How to display Text for all sizes in same position in android -

i need display alphabet 'a' starting postion should top line postion , end postion should bottom line of screen.. of screen ..i displayed top , bottom lines using view..in sizes of screens top , bottom lines displaying fine...but problem in alphabet displaying 1 screen remain screens not displaying properly...i tried using below code..please 1 suggest me

public class extends activity {   mediaplayer nextsound,mediay2;   myview myview;      relativelayout relativelayout, relativelayout1,relativelayoutmain;      float screenheight, screenwidth, screendensity;       float lefta, topa; public boolean action = false; button start,stop,next,back,home,erase,horn; boolean count = true; relativelayout.layoutparams lp61; sampleview sampleview; int username; string user; bundle b; bitmap bmp1; static bitmap bmp3; int lst; view content; string fname,name; @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);  displaymetrics displaymetrics = new displaymetrics();     getwindowmanager().getdefaultdisplay().getmetrics(displaymetrics);     screenheight = displaymetrics.heightpixels;     screenwidth = displaymetrics.widthpixels;     screendensity = displaymetrics.densitydpi;     setcontentview(r.layout.alh);    relativelayoutmain = (relativelayout) findviewbyid(r.id.relativemain);        relativelayout = (relativelayout) findviewbyid(r.id.relative);       relativelayout.layoutparams layoutrel = (relativelayout.layoutparams)    relativelayout             .getlayoutparams();     layoutrel.topmargin = (int) (5 * (screenheight / 600));     layoutrel.bottommargin = (int) (5 * (screenheight / 600));     layoutrel.leftmargin = (int) (5 * (screenwidth / 1024));     layoutrel.rightmargin= (int) (5 * (screenwidth / 1024));      relativelayout1 = (relativelayout) findviewbyid(r.id.relative2);      relativelayout.layoutparams layoutre2 = (relativelayout.layoutparams) relativelayout1             .getlayoutparams();     layoutre2.topmargin = (int) (5 * (screenheight / 600));     layoutre2.bottommargin = (int) (5 * (screenheight / 600));     layoutre2.leftmargin = (int) (5 * (screenwidth / 1024));     layoutre2.rightmargin= (int) (5 * (screenwidth / 1024));       sampleview = new sampleview(this);      lp61 = new relativelayout.layoutparams(             android.view.viewgroup.layoutparams.wrap_content,             android.view.viewgroup.layoutparams.wrap_content);     sampleview.setlayoutparams(lp61);     lp61.setmargins(0, 0, 0, 0);      int scaledsize = getresources().getdimensionpixelsize(r.dimen.myfontsize);      textview t1=(textview)findviewbyid(r.id.alphabets);       relativelayout.layoutparams layoutt1 = (relativelayout.layoutparams)t1                 .getlayoutparams();        layoutt1.leftmargin = (int) (100 * (screenwidth /1024));     typeface font = typeface.createfromasset(getassets(),             "font/kindtrg.ttf");      t1.settypeface(font);     t1.settextsize(scaledsize);          t1.settext("a");         back=(button)findviewbyid(r.id.back);     relativelayout.layoutparams layoutback = (relativelayout.layoutparams)back                 .getlayoutparams();     layoutback.height = (int) (55 * (screenheight / 600));     layoutback.width = (int) (55 * (screenwidth /1024));       back.setonclicklistener(new onclicklistener() {          public void onclick(view arg0) {             // todo auto-generated method stub               }     });      next=(button)findviewbyid(r.id.next);     relativelayout.layoutparams layoutnext = (relativelayout.layoutparams)next                 .getlayoutparams();     layoutnext.height = (int) (55 * (screenheight / 600));     layoutnext.width = (int) (55 * (screenwidth /1024));       next.setonclicklistener(new onclicklistener() {          public void onclick(view arg0) {             // todo auto-generated method stub               }     });       erase=(button)findviewbyid(r.id.erase);     relativelayout.layoutparams layouterase = (relativelayout.layoutparams)erase                 .getlayoutparams();     layouterase.height = (int) (100 * (screenheight / 600));     layouterase.width = (int) (100 * (screenwidth /1024));     layouterase.topmargin = (int) (40 * (screenheight /600));     layouterase.leftmargin = (int) (300 * (screenwidth /1024));      erase.setonclicklistener(new onclicklistener() {          public void onclick(view arg0) {             // todo auto-generated