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<map>
    <string name="ASx6qQDkW3HGEejBxpA3jWAxQl/FKavIIt50b5QuYQY=">AUcTQT3WS49w2VFXDhjIUHv6QyTfkPAVACxp5GijeGNLOIJOMRCIHIJjpaB3</string>
</map>

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securedSharedPrefs = EncryptedSharedPreferences.create(
    "values_secured",   //xml file name
    master_key,   //master key
    this,   //context
    AES256_SIV,  //key encryption technique
    AES256_GCM  //value encryption technique  
)

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//to save a value
securedSharedPrefs.edit().putString("name", "android").apply()

//to fetch a value
securedSharedPrefs.getString("name", "")

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//save data
encryptedFile.openFileOutput().use { outputstream ->
    outputstream.write(et_data.text.toString().toByteArray())
}
//read data
encryptedFile.openFileInput().use { inputstream ->
    tv_result.text = String(inputstream.readBytes(), Charsets.UTF_8)
}

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override fun onAuthenticationSucceeded(result: AuthenticationResult) {
    super.onAuthenticationSucceeded(result)
    // key is unlocked
}

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<map>
    <string name="email">test@gmail.com</string>
</map>

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encryptedFile = EncryptedFile.Builder(
            secretFile,
            applicationContext,
            MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC), //master key
            EncryptedFile.FileEncryptionScheme.AES256_GCM_HKDF_4KB
        )
            .setKeysetAlias("file_key") //optional
            .setKeysetPrefName("secret_file_shared_prefs")  //optional
            .build()

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val keySpecifications = KeyGenParameterSpec.Builder(
    "key_alias",
    KeyProperties.PURPOSE_ENCRYPT or KeyProperties.PURPOSE_DECRYPT
).apply {
    setKeySize(256)
    setBlockModes(KeyProperties.BLOCK_MODE_GCM)
    setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE)
}.build()

val masterKey = MasterKeys.getOrCreate(keySpecifications)

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Widget getMotionBuilder(MotionElement child, AnimationController animCont,
      {bool isExit = false}) {
    Animation transAnim;

    Widget builder;
    switch (child.mode) {
      case MotionMode.TRANSLATE_FADE:
        transAnim = getTransAnim(child, animCont, isExit);
        builder = FadeTransition(
          opacity: getOpacAnim(child, animCont, isExit),

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@override
  Widget build(BuildContext context) {
    return Scaffold(
        body: Column(
      children: <Widget>[
        Expanded(
          child: Padding(
            padding: const EdgeInsets.symmetric(horizontal: 35, vertical: 50),
            child: Motion<Column>(
              durationMs: 2500,