Android edittext Input Max-value prompt function

 Public classLengthfilterImplementsInputfilter { PublicLengthfilter (intmax) {Mmax=Max; } @Override PublicCharsequence Filter (charsequence source,intStartintend, spanned dest,intDStart,intdend) {           intKeep = Mmax-(Dest.length ()-(DEnd-DStart)); if(Keep <= 0) {               if(Merrortoast = =NULL) {Merrortoast= Toast.maketext (showdetailcommentactivity. This, R.string.comment_input_overflow, Toast.length_short);               } merrortoast.show (); return""; } Else if(Keep >= End-start) {               return NULL;//Keep Original}Else{Keep+=start; if(Merrortoast = =NULL) {Merrortoast= Toast.maketext (showdetailcommentactivity. This, R.string.comment_input_overflow, Toast.length_short);               } merrortoast.show (); if(Character.ishighsurrogate (Source.charat (keep-1))) {                   --Keep; if(Keep = =start) {                       return""; }               }               returnsource.subsequence (start, keep); }       }         Private intMmax; }  

Medittext.setfilters (newnew lengthfilter (Mmaxtextnum)});  

The code is very small but effective, you can try it.

xzy2046, reprint need to indicate. Blog home: http://blog.csdn.net/xzy2046

Android edittext Input Max-value prompt function