Android WebView getContentHeight()始终返回0

WebView view = new WebView(context);
view.loadData(htmlString,"text/html","utf-8");

view.setWebViewClient(new WebViewClient() {
    public void onPageFinished(WebView view,String url) {
        super.onPageFinished(view,url);
        Log.d("2",view.getContentheight() + "");
        // Set the height of the webview to view.getContentHeight() here?
    }
});

Log.d("1",view.getContentHeight() + "");

这是因为onPageFinished回调意味着WebView已经完成从网络读取字节,就是这样.在onPageFinished被触发时,页面可能甚至还没有被解析. @H_616_4@如果您的webview的高度设置为wrap_contents,那么您可以执行以下操作：

WebView v = new WebView() {
    @Override
    public void onSizeChanged(int w,int h,int ow,int oh) {
        super.onSizeChanged(w,h,ow,oh); // don't forget this or things will break!
        Log.d(tag,"WebView height" + getContentHeight());
    }
};

@H_616_4@如果您的webview不是wrap_contents,那么一个选项是执行josedlujan在his answer中为这个问题提出的建议并从JavaScript中获取高度.

@H_616_4@另一个选择是使用已弃用的PictureListener：

webview.setPictureListener(new PictureListener() {
    int prevIoUsHeight;
    @Override
    public void onNewPicture(WebView w,Picture p) {
        int height = w.getContentHeight();
        if (prevIoUsHeight == height) return;
        prevIoUsHeight = height;
        Log.d(tag,"WebView height" + height); 
    }
});