如何控制 webView 的缩放 [英] How to control zoom in webView

问题描述

我有这个代码:

[...]
{
    webView = (WebView) findViewById(R.id.webView1);
    webView.setInitialScale(getScale(Double.parseDouble(pubPages)));
    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setSupportZoom(true);
    webView.getSettings().setBuiltInZoomControls(true);
    webView.getSettings().setDefaultZoom(WebSettings.ZoomDensity.FAR);
    webView.getSettings().setLoadWithOverviewMode(true);
    webView.getSettings().setUseWideViewPort(true);
    webView.setPadding(0, 0, 0, 0);

    webView.setWebChromeClient(new WebChromeClient() {
        public void onProgressChanged(WebView view, int progress)
        {
            activity.setTitle("Loading...");
            activity.setProgress(progress * 100);

            if(progress == 100)
                activity.setTitle(R.string.app_name);
        }
    });

    webView.setWebViewClient(new WebViewClient() {
        @Override
        public void onReceivedError(WebView view, int errorCode, String description, String failingUrl)
        {
            // Handle the error
        }

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url)
        {
            view.loadUrl(url);
            return true;
        }
    });

    webView.loadUrl("http://urltoshow");
}

private int getScale(double numPages){
    DisplayMetrics dm = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(dm);
    int screenHeight = dm.heightPixels;

    Double val = (new Double(screenHeight-40)/(new Double(1024)));    
    val = val * 100d;
    return val.intValue();
}

它工作正常，但我想禁止将一侧缩放到低于其自然高度.

And it works fine, but I want to disallow zooming the side below its natural height.

放大是，缩小是，但最多一点.

Zoom in yes, zoom out yes but up to a point.

如何做到这一点?

推荐答案

 webview.getSettings().setBuiltInZoomControls(true);

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