method stub             try {                  mbitmap.erasecolor(android.graphics.color.transparent);                 canvas canvas = new canvas(mbitmap);                  action = true;                 myview.ondraw(canvas);              } catch (illegalstateexception ie) {                 ie.printstacktrace();             }              }     });       horn=(button)findviewbyid(r.id.horn);     relativelayout.layoutparams layouthorn = (relativelayout.layoutparams)horn                 .getlayoutparams();     layouthorn.height = (int) (75 * (screenheight / 600));     layouthorn.width = (int) (75 * (screenwidth /1024));     layouthorn.topmargin = (int) (40 * (screenheight /600));     layouthorn.leftmargin = (int) (700 * (screenwidth /1024));      horn.setonclicklistener(new onclicklistener() {          public void onclick(view arg0) {             // todo auto-generated method stub                 }     });      home=(button)findviewbyid(r.id.home);     relativelayout.layoutparams layouthome = (relativelayout.layoutparams)home                 .getlayoutparams();      layouthome.height = (int) (60 * (screenheight / 600));      layouthome.width = (int) (60 * (screenwidth /1024));      layouthome.leftmargin = (int) (490 * (screenwidth /1024));      home.setonclicklistener(new onclicklistener() {          public void onclick(view arg0) {             // todo auto-generated method stub             bmp1= content.getdrawingcache();              overlay(bmp1);             getscreen();              }     });       start=(button)findviewbyid(r.id.btn1);     relativelayout.layoutparams layoutstart = (relativelayout.layoutparams)start             .getlayoutparams();     layoutstart.height = (int) (50 * (screenheight / 600));     layoutstart.width = (int) (50 * (screenwidth /1024));     layoutstart.topmargin = (int) (15 * (screenheight / 600));     layoutstart.leftmargin = (int) (460 * (screenwidth /1024));     start.setonclicklistener(new onclicklistener() {          public void onclick(view arg0) {             // todo auto-generated method stub              if (count == true) {                   relativelayoutmain.addview(sampleview, lp61);                     count = false;                 }              }     });    stop=(button)findviewbyid(r.id.btn2);   relativelayout.layoutparams layoutstop = (relativelayout.layoutparams)stop             .getlayoutparams();   layoutstop.height = (int) (50 * (screenheight / 600));   layoutstop.width = (int) (50 * (screenwidth /1024));   layoutstop.topmargin = (int) (15 * (screenheight / 600));   layoutstop.leftmargin = (int) (520 * (screenwidth /1024));   stop.setonclicklistener(new onclicklistener() {          public void onclick(view arg0) {             // todo auto-generated method stub              toast.maketext(a.this,"cccglobal.date.......",toast.length_long).show();              if (count == false) {                   relativelayoutmain.removeview(sampleview);                     count = true;                 }              }     });      myview = new myview(this);     myview.setid(004);     final relativelayout.layoutparams lp6 = new relativelayout.layoutparams(             android.view.viewgroup.layoutparams.wrap_content,             android.view.viewgroup.layoutparams.wrap_content);     myview.setlayoutparams(lp6);     lp6.setmargins(0, 0, 0, 0);     relativelayout1.addview(myview, lp6);     mpaint = new paint();     mpaint.setantialias(true);     mpaint.setdither(true);     mpaint.setcolor(color.black);     mpaint.setstyle(paint.style.stroke);     mpaint.setstrokejoin(paint.join.round);     mpaint.setstrokecap(paint.cap.round);     mpaint.setstrokewidth(6);  }  private paint mpaint;  public void colorchanged(int color) {     mpaint.setcolor(color); }  private bitmap mbitmap;  public class myview extends view {      private canvas mcanvas;     private path mpath;     private paint mbitmappaint;      public myview(context context) {         super(context);         // todo auto-generated constructor stub         mpath = new path();          mbitmappaint = new paint(paint.dither_flag);      }      @override     protected void onsizechanged(int w, int h, int oldw, int oldh) {         super.onsizechanged(w, h, oldw, oldh);          if (mbitmap != null) {             mbitmap.recycle();             mbitmap = null;         }          mbitmap = bitmap.createbitmap(w, h, bitmap.config.argb_8888);          mcanvas = new