parthdesai1208

Single Responsibility principle
-------------------------------
class Invoice(){
    fun AddInvoice(){}
    fun DeleteInvoice(){}
    fun GenerateReport(){}
    fun otherReportRelatedTask(){}
    fun EmailReport(){}
    fun otherEmailRelatedTask(){}
}

parthdesai1208

//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(

parthdesai1208

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)

parthdesai1208

************************************************************************************************************************************
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

parthdesai1208

@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

parthdesai1208

*********************************************************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 {

parthdesai1208

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()

parthdesai1208

//WindowStateUtils.kt
/**
* Information about the posture of the device
*/
sealed interface DevicePosture {
   object NormalPosture : DevicePosture

   data class BookPosture(
       val hingePosition: Rect
   ) : DevicePosture

parthdesai1208

val sharedApplicationContext: Context get() = sharedApplicationContextBackingProperty
    ?: throw IllegalStateException(
        "Application context not initialized yet."
    )
private var sharedApplicationContextBackingProperty: Context? = null

class App : Application() {

    override fun onCreate() {
        super.onCreate()

parthdesai1208

**************************************************************************************************************************************
Sort without sort function 
**************************************************************************************************************************************
    val numbers = mutableListOf(4, 8, 32, 2, 5, 8)
    var temp: Int

    for (i in 0 until numbers.size) {
        for (j in i + 1 until numbers.size) {
            if (numbers[i] > numbers[j]) {
                temp = numbers[i]