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fun <T> convertJsonStringToObject(jsonString: String?, objectClass: Class<T>?): T {
    return Gson().fromJson(jsonString, objectClass)
}

fun <T> convertJsonStringToObjectList(jsonString: String): List<T> {
    return Gson().fromJson(jsonString, object : TypeToken<List<T?>?>() {}.type)
}

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const val REQUEST_EXTERNAL_STORAGE = 1001

fun isStoragePermissionGranted(context: Context, activity: Activity): Boolean {
    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (ContextCompat.checkSelfPermission(
                context, Manifest.permission.READ_EXTERNAL_STORAGE
            ) == PackageManager.PERMISSION_GRANTED
        ) {
            // Permission is granted
            true

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fun convertImageToBase64(imageFile: File): String {
    return ByteArrayOutputStream().use { outputStream ->
        Base64OutputStream(outputStream, Base64.DEFAULT).use { base64FilterStream ->
            imageFile.inputStream().use { inputStream ->
                inputStream.copyTo(base64FilterStream)
            }
        }
        return@use outputStream.toString()
    }
}

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<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="oval">
    <solid android:color="@color/numbersCircleBG" />
    <size
        android:width="120dp"
        android:height="120dp" />
</shape>

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 <application
        ...
        android:theme="@style/AppTheme">
        <activity
            android:name=".ui.main.MainActivity"
            android:label="@string/app_name" />
        <activity
            android:name=".ui.main.SplashScreenActivity"
            android:configChanges="orientation|keyboardHidden|screenSize"
            android:theme="@style/FullscreenTheme">

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open class BaseActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val configuration: Configuration = resources.configuration
        configuration.setLayoutDirection(Locale("fa"))
        resources.updateConfiguration(configuration, resources.displayMetrics)
    }
}

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import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.util.Log;


public class SharePrefUtils {

    //list of your keys here
    public static final String IS_FIRST_LAUNCH = "is first launch";

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abstract class BaseAdapter<T>(private val itemClickListener: OnItemClickListener<T>) :
    RecyclerView.Adapter<BaseAdapter<T>.MyViewHolder>() {

    interface OnItemClickListener<T> {
        fun onItemClick(item: T)
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
        val binding = DataBindingUtil.inflate<ViewDataBinding>(
            LayoutInflater.from(parent.context),

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public class CustomeRecyclerViewAdapter extends RecyclerView.Adapter<CustomeRecyclerViewAdapter.CustomViewHolder> {

    private Context mContext;
    private List<T> dataList = new ArrayList<>();
    private OnItemClickedListener onItemClickedListener;

    // for load more
    private final int VIEW_TYPE_ITEM = 0;
    private final int VIEW_TYPE_LOADING = 1;
    private OnLoadMoreListener onLoadMoreListener;

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public class ResponseWrapper<T> {

    @NonNull
    private Status status;

    @Nullable
    private T data;

    @Nullable
    private Integer errorCode;