android - WebView 无限扩展 - 如何防止这种情况发生？

Question

我在我的 android 应用程序中使用 webview，但是在它完成加载后 - 我可以通过 onPageFinished(WebView webview, String url) 检测到 - 页面的高度继续无限增长。

我怎样才能防止这种情况发生？

这就是我所做的。

我有一个包含 ScrollView 的通用页面模板。宽度和高度设置为匹配父级。在 ScrollView 内部，我创建的所有活动都有几个通用元素。其中之一是我插入所有用户内容的 LinearLayout。

.....
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerInParent="true"
android:layout_margin="0dp"
android:padding="0dp"
android:scrollbars="none"
>

......

<LinearLayout 
        android:id="@+id/content"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_margin="0dp"
        android:padding="0dp"
        android:orientation="vertical">

        //EVERY USER CONTENT GOES HERE    

</LinearLayout>


......

</ScrollView>

......

在这种特殊情况下，内容是一个网页，它使用移动网络 API 加载 Google 地图。这是布局文件

<?xml version="1.0" encoding="utf-8"?>

  <WebView
       android:id="@+id/maps"
       android:layout_width="fill_parent"
       android:layout_height="wrap_content"
       android:layout_centerInParent="true"
       android:layout_margin="0dp"
       android:padding="0dp"
  />

这是我初始化 webview 的活动代码

.... WebView wv = (WebView)this.content.findViewById(R.id.maps);

WebSettings ws = wv.getSettings();

ws.setPluginState(PluginState.ON);
ws.setSupportZoom(false);
ws.setLightTouchEnabled(true);
ws.setDomStorageEnabled(true);
ws.setAppCacheMaxSize(1024 * 1024 * 8);
ws.setAppCachePath(context.getCacheDir().getAbsolutePath());
ws.setAppCacheEnabled(true);
ws.setAllowFileAccess(true);
ws.setCacheMode(WebSettings.LOAD_NORMAL);
ws.setJavaScriptEnabled(true);

wv.setInitialScale(0);
wv.addJavascriptInterface(new Object(), "Android");
wv.setKeepScreenOn(true);

最后，当我通过 wv.loadUrl("......"); 加载地图时

页面完成加载后，我得到以下日志，并且 webview 在无限循环中增长

02-18 14:16:06.195: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:06.394: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:06.480: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:06.527: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:06.582: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:06.632: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:06.683: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:06.734: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:06.785: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:06.875: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:06.957: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.058: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.332: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.398: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.449: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.496: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.554: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.605: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.652: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.707: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.742: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.792: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.839: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.902: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:07.949: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.015: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.066: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.113: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.164: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.214: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.250: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.300: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.335: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.386: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.437: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.484: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.531: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.566: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.613: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.667: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.714: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.750: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.847: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.902: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:08.949: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.003: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.035: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.085: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.121: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.167: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.218: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.253: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.304: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.367: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.417: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.476: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.523: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.585: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.632: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.664: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.710: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.765: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.812: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.863: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.894: VERBOSE/webview(10904): OnSizeChanged: Enter
02-18 14:16:09.957: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:09.992: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.042: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.097: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.148: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.179: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.226: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.277: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.328: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.378: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.410: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.460: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.511: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.546: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.597: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.648: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.679: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.730: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.781: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.835: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.886: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.925: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:10.976: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.011: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.066: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.125: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.183: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.214: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.265: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.320: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.371: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.402: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.453: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.507: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.558: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.589: VERBOSE/webview(10904): OnSizeChanged: Enter 
02-18 14:16:11.644: VERBOSE/webview(10904): OnSizeChanged: Enter 
.......... This goes on ...........

我注意到当页面包含 jQuery 时会发生这种情况。但是同一页面在股票浏览器中加载良好。

知道为什么会发生这种情况，如何纠正？

感谢任何有意义的帮助......谢谢。

score 6 · Accepted Answer

这是一个迟到的答案，但希望它可以帮助某人。我遇到了同样的问题，罪魁祸首是这个底层的 CSS：

body {
    width: 100%;    
    height: 100%;
}

此更改解决了以下问题：

body {
    width: 100%;    
    height: auto;
}

score 2 · Accepted Answer

这篇博文解决了我的问题。我认为这会有所帮助。 http://capdroid.wordpress.com/2014/08/07/resizing-webview-to-match-the-content-size/

    private void setupWebView() {
    webView.getSettings().setJavaScriptEnabled(true);
    webView.setWebViewClient(new WebViewClient() {
        @Override
        public void onPageFinished(WebView view, String url) {
            webView.loadUrl("javascript:MyApp.resize(document.body.getBoundingClientRect().height)");
            super.onPageFinished(view, url);
        }
    });
    webView.addJavascriptInterface(this, "MyApp");
}

@JavascriptInterface
public void resize(final float height) {
    MyActivity.this.runOnUiThread(new Runnable() {
        @Override
        public void run() {
            webView.setLayoutParams(new LinearLayout.LayoutParams(getResources().getDisplayMetrics().widthPixels, (int) (height * getResources().getDisplayMetrics().density)));
        }
    });
}

score -4 · Accepted Answer

-4

你试过 android:layout_height="50dip"

传递高度属性的值，而不是使用 wrap_content

于 2012-02-18T04:28:40.993 回答

android - WebView 无限扩展 - 如何防止这种情况发生？

3 回答 3

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