canvas(mbitmap);      }      @override     protected void ondraw(canvas canvas) {          paint painto = new paint();         painto.setantialias(true);         painto.setstrokewidth(3);         painto.setstyle(paint.style.fill);          paint p1 = new paint();         int scaledsize = getresources().getdimensionpixelsize(r.dimen.myfontsize);         p1.settextsize(scaledsize);         p1.setantialias(true);         typeface font = typeface.createfromasset(getassets(),                 "font/kindtrg.ttf");         p1.settypeface(font);                     int topy111 = (int) (86 * (screenheight / 600));             int topy11 = (int) (375 * (screenheight / 600));             int topy21 = (int) (217 * (screenheight / 600));                int leftx21 = (int) (600 * (screenwidth / 1024));              int leftx11 = (int) (960 * (screenwidth / 1024));         canvas.drawline(leftx11, topy111, leftx21, topy111, painto);         canvas.drawline(leftx11, topy11, leftx21, topy11, painto);             lefta = (int) (70 * (screenwidth / 1024));         topa = (int) (350 * (screenheight / 600));            canvas.drawbitmap(mbitmap, 0, 0, mbitmappaint);         canvas.drawpath(mpath, mpaint);          dashpatheffect dashpath =                 new dashpatheffect(new float[]{30,15}, 1);          paint painto1= new paint();         painto1.setantialias(true);         painto.setstyle(paint.style.fill);         painto1.setpatheffect(dashpath);         painto1.setstrokewidth(3); canvas.drawline(leftx11, topy21 , leftx21, topy21, painto1);          if (action) {             invalidate();         }      }      private float mx, my;     private float touch_tolerance = 2;      private void touch_start(float x, float y) {         mpath.reset();         mpath.moveto(x, y);         mx = x;         = y;     }      private void touch_move(float x, float y) {         float dx = math.abs(x - mx);         float dy = math.abs(y - my);         if (dx >= touch_tolerance || dy >= touch_tolerance) {             mpath.quadto(mx, my, (x + mx) / 2, (y + my) / 2);             mx = x;             = y;         }     }      private void touch_up() {         mpath.lineto(mx, my);         // commit path our offscreen         mcanvas.drawpath(mpath, mpaint);         // kill don't double draw         mpath.reset();     }      @override     public boolean ontouchevent(motionevent event) {         float x = event.getx();         float y = event.gety();          switch (event.getaction()) {         case motionevent.action_down:             touch_start(x, y);             invalidate();             break;         case motionevent.action_move:             touch_move(x, y);             invalidate();             break;         case motionevent.action_up:             touch_up();             invalidate();              break;         }         return true;     } }   class sampleview extends view {     inputstream = null;      private movie mmovie;     private long mmoviestart;      private byte[] streamtobytes(inputstream is) {         bytearrayoutputstream os = new bytearrayoutputstream(1024);         byte[] buffer = new byte[1024];         int len;         try {             while ((len = is.read(buffer)) >= 0) {                 os.write(buffer, 0, len);             }         } catch (java.io.ioexception e) {         }         return os.tobytearray();     }      public sampleview(context context) {         super(context);         setfocusable(true);                    //                 if (is == null) {                     = context.getresources().openrawresource(r.drawable.a);                 }   if (true) {             mmovie = movie.decodestream(is);         } else {             byte[] array = streamtobytes(is);             mmovie = movie.decodebytearray(array, 0, array.length);         }     }      protected void ondraw(canvas canvas) {          long = android.os.systemclock.uptimemillis();         if (mmoviestart == 0) {              mmoviestart = now;         }         if (mmovie != null) {             int dur = mmovie.duration();             if (dur == 0) {                 dur = 1000;             }             int reltime = (int) ((now - mmoviestart) % dur);             mmovie.settime(reltime);               int lef1 = (int) (0 * (screenwidth / 1024));              int top1 = (int) (0 * (screenheight / 600));             mmovie.draw(canvas, lef1, top1);               invalidate();         }     } }     }