my Custom View gets drawn only when added in onCreate

Question

I made a \"GraphBar\" custom view that is a RelativeLayout with a TextView on the bottom and an ImageView, varying in height, above th

Answer 1

I've finally found a way to call again requestLayout(). I called setWillNotDraw(false) in the constructor so that in onDraw() (that is after onLayout()) I can call the extra requestLayout(). This generates a stupid cycle but solves the problem aesthetically.

If anyone knows a better solution, let me know... here the new code (modifies are next to comments):

//...
    public GraphBar(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        LayoutInflater.from(context).inflate(R.layout.graphbar, this, true);
        setWillNotDraw(false); // WORKAROUND: onDraw will be used to make the
                                // redundant requestLayout() call
        setId(R.id.graphBar);
    }
//...
    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        // i think it's one of the worst workaround one could think of.
        // luckily android is smart enough to stop the cycle...
        findViewById(R.id.smallBar).requestLayout();
    }

    public void setBarHeight(float value, float max) {
        mBarHeight = value / max;
        View bar =   findViewById(R.id.smallBar);

        bar.requestLayout(); // because when we create this view onDraw is called...
        bar.invalidate();    // ...but not when we modify it!!!
                            //so we need to invalidate too
    }
//...