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当用户单击 webview 上的输入字段时，我试图让 webview 从停止放大时遇到问题。如何防止 webview 停止放大？

这是我的代码：

 wv = (WebView) findViewById(R.id.webView1); 
    WebSettings webSettings = wv.getSettings();
    wv.setWebViewClient(new WebViewClient());   
    wv.getSettings().setLoadWithOverviewMode(true);
    wv.getSettings().setUseWideViewPort(true);
    wv.getSettings().setDisplayZoomControls(false);
    wv.getSettings().setBuiltInZoomControls(false);
    wv.getSettings().setSupportZoom (true);
    wv.getSettings().setJavaScriptEnabled(true);
    wv.getSettings().setDefaultZoom(ZoomDensity.FAR);

    String form = "<form action='demo_form.asp'><input type='text' name='email' style='font-size: 200%;width:78%;float:left'><input type='submit' value='Submit' style='float:right;width:20%;font-size: 200%'></form>";
    String summary = "<html><body>"+form+"</body></html>";


    wv.loadData(summary, "text/html", null);
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