectedFilePath)
 val decompileButton: Button = findViewById(R.id.decompileButton)
 val recompileButton: Button = findViewById(R.id.recompileButton)
selectApkButton.setOnClickListener {
 val intent = Intent(Intent.ACTION_GET_CONTENT)
 intent.type = "application/vnd.android.package-archive"
 startActivityForResult(intent, PICK_APK_FILE)
 }
decompileButton.setOnClickListener {
 // Decompile işlemini başlatın
 }
recompileButton.setOnClickListener {
 // Recompile işlemini başlatın
 }
 }
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
 super.onActivityResult(requestCode, resultCode, data)
 if (requestCode == PICK_APK_FILE && resultCode == Activity.RESULT_OK) {
 val uri: Uri? = data?.data
 uri?.let {
 val fileName = getFileName(uri)
 val inputStream: InputStream? = contentResolver.openInputStream(uri)
 val file = File(cacheDir, fileName)
 val outputStream: OutputStream = file.outputStream()
 inputStream?.copyTo(outputStream)
 inputStream?.close()
 outputStream.close()
 apkFile = file
 selectedFilePath.text = apkFile.path
 }
 }
 }
private fun getFileName(uri: Uri): String {
 var result: String? = null
 if (uri.scheme == "content") {
 contentResolver.query(uri, null, null, null, null)?.use { cursor ->
 if (cursor.moveToFirst()) {
 result = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME))
 }
 }
 }
 if (result == null) {
 result = uri.path
 val cut = result!!.lastIndexOf('/')
 if (cut != -1) {
 result = result!!.substring(cut + 1)
 }
 }
 return result!!
 }
}

cmake
cmake_minimum_required(VERSION 3.4.1)
add_library(native-lib SHARED
 src/main/cpp/native-lib.cpp)
find_library(log-lib log)
target_link_libraries(native-lib ${log-lib})

#include <jni.h>
#include <string>
#include <cstdlib>
extern "C" JNIEXPORT jstring JNICALL
Java_com_example_apktool_MainActivity_stringFromJNI(JNIEnv* env, jobject /* this */) {
 std::string hello = "Hello from C++";
 return env->NewStringUTF(hello.c_str());
}
extern "C" JNIEXPORT void JNICALL
Java_com_example_apktool_MainActivity_decompileApk(JNIEnv *env, jobject /* this */, jstring apkPath) {
 const char *path = env->GetStringUTFChars(apkPath, nullptr);
 // apktool komutunu çalıştırın
 std::string command = "apktool d " + std::string(path);
 system(command.c_str());
 env->ReleaseStringUTFChars(apkPath, path);
}
extern "C" JNIEXPORT void JNICALL
Java_com_example_apktool_MainActivity_recompileApk(JNIEnv *env, jobject /* this */, jstring directoryPath) {
 const char *path = env->GetStringUTFChars(directoryPath, nullptr);
 // apktool komutunu çalıştırın
 std::string command = "apktool b " + std::string(path);
 system(command.c_str());
 env->ReleaseStringUTFChars(directoryPath, path);
}

class MainActivity : AppCompatActivity() {
// Native fonksiyonları bildir
 external fun stringFromJNI(): String
 external fun decompileApk(apkPath: String)
 external fun recompileApk(directoryPath: String)
// Statik blokta native kütüphaneleri yükle
 companion object {
 init {
 System.loadLibrary("native-lib")
 }
 }
override fun onCreate(savedInstanceState: Bundle?) {
 // onCreate fonksiyonu burada
 }
private fun decompileApkFile() {
 val apkPath = apkFile.path
 decompileApk(apkPath)
 }
private fun recompileApkFile() {
 val directoryPath = apkFile.parent
 recompileApk(directoryPath)
 }
}