android - How get webview scale in Android 4

Question

WebView.getScale() is deprecated (but still usable)

The recommended way to get scale for webview is to use WebViewClient.onScaleChanged() http://developer.android.com/reference/android/webkit/WebViewClient.html#onScaleChanged(android.webkit.WebView, float, float)

I've added corresponding handler in my custom webview:

public class CustomWebView extends WebView {

public CustomWebView(Context context) {
    super(context);
    setWebViewClient(new WebViewClient() {
        @Override
        public void onScaleChanged(WebView view, float oldScale, float newScale) {
            super.onScaleChanged(view, oldScale, newScale);
            currentScale = newScale
        }
    });
}

And now the problem: the method not invoked (at least on my nexus 7) if I'm zoom in/zoom out using pinch, so it works good only if I use zoom controls button.

Answer 1

我正在为 API 级别 17 进行开发，出于同样的原因，我最终使用了已弃用的方法 getScale()。当我在 WebView 中使用捏缩放更改比例时，根本没有触发 WebViewClient.onScaleChanged()。我的扩展 WebView 中有一个自定义 GestureListener，当视图放大（缩放 1.0+）时，它的行为会有所不同。当我在 onScaleChanged() 中设置类变量时，我无法可靠地获得正确的比例值。

Answer 2

尝试 ：

public MyWebView(Context context, AttributeSet attrs) {
    super(context, attrs);
    // TODO Auto-generated constructor stub
    setWebViewClient(new WebViewClient() {
        @Override
        public void onScaleChanged(WebView view, float oldScale, float newScale) {
            super.onScaleChanged(view, oldScale, newScale);
            currentScale = newScale;
        }
    });
}