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//add in build.gradle (app-level)

tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>() {
    compilerOptions.freeCompilerArgs.addAll(
        "-P",
        "plugin:androidx.compose.compiler.plugins.kotlin:experimentalStrongSkipping=true",
    )
}

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public String getRealPathFromURI(Context context, Uri contentUri) {
  Cursor cursor = null;
  try { 
    String[] proj = { MediaStore.Images.Media.DATA };
    cursor = context.getContentResolver().query(contentUri,  proj, null, null, null);
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    return cursor.getString(column_index);
  } finally {
    if (cursor != null) {

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open class A{
    init {
        println("init A")
    }

    constructor(){
        println("primary constructor of A")
    }

    constructor(x:Int) : this() {

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interface Components{
  void showPrice();
}

class Composite implements Components{
  String name;
  List<Components> componentsList = new ArrayList<>();
  
  public Composite(String name){
    super();

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//one-to-many relation
@Entity(tableName = "TicketGroup")
data class TicketGroup(
    @PrimaryKey(autoGenerate = false)
    val groupId: Int,
    val groupName: String,
)

@Entity(tableName = "Ticket")
data class Ticket(

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class MainActivity : AppCompatActivity(), ConstraintValidatorContext {

    lateinit var edt: EditText
    lateinit var btn: Button

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        edt = findViewById(R.id.edt)

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************************************************************************************************************************************
restore state of list of Int, String using rememberSaveable
************************************************************************************************************************************
import androidx.compose.runtime.Composable
import androidx.compose.runtime.saveable.listSaver
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.snapshots.SnapshotStateList
import androidx.compose.runtime.toMutableStateList

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@Preview(group = "phone", name = "light", device = Devices.PIXEL_4_XL, showSystemUi = true)
@Preview(
    group = "phone",
    name = "dark",
    uiMode = UI_MODE_NIGHT_YES,
    device = Devices.PIXEL_4_XL,
    showSystemUi = true,
    showBackground = true
)
annotation class Phone

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*********************************************************StateFlow Demo**************************************************************
Step-1) build.gradle
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.6"
implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.6"

Step-2) data class
data class Resource<out T>(val status: Status, val data: T?, val message: String?) {

    companion object {

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Gzip interceptors = for data compression
public class GzipRequestInterceptor implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {
        Request originalRequest = chain.request();
        if (originalRequest.body() == null || originalRequest.header("Content-Encoding") != null) {
            return chain.proceed(originalRequest);
        }

        Request compressedRequest = originalRequest.newBuilder()