WebView 改变内容的时候自适应高度解决办法

在js中获取内容的高度， 然后调用android里面的方法，设置webview的高度。

注意：黄色区域要修改成自己的元素

要运行在UI线程

要设置LayoutParams

webView.getLayoutParams().height =height;是没有用的

为了效率，可以把已经获取到的高度保存下来，备用，获取到高度的内容就不用重复获取

private void setupWebView(final WebView webView) {

webView.getSettings().setJavaScriptEnabled(true);

webView.setWebViewClient(new WebViewClient() {

@Override

public void onPageFinished(WebView view, String url) {

System.out.println("finish");

webView.loadUrl("javascript:ViewHolder.resize(document.getElementById('test').scrollHeight)");

super.onPageFinished(view, url);

}

});

webView.addJavascriptInterface(this, "ViewHolder");

}

@android.webkit.JavascriptInterface

public void resize(final float height) {

activity.runOnUiThread(new Runnable() {

@Override

public void run() {

webView.setLayoutParams(new LinearLayout.LayoutParams(

getResources().getDisplayMetrics().widthPixels,

(int) ((height + 10) * getResources()

.getDisplayMetrics().density)));

System.out.println("height " + height);

}

});

}

ListView 中复用webview 具体viewholder举例子

class ViewHolder {

WebView webView;

int position;

public ViewHolder(View convertView) {

this.webView = (WebView) convertView.findViewById(R.id.webview);

setupWebView(this.webView);

}

private void loadingWeb(String content,int position) {

this.position = position;

webView.loadDataWithBaseURL(null, content, "text/html",

"utf-8", null);

if (heightMap.get(position) != null) {

System.out.println("resize $$$$$$$$$$$");

resize(heightMap.get(position));

}

}

private void setupWebView(final WebView webView) {

WebSettings settings = webView.getSettings();

settings.setJavaScriptEnabled(true);

settings.setBlockNetworkImage(false);

webView.setWebViewClient(new WebViewClient() {

@Override

public void onPageFinished(WebView view, String url) {

System.out.println("finish " + heightMap.get(position));

if (heightMap.get(position) == null) {

webView.loadUrl("javascript:ViewHolder.resize(document.getElementById('test').scrollHeight)");

} 

super.onPageFinished(view, url);

}

});

webView.addJavascriptInterface(this, "ViewHolder");

}

@android.webkit.JavascriptInterface

public void resize(final float height) {

heightMap.put(position, height);

activity.runOnUiThread(new Runnable() {

@Override

public void run() {

webView.setLayoutParams(new LinearLayout.LayoutParams(

getResources().getDisplayMetrics().widthPixels,

(int) ((height + 10) * getResources()

.getDisplayMetrics().density)));

System.out.println("height " + height);

}

});

}

}