How long do static objects keep their instances on Android?

So, I used a little hack to save the state of the WebView in the Fragment.

private enum WebViewStateHolder
{
    INSTANCE;

    private Bundle bundle;

    public void saveWebViewState(WebView webView)
    {
        bundle = new Bundle();
        webView.saveState(bundle);
    }

    public Bundle getBundle()
    {
        return bundle;
    }
}

      

        
        
        
      

    

Then

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
    Bundle savedInstanceState)
{
    View rootView = inflater.inflate(R.layout.activity_example, container, false);
    ButterKnife.inject(this, rootView);
    ...
    if(WebViewStateHolder.INSTANCE.getBundle() == null)
    {
        webView.loadUrl("file:///android_asset/index2.html");
    }
    else
    {
        webView.restoreState(WebViewStateHolder.INSTANCE.getBundle());
    }
    return rootView;
}

      

        
        
        
      

    

and

@Override
public void onPause()
{
    ...
    WebViewStateHolder.INSTANCE.saveWebViewState(webView);
    super.onPause();
}

      

        
        
        
      

    

So basically I keep the package paused and then when the Fragment creates the view and it's not null, I load it back in. In fact, everything works fine. However, if I say

getActivity().finish();

      

        
        
        
      

    

The WebView loads its data from the package itself, still remembering the history of where it was.

It doesn't seem too reliable, and while this is a test result, I still wondered what happened.

When does a static object lose its data on Android? How long have these specimens been around? Does Android remove them over time?