java - Custom view not being inflated within FrameLayout -

after implementing framelayout within relativelayout, tried show custom view, it's not working reason. getactivity() in sketcha d1 = new sketcha(getactivity()); becomes underlined in red , returns following error:

sketcha (context, attributeset) in sketcha cannot applied (fragmentactivity)

public class fragmentdrawings extends android.support.v4.app.fragment {      public fragmentdrawings() {}      @override     public view oncreateview(layoutinflater inflater, @nullable viewgroup container, @nullable bundle savedinstancestate) {         return inflater.inflate(r.layout.fragment_drawings, container, false);     }      @override     public void onactivitycreated(@nullable bundle savedinstancestate) {         view v = getview();         assert v != null;          framelayout framelayout = getview().findviewbyid(r.id.sketcha);         layoutparams params = new layoutparams(layoutparams.match_parent, layoutparams.wrap_content);         sketcha d1 = new sketcha(getactivity());         d1.setlayoutparams(params);         framelayout.addview(d1);           super.onactivitycreated(savedinstancestate);     } } 

skectha.java (custom view)

public class skectha extends view {     private final paint mblackpaint = new paint();     private final paint mredpaint = new paint();     private final textpaint mtextpaint;      public static final int boxes_count = 3;      private float onedp;     private float windowheight;      public skectha(context context, attributeset attrs) {         super(context, attrs);         onedp = typedvalue.applydimension(typedvalue.complex_unit_dip, 1,                 getresources().getdisplaymetrics());         windowheight = typedvalue.applydimension(typedvalue.complex_unit_dip, 10,                 getresources().getdisplaymetrics());         float textsize = typedvalue.applydimension(typedvalue.complex_unit_sp, 15,                 getresources().getdisplaymetrics());          mredpaint.setcolor(color.parsecolor("#cc3333"));          mblackpaint.setcolor(color.black);         mblackpaint.setstrokewidth(onedp);         mblackpaint.setstyle(paint.style.stroke);          mtextpaint = new textpaint(textpaint.anti_alias_flag);         mtextpaint.setcolor(color.black);         mtextpaint.settextalign(paint.align.center);         mtextpaint.settextsize(textsize);          mwindowpaint = new paint();         mwindowpaint.setcolor(color.parsecolor("#cc3333"));         mwindowpaint.setstyle(paint.style.stroke);         mwindowpaint.setstrokewidth(onedp);          mwindowfilledpaint = new paint();         mwindowfilledpaint.setcolor(color.parsecolor("#cc3333"));         mwindowfilledpaint.setstyle(paint.style.fill_and_stroke);         mwindowfilledpaint.setstrokewidth(onedp);     }      private paint mwindowpaint;     private paint mwindowfilledpaint;      rectf rect = new rectf();     rectf rect2 = new rectf();      @override     protected void ondraw(canvas canvas) {         super.ondraw(canvas);          if (getwidth() == 0) return;          float msiderectwidth = typedvalue.applydimension(typedvalue.complex_unit_dip, 5,                 getresources().getdisplaymetrics());          setbackgroundcolor(color.parsecolor("#808080"));     }      private void fillrect(canvas canvas, float left, float right, string number) {         rect.set(left + onedp / 2, 0 + onedp / 2, right - onedp / 2, getheight() - onedp / 2);         float xpos = left + ((right - left) / 2);         float ypos = (canvas.getheight() / 2) - ((mtextpaint.descent() + mtextpaint.ascent()) / 2);         canvas.drawtext(number, xpos, ypos, mtextpaint);          rect2.set(left + onedp / 2, 0 + onedp / 2,                 left + (right - left) * 20 / 100 - onedp / 2, windowheight - onedp / 2);     } } 

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