# LoginFilter Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) Deprecated in[API level 30](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) # LoginFilter *** ** * ** *** Kotlin\|[Java](https://developer.android.com/reference/android/text/LoginFilter "View this page in Java") ``` abstract class LoginFilter : InputFilter ``` |---|------------------------------------------------------------------------------------------------------| | [kotlin.Any](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/index.html) || | ↳ | [android.text.LoginFilter](https://developer.android.com/reference/kotlin/android/text/LoginFilter#) | |----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | Known Direct Subclasses [LoginFilter.PasswordFilterGMail](https://developer.android.com/reference/kotlin/android/text/LoginFilter.PasswordFilterGMail),[LoginFilter.UsernameFilterGMail](https://developer.android.com/reference/kotlin/android/text/LoginFilter.UsernameFilterGMail),[LoginFilter.UsernameFilterGeneric](https://developer.android.com/reference/kotlin/android/text/LoginFilter.UsernameFilterGeneric) |------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------| | [LoginFilter.PasswordFilterGMail](https://developer.android.com/reference/kotlin/android/text/LoginFilter.PasswordFilterGMail) | This filter is compatible with GMail passwords which restricts characters to the Latin-1 (ISO8859-1) char set. | | [LoginFilter.UsernameFilterGMail](https://developer.android.com/reference/kotlin/android/text/LoginFilter.UsernameFilterGMail) | This filter rejects characters in the user name that are not compatible with GMail account creation. | | [LoginFilter.UsernameFilterGeneric](https://developer.android.com/reference/kotlin/android/text/LoginFilter.UsernameFilterGeneric) | This filter rejects characters in the user name that are not compatible with Google login. | | *** ** * ** *** | **This class was deprecated in API level 30.** | | Password requirements should not be hardcoded in clients. This class also does not handle non-BMP characters. Abstract class for filtering login-related text (user names and passwords) ## Summary | Nested classes || |------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | open | [PasswordFilterGMail](https://developer.android.com/reference/kotlin/android/text/LoginFilter.PasswordFilterGMail) This filter is compatible with GMail passwords which restricts characters to the Latin-1 (ISO8859-1) char set. | | open | [UsernameFilterGMail](https://developer.android.com/reference/kotlin/android/text/LoginFilter.UsernameFilterGMail) This filter rejects characters in the user name that are not compatible with GMail account creation. | | open | [UsernameFilterGeneric](https://developer.android.com/reference/kotlin/android/text/LoginFilter.UsernameFilterGeneric) This filter rejects characters in the user name that are not compatible with Google login. | | Public methods || |----------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | open[CharSequence](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-char-sequence/index.html)! | [filter](https://developer.android.com/reference/kotlin/android/text/LoginFilter#filter(kotlin.CharSequence,%20kotlin.Int,%20kotlin.Int,%20android.text.Spanned,%20kotlin.Int,%20kotlin.Int))`(`source:` `[CharSequence](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-char-sequence/index.html)!`, `start:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `end:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `dest:` `[Spanned](https://developer.android.com/reference/kotlin/android/text/Spanned)!`, `dstart:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`, `dend:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)` This method is called when the buffer is going to replace the range`dstart ... dend`of`dest`with the new text from the range`start ... end`of`source`. | | abstract[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isAllowed](https://developer.android.com/reference/kotlin/android/text/LoginFilter#isAllowed(kotlin.Char))`(`c:` `[Char](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-char/index.html)`)` Returns whether or not we allow character c. | | open[Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [onInvalidCharacter](https://developer.android.com/reference/kotlin/android/text/LoginFilter#onInvalidCharacter(kotlin.Char))`(`c:` `[Char](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-char/index.html)`)` Called whenever we encounter an invalid character. | | open[Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [onStart](https://developer.android.com/reference/kotlin/android/text/LoginFilter#onStart())`()` Called when we start processing filter. | | open[Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [onStop](https://developer.android.com/reference/kotlin/android/text/LoginFilter#onStop())`()` Called when we're done processing filter | ## Public methods ### filter Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` open fun filter(     source: CharSequence!,     start: Int,     end: Int,     dest: Spanned!,     dstart: Int,     dend: Int ): CharSequence! ``` **Deprecated:** *Deprecated in Java.* This method is called when the buffer is going to replace the range`dstart ... dend`of`dest`with the new text from the range`start ... end`of`source`. Returns the CharSequence that we want placed there instead, including an empty string if appropriate, or`null`to accept the original replacement. Be careful to not to reject 0-length replacements, as this is what happens when you delete text. ### isAllowed Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` abstract fun isAllowed(c: Char): Boolean ``` **Deprecated:** *Deprecated in Java.* Returns whether or not we allow character c. Subclasses must override this method. ### onInvalidCharacter Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` open fun onInvalidCharacter(c: Char): Unit ``` **Deprecated:** *Deprecated in Java.* Called whenever we encounter an invalid character. | Parameters || |-----|----------------------------------------------------------------------------------------------------| | `c` | [Char](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-char/index.html):the invalid character | ### onStart Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` open fun onStart(): Unit ``` **Deprecated:** *Deprecated in Java.* Called when we start processing filter. ### onStop Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels) ``` open fun onStop(): Unit ``` **Deprecated:** *Deprecated in Java.* Called when we're done processing filter