should start stopped

[oduconge]

if I stop it on the onCreate, the animation always continuous...

[kuba14]

For stopping/starting, just use visibility attribute.

[gcantoni]

Just use this:
com.jetradarmobile.snowfall.SnowfallView snow; snow = findViewById(R.id.snow); snow.setVisibility(View.VISIBLE);

And in your desired layout xml file:
<com.jetradarmobile.snowfall.SnowfallView android:id="@+id/snow" android:layout_width="match_parent" android:layout_height="match_parent" android:visibility="invisible" />

If you want to start/stop it you can use for example SharedPreferences.

if (prefs.getBoolean("snowPref", true)) { com.jetradarmobile.snowfall.SnowfallView snow; snow = findViewById(R.id.snow); snow.setVisibility(View.VISIBLE); }