WebView: how to preserve the user's zoom settings across sessions?

Question

My app uses a WebView, and users sometimes adjust the zoom level to make the text larger. However the zoom level setting is lost when the Activity is closed and another one

Answer 1

The answer Jorge gave is spot on, except that SaveZoom ideally should not be called on finish() (which is when the activity is destroyed). A better zoom preference saving approach would be to extend the WebView's WebViewClient, and override onScaleChanged(). So continuing Jorge's onCreate method:

public void onCreate(Bundle savedInstanceState)
{

    ....

    class MyWebViewClient extends WebViewClient
    {
        @Override
        public void onScaleChanged(WebView wv, float oldScale, float newScale)
        {
            SaveZoom();
        }
    }

    mWebView.setWebViewClient(new MyWebViewClient());
}