A method in Android programming where Numbers match digit modifications

This article illustrates the method of number matching digit modification in Android programming. To share for your reference, the details are as follows:

The default number matching digit on Android2.1 is 7 bits, that is, from right to left, if 7 bits of two Numbers are matched, then they are considered to be the same number. For example, +86 1234567 and 01234567 are the same number. So to determine whether two Numbers match, simply using "==" is not acceptable.

Android in phone_numbers_equal Sqlite layer added function is used to number matching judgment, this function is the database level, the corresponding SQL statement is PHONE_NUMBERS_EQUAL, android will this function in the form of two and three parameters to register sqlite database, the situation of the two parameters is number A and number B, three parameters are more a bool variables, used to indicate whether or not to use strictly match, the strict match is specially used to Thailand, It seems that Thailand has a special number rule, while in our country, this variable 1 is usually 0.

It is easy to change the number matching digit of android to the desired number in the OldPhoneNumberUtils.cpp file. This number is used in the function phone_number_compare_loose function, which is actually the actual function of number matching, file location: external\sqlite\android

static int MIN_MATCH = 7; 
// Change it to the number you want 

There is also a sample java function implementation at the framwork layer, compareLoosely (A,B), framewoeks\base\telephony\ android\telephony\ PhoneNumberUtils.java, where the MIN_MATCH used also needs to be modified.

[Note] : 2.1 phone_number_compare_loose and compareLoosely function implementation there are a few lines of code, is BUG, will affect the English state 6-bit length of the number matching

I hope this article has been helpful in Android programming.