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Last updated 2025-02-10 UTC.
[null,null,["Last updated 2025-02-10 UTC."],[],[],null,["# TextDirectionHeuristicCompat\n\nadded in [version 22.1.0](/topic/libraries/support-library/revisions) \nbelongs to Maven artifact com.android.support:support-compat:28.0.0-alpha1 \n\nTextDirectionHeuristicCompat\n============================\n\n| This package is part of the Android [support library](/topic/libraries/support-library) which is no longer maintained. The support library has been superseded by [AndroidX](/jetpack/androidx) which is part of [Jetpack](/jetpack). We recommend using the AndroidX libraries in all new projects. You should also consider [migrating](/jetpack/androidx/migrate) existing projects to AndroidX. To find the AndroidX class that maps to this deprecated class, see the AndroidX support library [class\n| mappings](/jetpack/androidx/migrate/class-mappings).\n\n\n`\npublic\n\n\ninterface\nTextDirectionHeuristicCompat\n`\n\n\n`\n\n\n`\n\n|------------------------------------------------------|\n| android.support.v4.text.TextDirectionHeuristicCompat |\n\n\u003cbr /\u003e\n\n*** ** * ** ***\n\nInterface for objects that use a heuristic for guessing at the paragraph direction by examining text.\n\nSummary\n-------\n\n| ### Public methods ||\n|---------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| ` abstract boolean` | ` `[isRtl](/reference/android/support/v4/text/TextDirectionHeuristicCompat#isRtl(char[], int, int))`(char[] array, int start, int count) ` Guess if a chars array is in the RTL direction or not. |\n| ` abstract boolean` | ` `[isRtl](/reference/android/support/v4/text/TextDirectionHeuristicCompat#isRtl(java.lang.CharSequence, int, int))`(CharSequence cs, int start, int count) ` Guess if a `CharSequence` is in the RTL direction or not. |\n\nPublic methods\n--------------\n\n### isRtl\n\nadded in [version 22.1.0](/topic/libraries/support-library/revisions) \n\n```\nboolean isRtl (char[] array, \n int start, \n int count)\n```\n\nGuess if a chars array is in the RTL direction or not.\n\n\u003cbr /\u003e\n\n| Parameters ||\n|---------|------------------------------------------------------------------------------------------------------|\n| `array` | `char`: the char array. \u003cbr /\u003e |\n| `start` | `int`: start index, inclusive. \u003cbr /\u003e |\n| `count` | `int`: the length to check, must not be negative and not greater than `array.length - start`. \u003cbr /\u003e |\n\n| Returns ||\n|-----------|-------------------------------------------------------------------------------------------------|\n| `boolean` | true if all chars in the range are to be considered in a RTL direction, false otherwise. \u003cbr /\u003e |\n\n### isRtl\n\nadded in [version 22.1.0](/topic/libraries/support-library/revisions) \n\n```\nboolean isRtl (CharSequence cs, \n int start, \n int count)\n```\n\nGuess if a `CharSequence` is in the RTL direction or not.\n\n\u003cbr /\u003e\n\n| Parameters ||\n|---------|---------------------------------------------------------------------------------------------------------------|\n| `cs` | `CharSequence`: the CharSequence. \u003cbr /\u003e |\n| `start` | `int`: start index, inclusive. \u003cbr /\u003e |\n| `count` | `int`: the length to check, must not be negative and not greater than `CharSequence.length() - start`. \u003cbr /\u003e |\n\n| Returns ||\n|-----------|-------------------------------------------------------------------------------------------------|\n| `boolean` | true if all chars in the range are to be considered in a RTL direction, false otherwise. \u003cbr /\u003e |\n\n-\n\n Interfaces\n ----------\n\n - [TextDirectionHeuristicCompat](/reference/android/support/v4/text/TextDirectionHeuristicCompat)\n-\n\n Classes\n -------\n\n - [BidiFormatter](/reference/android/support/v4/text/BidiFormatter)\n - [BidiFormatter.Builder](/reference/android/support/v4/text/BidiFormatter.Builder)\n - [ICUCompat](/reference/android/support/v4/text/ICUCompat)\n - [TextDirectionHeuristicsCompat](/reference/android/support/v4/text/TextDirectionHeuristicsCompat)\n - [TextUtilsCompat](/reference/android/support/v4/text/TextUtilsCompat)"]]
