Android--> easily creates an input box with a Delete button (EditText) with emoji expression filtering

Input box with delete button, this is standard, the implementation of a lot of ways, open source is also a lot of.

But, nothing is like a blind toss.

Speak.

Only on the basis of the original to add the extension. Relatively few intrusions, using the same method as the original. No castration.

Full code:

 Public  class exedittext extends appcompatedittext {Rect Clearrect =NewRect (); Public Exedittext(Context context) {Super(context); } Public Exedittext(context context, AttributeSet attrs) {Super(context, attrs); } Public Exedittext(context context, AttributeSet attrs,intDEFSTYLEATTR) {Super(Context, attrs, defstyleattr); }@Override    protected void Onattachedtowindow() {Super. Onattachedtowindow ();//Add emoji expression filtering without affecting the default filter rules        if("Emoji". Equalsignorecase (String.valueof (Gettag ()))) {FinalInputfilter[] Filters = Getfilters ();Finalinputfilter[] Newfilters =NewInputfilter[filters.length +1]; System.arraycopy (Filters,0, Newfilters,0, filters.length); Newfilters[filters.length] =NewEmojifilter ();        SetFilters (newfilters); }    }@Override    protected void onfocuschanged(BooleanFocusedintdirection, Rect Previouslyfocusedrect) {Super. onfocuschanged (focused, direction, previouslyfocusedrect);///focus change, check if you need to show Delete buttonCheckedit (focused); }@Override    protected void onsizechanged(intWintHintOLDW,intOLDH) {Super. onsizechanged (W, H, OLDW, OLDH);//To calculate the rectangular area where the Delete button is locatedClearrect.set (W-getpaddingright ()-Math.min (W, h), Getpaddingtop (), W-getpaddingright (), Math.min (W, h)-GetPaddingB    Ottom ()); }@Override     Public Boolean ontouchevent(Motionevent event) {//Check Click to delete button area and currently have focus        if(event.getaction () = = Motionevent.action_down && isFocused ()) {//Check if the button rectangle area is being deleted, press the            if(Checkclear (Event.getx (), Event.gety ())) {//If the current is empty, do not handle touch events, otherwise empty the text to achieve the effect of deletion                if(! Textutils.isempty (GetText ())) {SetText ("");return true; }            }        }return Super. Ontouchevent (event); }Private void Checkedit(BooleanFocused) {if(Textutils.isempty (GetText ()) | |!focused) {Setcompounddrawableswithintrinsicbounds (0,0,0,0); }Else{//Here is the key, using the native method to display the delete icon.Setcompounddrawableswithintrinsicbounds (0,0, R.drawable.base_edit_delete,0); }    }//coordinates are in the button area    Private Boolean Checkclear(floatXfloatY) {returnClearrect.contains ((int) x), (int) y); }@Override    protected void ontextchanged(charsequence text,intStartintLengthbefore,intLengthafter) {Super. ontextchanged (text, start, Lengthbefore, Lengthafter);//Time to checkCheckedit (true); }}

Emoji Expression Filter:

May be some special emoji expression, or the character expression can not be filtered, sorry;
If you find, please tell, let us perfect together, thank you!

 Public  class emojifilter implements inputfilter {Pattern Emojipattern = Pattern.compile ("[\ud83c\udc00-\ud83c\udfff]| [\ud83d\udc00-\ud83d\udfff]| [\U2600-\U27FF] ", Pattern.unicode_case | pattern.case_insensitive);Private intMmax =-1;//No filter length by default     Public Emojifilter() {    } Public Emojifilter(intMax) {Mmax = max; }/** * Detects if there is a emoji expression * * @param source * @return  * *     Public Static Boolean Containsemoji(Charsequence Source) {intLen = Source.length (); for(inti =0; i < Len; i++) {CharCodepoint = Source.charat (i);if(!isemojicharacter (codepoint)) {//If it does not match, then the character is a emoji expression                return true; }        }return false; }/** * Determines if emoji * * @param a single character compared to codepoint * @return  */    Private Static Boolean Isemojicharacter(CharCodepoint) {return(Codepoint = =0x0) || (Codepoint = =0x9) || (Codepoint = =0xA) || (Codepoint = =0xD) || ((Codepoint >=0x20) && (codepoint <=0xd7ff)) || ((Codepoint >=0xe000) && (codepoint <=0xFFFD)) || ((Codepoint >=0x10000) && (codepoint <=0x10ffff)); }@Override     PublicCharsequenceFilter(Charsequence source,intStartintEnd, spanned dest,intDStart,intDEnd) {if( This. Emojipattern.matcher (source). Find () | | Containsemoji (source)) {return ""; }if(Mmax! =-1) {intKeep = Mmax-(Dest.length ()-(Dend-dstart));if(Keep <=0) {return ""; }Else if(Keep >= End-start) {return NULL;//Keep original}Else{keep + = start;if(Character.ishighsurrogate (Source.charat (Keep-1)) {--keep;if(keep = = start) {return ""; }                }returnSource.subsequence (start, keep); }        }returnSource }}

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Android--> easily creates an input box with a Delete button (EditText) with emoji expression filtering