如何获取Android WebView中的完整高度? [英] How to get the full height of in android WebView?

问题描述

我有一个 RelativeLayout 和 WebView .我正在将一些生成的html文本加载到该 WebView 中.加载数据后 WebView 高度超过屏幕.现在，我需要整个 WebView 的高度.直到现在，我尝试了 WebView#getHeight()， WebView#getBottom()，但是我得到了可见内容的高度.

I have a RelativeLayout with WebView. I am loading some generated html text into that WebView. After loading the data WebView height exceeding the screen. Now I need the height of the entire WebView. Till now I tried WebView#getHeight(), WebView#getBottom() but I'm getting the height of visible content.

如何获取 WebView 的总高度?

推荐答案

最后，我得到了我的问题的答案.这是答案.

Finally I got the answer for my question. Here is the answer.

加载 WebView 后，我们将在 WebViewClient#onPageFinished 中获得调用，我们需要调用javascript以获取 WebView 的全部内容的高度.

After loading WebView we will get call in WebViewClient#onPageFinished there we need to call javascript to get the height of full content of WebView

WebViewClient 类

/**
 * Custom web client to perform operations on WebView
 */
class WebClient extends WebViewClient {

    @Override
    public void onPageFinished(WebView view, String url) {
            view.loadUrl("javascript:AndroidFunction.resize(document.body.scrollHeight)");
        }
    }
}

此后，我们将在 WebInterface 类中获取高度为高度的回调，该类已注册为 JavascriptInterface

After that we will get callback with height in WebInterface class which is Registered as JavascriptInterface

/**
 * WebView interface to communicate with Javascript
 */
public class WebAppInterface {

    @JavascriptInterface
    public void resize(final float height) {
        float webViewHeight = (height * getResources().getDisplayMetrics().density);
        //webViewHeight is the actual height of the WebView in pixels as per device screen density
    }
}

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