isaidamier

override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
   super.onAuthenticationSucceeded(result)
   Log.d(TAG, "Authentication was successful")
   showMessage()
}

isaidamier

override fun onClick(view: View) {
   val promptInfo = createPromptInfo()
   if (BiometricManager.from(context)
               .canAuthenticate() == BiometricManager.BIOMETRIC_SUCCESS) {
       biometricPrompt.authenticate(promptInfo)
   } else {
       loginWithPassword()
   }
}

isaidamier

// Callback for the "authenticate" button in your app's UI.
override fun onClick(view: View) {
   val promptInfo = createPromptInfo()
   if (BiometricManager.from(context)
               .canAuthenticate() == BiometricManager.BIOMETRIC_SUCCESS) {
       biometricPrompt.authenticate(promptInfo, cryptoObject)
   } else {
       loginWithPassword()
   }
}

isaidamier

override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {
   super.onAuthenticationError(errorCode, errString)
   Log.d(TAG, "$errorCode :: $errString")
   if(errorCode == BiometricPrompt.ERROR_NEGATIVE_BUTTON) {
       loginWithPassword() // Because negative button says use application password
   }
}

isaidamier

private fun createPromptInfo(): BiometricPrompt.PromptInfo {
   val promptInfo = BiometricPrompt.PromptInfo.Builder()
           .setTitle(getString(R.string.prompt_info_title))
           .setSubtitle(getString(R.string.prompt_info_subtitle))
           .setDescription(getString(R.string.prompt_info_description))
           // Authenticate without requiring the user to press a "confirm"
           // button after satisfying the biometric check
           .setConfirmationRequired(false)
           .setNegativeButtonText(getString(R.string.prompt_info_use_app_password))
           .build()

isaidamier

private lateinit var biometricPrompt: BiometricPrompt

override fun onCreate(savedInstanceState: Bundle?) {
   super.onCreate(savedInstanceState)
   setContentView(R.layout.activity_main)
   setSupportActionBar(findViewById(R.id.toolbar))
   // ...   
   biometricPrompt = createBiometricPrompt()
}

isaidamier

def biometric_version = '1.0.0'
implementation "androidx.biometric:biometric:$biometric_version"

isaidamier

fun queryPurchasesAsync() {
    val purchasesResult = HashSet<Purchase>()
    var result = playStoreBillingClient.queryPurchases(BillingClient.SkuType.INAPP)
    if(nullOrEmpty(result)) {
        queryPurchaseHistoryAsync()
    } else {
        result?.purchasesList?.let { purchasesResult.addAll(it) }
    }
}

isaidamier

override fun onBillingSetupFinished(billingResult: BillingResult) {
    when (billingResult.responseCode) {
        BillingClient.BillingResponseCode.OK -> {
            Log.d(LOG_TAG, "onBillingSetupFinished successfully")
            ...
            queryPurchases()
        }
        ...
    }

isaidamier

private fun instantiateAndConnectToPlayBillingService() {
    playStoreBillingClient = BillingClient.newBuilder(application.applicationContext)
            .enablePendingPurchases() // required or app will crash
            .setListener(this).build()
    connectToPlayBillingService()
}

private fun connectToPlayBillingService(): Boolean {
    Log.d(LOG_TAG, "connectToPlayBillingService")
    if (!playStoreBillingClient.isReady) {