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fun String.formatIBAN(): String {
    val iban = replace("\\s+".toRegex(), "").uppercase(Locale.getDefault())
    val maxLength = (iban.length * 1.25).roundToInt()
    val result = StringBuilder(maxLength)
    iban.forEachIndexed { index, c ->
        when {
            index > 0 && index % 4 == 0 -> result.append(" $c")
            else -> result.append(c)
        }
    }

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package com.example.test

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.text.Editable
import android.text.TextWatcher
import com.example.test.databinding.ActivityMainBinding

class MainActivity : AppCompatActivity() {

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package com.example.livedatatest

import android.content.Intent
import android.os.Bundle
import android.util.Log
import android.widget.Button
import android.widget.EditText
import androidx.appcompat.app.AppCompatActivity
import androidx.core.widget.addTextChangedListener
import androidx.lifecycle.lifecycleScope

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fun isTextMoreThan(editText: EditText, charNumber: Int): Boolean {
        return if (editText.text.toString().length >= charNumber) {
            editText.background =
                ContextCompat.getDrawable(requireContext(), R.drawable.shape_edit_text)
            editText.background.alpha = 180
            true
        } else {
            editText.background = ContextCompat.getDrawable(
                requireContext(),

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// activity with android:windowSoftInputMode="stateHidden"

private fun showPasswordDialog() {
        val context = this.context ?: return
        val editText = EditText(context)
        editText.inputType = InputType.TYPE_CLASS_NUMBER or InputType.TYPE_NUMBER_VARIATION_PASSWORD
        editText.filters = arrayOf(InputFilter.LengthFilter(4))

        val frame = FrameLayout(context)
        frame.addView(editText)

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import android.text.Editable
import android.text.TextWatcher
import android.view.View
import android.widget.EditText

/**
 * Created by Konstantin Tskhovrebov (aka @terrakok) on 18.09.17.
 */
class SmartField<T: Any>(
        private val editText: EditText,

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package com.toastme.widget

import android.text.Editable
import android.text.TextWatcher
import android.widget.EditText
import java.math.BigDecimal
import java.text.DecimalFormat

class NumberTextWatcher(private val editText: EditText) : TextWatcher {

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📜 Info:

• Android Studio Flamingo | 2022.2.1
• Build #AI-222.4459.24.2221.9862592, built on March 31, 2023
• Gradle JDK: jbr-17 (JetBrains Runtime version 17.0.6)
• Windows 11 (version 10.0.22000.1817)

🐛 Bug/Error log:

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interface CircularTimerListener {
    fun updateDataOnTick(remainingTimeInMs: Long): String?
    fun onTimerFinished()
}

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data class DownloadItem(
    val bytesDownloadedSoFar: Long = -1,
    val totalSizeBytes: Long = -1,
    val status: Int,
    val uri: String
)

class DownloadProgressLiveData(private val activity: Activity) :
    LiveData<List<DownloadItem>>(),
    CoroutineScope {