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Added in API level 24

public abstract class UnicodeFilter
extends Object implements UnicodeMatcher

java.lang.Object
	android.icu.text.UnicodeFilter

Known Direct Subclasses

UnicodeSet

UnicodeFilter定义了用于选择Unicode字符的全范围（U + 0000到U + FFFF）的子集的协议。

From interface android.icu.text.UnicodeMatcher

公共方法(Public methods)
`abstract boolean`	`contains(int c)` 为选定子集中的字符返回 `true` 。
`int`	`matches(Replaceable text, int[] offset, int limit, boolean incremental)` Unicode过滤器的UnicodeMatcher :: matches（）的默认实现。

From class java.lang.Object

From interface android.icu.text.UnicodeMatcher

Added in API level 24

boolean contains (int c)

为选定子集中的字符返回true 。换句话说，如果要过滤一个字符，那么contains()返回false 。

参数(Parameters)
`c`	`int`

返回(Returns)
`boolean`

Added in API level 24

int matches (Replaceable text, 
                int[] offset, 
                int limit, 
                boolean incremental)

Unicode过滤器的UnicodeMatcher :: matches（）的默认实现。匹配偏移量处的单个16位代码单元。

参数(Parameters)
`text`	`Replaceable`: the text to be matched
`offset`	`int`: on input, the index into text at which to begin matching. On output, the limit of the matched text. The number of matched characters is the output value of offset minus the input value. Offset should always point to the HIGH SURROGATE (leading code unit) of a pair of surrogates, both on entry and upon return.
`limit`	`int`: the limit index of text to be matched. Greater than offset for a forward direction match, less than offset for a backward direction match. The last character to be considered for matching will be text.charAt(limit-1) in the forward direction or text.charAt(limit+1) in the backward direction.
`incremental`	`boolean`: if TRUE, then assume further characters may be inserted at limit and check for partial matching. Otherwise assume the text as given is complete.

返回(Returns)
`int`	a match degree value indicating a full match, a partial match, or a mismatch. If incremental is FALSE then U_PARTIAL_MATCH should never be returned.