java - Calculate width of Views so that they always fit on screen -

i need dynamically calculate width of bars in diagram drawing.

the minimum width has 4 pixels , maximum 50 pixels.

how calculate width when need more bars dynamically set width , fit on screen?

right hardcoded either 4 or 50 pixels if suggest thankful.

thanks in advance!

edit 1

    public void drawbars(int numberofrates) {     this.removeallviews();     final viewgroup nullparent = null;     this.addview(minflater.inflate(r.layout.layout_bar_diagram, nullparent));     linearlayout parentview = (linearlayout) findviewbyid(r.id.parentview);      int width, height, horizontalmargin, verticalmargin, textbottommargin;      verticalmargin = calculatedpi(16);      if (((numberofrates * calculatedpi(50)) + (numberofrates * calculatedpi(5))) < displaymetrics.widthpixels) {         width = calculatedpi(50);         horizontalmargin = calculatedpi(5);     } else {         width = 0;         horizontalmargin = 0;     }      (int = 0; < numberofrates; i++) {          if (i == 0) {             textbottommargin = 0;             height = calculatedpi(50);         } else if (i == (numberofrates - 1)) {             textbottommargin = calculatedpi(16);             height = calculatedpi(150);         } else {             textbottommargin = calculatedpi(16);             height = calculatedpi(100);         }          textbarview textbarview = new textbarview(getcontext());          textbarview.drawbar(i + 1,                 width,                 height,                 horizontalmargin,                 verticalmargin,                 textbottommargin);          parentview.addview(textbarview);     }      invalidate(); } 

if have many views not idea add them viewgroup. recommend draw widgets on canvas.

public class customdiagram extends view {      private int numberofitems;      public customdiagram(context context) {         super(context);     }      public customdiagram(context context, attributeset attrs) {         super(context, attrs);     }      public customdiagram(context context, attributeset attrs, int defstyleattr) {         super(context, attrs, defstyleattr);     }      @override     protected void ondraw(canvas canvas) {         super.ondraw(canvas);          int width = getmeasuredwidth();          // here have full width of view         // have numberofitems here      } }