AndroidカスタムView台形レイアウト

public class TextView extends ViewGroup {

    private int size;

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

    public TextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public TextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);


    }

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

        measureChildren(widthMeasureSpec,heightMeasureSpec);

        size = MeasureSpec.getSize(widthMeasureSpec);
    }

    @Override
    protected void onLayout(boolean c, int l, int t, int r, int b) {

        int childCount = getChildCount();

        int startHeight=0;
        int startWidth=0;

        for (int i=0;i