android - Line edittext have space from top -

i want create line edittext , set it's height match parent when display have space top shown in below image.

here code :

public class lineedittext extends edittext { private rect mrect; private paint mpaint; public lineedittext(context context, attributeset attrs) {     super(context, attrs);     mrect = new rect();     mpaint = new paint();     mpaint.setstyle(paint.style.fill_and_stroke);     mpaint.setcolor(color.parsecolor("#afaaaa"));  }  @override protected void ondraw(canvas canvas) {     int height = getheight();     int line_height = getlineheight();      int count = height / line_height;      if (getlinecount() > count)         count = getlinecount();     rect r = mrect;     paint paint = mpaint;     int baseline = getlinebounds(0, r);      (int = 0; < count; i++) {          canvas.drawline(r.left, baseline + 1, r.right, baseline + 1, paint);         baseline += getlineheight();     }      super.ondraw(canvas); } 

edittext.xml

<?xml version="1.0" encoding="utf-8"?>  <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"      android:orientation="vertical" android:layout_width="match_parent"      android:layout_height="match_parent">      <app.lichconggiao.custom.lineedittext          android:id="@+id/edtnote"          android:textsize="20dp"          android:layout_width="fill_parent"          android:layout_height="fill_parent"          android:layout_margintop="10dp"          android:ems="10"          android:textcolor="#212121" />  </linearlayout>

and screen display

how can fix it? please me thank alot