Wave not show wave effect on first time when attached in Fragment

[ThanawatMas]

When Fragment was created I injected some logic to overall view that not include waveview,
I wonder why wave is not working, but when I drag notification bar down and push it up and look up WaveView in app. The wave was worked right.

What was something that I had wrong.

PS. I try to use
waveView.invalidate();
waveView.postInvalidate();
waveView.postInvalidate(5000);
It seems not working.

[HarlonWang]

I sovled it by this code .

In Wave.java , add this code .

java
@OverRide
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
if (mWaveLength==0){
startWave();
}
}

[knightbenax]

Worked for me