車牌號的正規表示式的規則目前是：
"([京津滬渝冀豫雲遼黑湘皖魯新蘇浙贛鄂桂甘晉蒙陝吉閩貴粵青藏川寧瓊使領a-z]"
+"[a-z]"
+"(([0-9][df])|([df]([a-hj-np-z0-9])[0-9])))|"
+"([京津滬渝冀豫雲遼黑湘皖魯新蘇浙贛鄂桂甘晉蒙陝吉閩貴粵青藏川寧瓊使領a-z]"
+"[a-z]"
+"[a-hj-np-z0-9]"
+"[a-hj-np-z0-9掛學警港澳])"
;
這麼寫是可以判斷當前字串是否正確，但是不能限制輸入，也不能判斷車牌號是否輸入完整，所以我對正則規則進行了拆分，達到限制文字輸入的目的和得知車牌號是否輸入完整並且正確。
在呼叫的地方呼叫如下**：
@ontextchanged
(value = r.id.edittext, callback = ontextchanged.callback.text_changed)
void
onvehiclenumtextchanged
(charsequence s,
int start,
int before,
int count)
}
拆分規則，把每個位置的規則進行拆分比較
private
static pattern common1 =
compile
("[京津滬渝冀豫雲遼黑湘皖魯新蘇浙贛鄂桂甘晉蒙陝吉閩貴粵青藏川寧瓊使領a-z]");
private
static pattern common2 =
compile
("[a-z]");
private
static pattern common3_n1_pt =
compile
("[0-9]");
private
static pattern common3_n2_pt =
compile
("[df]");
private
static pattern common3_else =
compile
("[a-hj-np-z]");
private
static pattern common4_n1_pt =
compile
("[0-9]");
private
static pattern common4_n1_pt_else =
compile
("[a-hj-np-z]");
private
static pattern common4_n2_pt =
compile
("[a-hj-np-z0-9]");
private
static pattern pattern4_pt =
compile
("[a-hj-np-z0-9]");
private
static pattern common5_n1_pt =
compile
("[0-9]");
private
static pattern common5_n1_pt_else =
compile
("[a-hj-np-z]");
private
static pattern common5_n2_pt =
compile
("[0-9]");
private
static pattern common5_n2_pt_else =
compile
("[a-hj-np-z]");
private
static pattern pattern5_pt =
compile
("[a-hj-np-z0-9]");
private
static pattern common6_n1_pt =
compile
("[0-9]");
private
static pattern common6_n1_pt_else =
compile
("[a-hj-np-z]");
private
static pattern common6_n2_pt =
compile
("[0-9]");
private
static pattern common6_n2_pt_else =
compile
("[a-hj-np-z]");
private
static pattern pattern6_pt =
compile
("[a-hj-np-z0-9]");
private
static pattern pattern7_n1 =
compile
("[0-9]");
private
static pattern pattern7_n2_pt =
compile
("[0-9]");
private
static pattern pattern7_pt =
compile
("[a-hj-np-z0-9掛學警港澳]");
private
static pattern pattern8_n1 =
compile
("[df]");
private
static pattern pattern8_n2 =
compile
("[0-9]"
);
/**
* 車牌號是否正確（這個正確包括輸入完整）
*/public
static
boolean iscarnumok =
false
;
public
static string checkcarnumregex
(string str)}}
else
if(pattern7_pt.
matcher
(getlocationstr
(str,7)
).matches()
)}}else
if(common6_n1_pt_else.
matcher
(getlocationstr
(str,6)
).matches()
)}}}
}else
if(common5_n1_pt_else.
matcher
(getlocationstr
(str,5)
).matches()
)}}}
}}}else
if(common4_n1_pt_else.
matcher
(getlocationstr
(str,4)
).matches()
)}}}
}}}}
}else
if(common3_n2_pt.
matcher
(getlocationstr
(str,3)
).matches()
)}}else
if(pattern7_pt.
matcher
(getlocationstr
(str,7)
).matches()
)}}else
if(common6_n2_pt_else.
matcher
(getlocationstr
(str,6)
).matches()
)}}}
}else
if(common5_n2_pt_else.
matcher
(getlocationstr
(str,5)
).matches()
)}}}
}}}}
}else}}
}}}}
}}}}
}}}}
return result.
tostring()
;}
private
static string getlocationstr
(string string,
int location)
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