View Group question

ChartElementView

public class ChartElementView extends ViewGroup {



    private final String myTag = "ChartElementView";
    private RectF mHorizontalBarBounds = new RectF();
    private HorizontalBar mChartBar;

    private Parking mParkingData;


    private Paint mHorizontalBarPaint;
    private int mHorizontalBarColor;


    public ChartElementView(Context context) {
        super(context);

        init();
    }

    public ChartElementView(Context context,AttributeSet attrs){
        super(context,attrs);

        TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.ChartElementView,0,0);

        try{

            mHorizontalBarColor = a.getColor(R.styleable.ChartElementView_barColor,0xff000000);
        }

        finally {
            a.recycle();
        }

        init();
    }

    private void init(){

        mHorizontalBarPaint = new Paint();
        mHorizontalBarPaint.setStyle(Paint.Style.STROKE);
        mHorizontalBarPaint.setColor(0xFF33B5E5);
        mHorizontalBarPaint.setStrokeWidth(4);

        mChartBar = new HorizontalBar(getContext());

        addView(mChartBar);


    }

    @Override
    protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec){

       final int desiredWidth = 100;
       final int desiredHeight = 25;

       final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
       final int widthMode = MeasureSpec.getMode(widthMeasureSpec);

      final int heightSize = MeasureSpec.getSize(heightMeasureSpec);
      final int heightMode = MeasureSpec.getMode(heightMeasureSpec);

        int width;
        int height;
        //Measure Width
         if(widthMode == MeasureSpec.EXACTLY)
         {
             width = widthSize;
         }
        else if(widthMode == MeasureSpec.AT_MOST){

             width = Math.min(desiredWidth,widthSize);
         }
        else{
             width = desiredWidth;
         }

        //Measure Width
        if(heightMode == MeasureSpec.EXACTLY)
        {
            height = heightSize;
        }
        else if(heightMode == MeasureSpec.AT_MOST){

            height = Math.min(desiredHeight,heightSize);
        }
        else{
            height = desiredHeight;
        }

        setMeasuredDimension(width,height);

        getChildAt(0).measure(
                MeasureSpec.makeMeasureSpec(width / 2,
                        MeasureSpec.EXACTLY),
                MeasureSpec.makeMeasureSpec(height / 2,
                        MeasureSpec.EXACTLY));


    }


    @Override
    protected void onLayout(boolean b, int i, int i2, int i3, int i4) {
        getChildAt(0).layout(0, 0, getMeasuredWidth() / 2,
                getMeasuredHeight() / 2);
        // the second child

    }



    @Override
    protected void onDraw(Canvas canvas){
        super.onDraw(canvas);

        Log.d(myTag,"onDraw ChartElementView");

        canvas.drawText("Teste",10,10,mHorizontalBarPaint);

    }

    private class HorizontalBar extends View {

        public HorizontalBar(Context context) {
            super(context);
        }

        @Override
        protected void onDraw(Canvas canvas){
            super.onDraw(canvas);

            Log.d(myTag,"onDraw ChartElementView");

            Paint paint = new Paint();
            paint.setStyle(Paint.Style.STROKE);
            paint.setColor(0xFF33B5E5);
            paint.setStrokeWidth(4);
            paint.setTextSize(20);

            canvas.drawText("Private class",50,50, paint);




        }
    }

    public void setParkingData(Parking mParkingData) {
        this.mParkingData = mParkingData;
        invalidate();
    }


}