Custom Span Underline Text with Dotted line Android -

i tiring underline specific word in text dotted or dashed line , clickable span.

i haven't found solution can me, please.

spannablestringbuilder sb = new spannablestringbuilder(text); list listmot = new arraylist();

       listmot=db.getalldef();         for(int i=0;i<listmot.size();i++)        {               string mot = (listmot.get(i)).get_mot();             final string def = (listmot.get(i)).get_definition();         log.v(null, mot);        pattern p = pattern.compile(mot, pattern.case_insensitive);        matcher m = p.matcher(text);        while (m.find()){            //  typeface tf = typeface.createfromasset(getapplicationcontext().getassets(),"fonts/font.ttf");            //sb.setspan(new customtypefacespan("",tf), m.start(), m.end(), spanned.span_exclusive_exclusive);        sb.setspan(new clickablespan() {          @override         public void onclick(view widget) {         //  toast.maketext(getapplicationcontext(), def,toast.length_long).show();                int[] values = new int[2];              widget.getlocationonscreen(values);             log.d("x & y",values[0]+" "+values[1]);             alertdialog.builder alertdialog = new alertdialog.builder(                     androidsqlitetutorialactivity.this);             alertdialog.setmessage(def);             alertdialog.setcancelable(true);              alertdialog alert11 = alertdialog.create();             alert11.setcanceledontouchoutside(true);              alert11.show();          }     }, m.start(), m.end(), spanned.span_exclusive_exclusive);         }          }           textjson.settext(sb);        textjson.setmovementmethod(linkmovementmethod.getinstance()); 

edit: have updated solution. drawbackground method in solution linebackgroundspan haven't been called no reasons. new version works time , looks clearer.

i met same problem , solved combining solutions:

• this https://stackoverflow.com/a/21097663/5373069 and
• this https://stackoverflow.com/a/6104138/5373069

the result code looks this:

private static class dottedunderlinespan extends replacementspan {     private paint p;     private int mwidth;     private string mspan;      private float mspanlength;     private boolean mlengthiscached = false;      public dottedunderlinespan(int _color, string _spannedtext){         p = new paint();         p.setcolor(_color);         p.setstyle(paint.style.stroke);         p.setpatheffect(new dashpatheffect(new float[]{mdashpatheffect, mdashpatheffect}, 0));         p.setstrokewidth(mstrokewidth);         mspan = _spannedtext;     }      @override     public int getsize(paint paint, charsequence text, int start, int end, paint.fontmetricsint fm) {         mwidth = (int) paint.measuretext(text, start, end);         return mwidth;     }      @override     public void draw(canvas canvas, charsequence text, int start, int end, float x, int top, int y, int bottom, paint paint) {         canvas.drawtext(text, start, end, x, y, paint);         if(!mlengthiscached)             mspanlength = paint.measuretext(mspan);          // https://code.google.com/p/android/issues/detail?id=29944         // canvas.drawline can't draw dashes when hardware acceleration enabled,         // canvas.drawpath can         path path = new path();         path.moveto(x, y + moffsety);         path.lineto(x + mspanlength, y + moffsety);         canvas.drawpath(path, this.p);     } } 

to make underline same on densities set dimens in dp

mstrokewidth = context.getresources().getdimension(r.dimen.stroke_width); mdashpatheffect = context.getresources().getdimension(r.dimen.dash_path_effect); moffsety = context.getresources().getdimension(r.dimen.offset_y); 

and how use it:

  dottedunderlinespan dottedunderlinespan = new dottedunderlinespan(0xff00ff00, spannedtext);   spannablestring.setspan(dottedunderlinespan, startoftext, endoftext, spanned.span_inclusive_inclusive); 

and sure turn off hardware acceleration on textview show underline span. https://stackoverflow.com/a/24467362/5373069

edit: if see ways improve solution appreciate points.