"Android" Android input box EditText prohibit input emoji emoji

Reprint Address: http://blog.csdn.net/elsdnwn/article/details/45390771

Package com.liujy.ui.wiget;import android.content.context;import android.text.editable;import  android.text.selection;import android.text.spannable;import android.text.textwatcher;import  android.util.AttributeSet;import android.widget.EditText;public class  containsemojiedittext extends edittext {    //the cursor position before entering the emoticon      private int cursorpos;    //input EditText text in front of emoticons      private string inputaftertext;    //Reset the contents of EditText      private boolean resettext;    private context mcontext;     public containsemojiedittext (Context context)  {         super (context);        this.mcontext = context;         Initedittext ();     }    public containsemojiedittext (Context  context, attributeset attrs)  {        super ( Context, attrs);        this.mcontext = context;         initedittext ();    }     Public containsemojiedittext (context context, attributeset attrs, int  defstyleattr)  {        super (context, attrs,  DEFSTYLEATTR);        this.mcontext = context;         initedittext ();    }    //  Initialize the edittext  control     private void initedittext ()  {         addtextchangedlistener (nEw textwatcher ()  {             @Override             public void  Beforetextchanged (Charsequence s, int start, int before, int count)  {                 if  (! Resettext)  {                     cursorpos = getselectionend ();                     //  here with s.tostring () And not directly with s because if you use s,                     //  So, Inputaftertext and s are pointing to the same address in memory, S has changed,              &nbsP;      // inputaftertext also changed, then the expression filter failed                      inputaftertext=  s.tostring ();                 }            }              @Override              public void ontextchanged (charsequence s, int start, int  Before, int count)  {                 if  (!resettext)  {                     if  (count >= 2)  {// Emoji have a minimum character length of 2                         charsequence input = s.subsequence (Cursorpos, cursorpos + count);                          if  (Containsemoji (input.tostring))  {                              resetText = true;                              toast.maketext (mcontext,  "does not support input emoji emoji",  toast.length_short). Show ();                              //is the emoji to revert text to the input emoji before the content                               SetText (Inputaftertext);                             charsequence text  = gettext ();                             if  (text  instanceof spannable)  {                                  Spannable spanText =  (spannable)  text;                                  selection.setselection (Spantext, text.length ());                              }                         }                     }                 } else {                     resetText = false;                 }              }            @ override            public void  Aftertextchanged (editable editable)  {             }        });    }     /**     *  detect if there is emoji expression      *      *  @param  source     *  @return       */    public static boolean containsemoji (String source)  {         int len = source.length ();         for  (int i = 0; i < len; i++)  {             char codepoint = source.charat (i);             if  (!isemojicharacter (codepoint))  { //If it doesn't match, Then the character is emoji emoticons                  return true;            }         }        return false;     }    /**     *  determine if it is emoji      *     *  @param  codePoint  Comparison of single characters       *  @return      */    private static boolean  isemojicharacter (Char codepoint)  {        return  (codepoint == 0x0)   | |  (codepoint == 0x9)  | |   (codepoint == 0xa)  | |                  (codepoint &NBSP;==&NBSP;0XD)  | |   ((codepoint >= 0x20)  &&  (codepoint <= 0xd7ff))  | |                  (codepoint  >= 0xe000)  &&  (CODEPOINT&NBSP;&LT;=&NBSP;0XFFFD))  | |   ((codepoint >= 0x10000)                  &&  (CODEPOINT&NBSP;&LT;=&NBSP;0X10FFFF));     }}

"Android" Android input box EditText prohibit input emoji emoji