Android的 - 加载并执行JavaScript的外部网页 [英] Android - load and execute javascript on external webpage
问题描述
让presume我想添加一个＆LT; DIV＆GT;你好＆LT; / DIV＆GT; 网页的 http://www.google.com 。这可能吗？
Lets presume I want to add a <div>hello</div> a the bottom of the webpage http://www.google.com that I loaded in a WebView. Is it possible?
我能做到这一点对于内部网页（位于设备的内部存储器中的一页）。
I can do it for an internal webpage (a page located on the internal memory of the device).
下面是我的活动的code：
Here is the code of my Activity:
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
public class Main extends Activity {
private WebView mWebview;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mWebview = new WebView(this);
mWebview.getSettings().setJavaScriptEnabled(true);
final Activity activity = this;
mWebview.setWebViewClient(new WebViewClient() {
public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
Toast.makeText(activity, description, Toast.LENGTH_SHORT).show();
}
private final String jsFileURL = "file:///android_asset/script.js";
@Override
public void onPageFinished(WebView view, String url){
final WebView v = view;
view.loadUrl("javascript:{" +
"var script = document.createElement('script');" +
"script.type = 'text/javascript';" +
"script.src = '" + jsFileURL + "';" +
"document.getElementsByTagName('head').item(0).appendChild(script); };");
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
v.loadUrl("javascript:job();");
}
}, 100);
}
});
mWebview.loadUrl("file:///android_asset/page.html");
//mWebview.loadUrl("http://www.google.com");
setContentView(mWebview );
}
}
含量的script.js 位于 /资产文件夹：
function job() {
var div = document.createElement('div');
div.innerHTML = 'hello';
document.getElementsByTagName('body').item(0).appendChild(div);
}
和内容的 page.html即可位于 /资产文件夹也：
And the content of page.html located in the "/assets" folder too:
<html>
<head></head>
<body>
<div>content of my page</div>
</body>
</html>
但
如果我修改
mWebview.loadUrl("file:///android_asset/page.html");
//mWebview.loadUrl("http://www.google.com");
按
//mWebview.loadUrl("file:///android_asset/page.html");
mWebview.loadUrl("http://www.google.com");
招不工作了...有一个安全的理由吗？
the trick doesn't work anymore... Is there a security reason?
推荐答案
在资源创建一个文件夹原始：RES /生。然后主机yourFile.html在文件夹生吃。然后用code：
Create a folder "raw" in the res : res/raw. then host yourFile.html in the folder raw. then with your code :
字符串link = this.getApplicationContext（）getFilesDir（）+原始/ yourFile.html;
String link = this.getApplicationContext().getFilesDir()+ "raw/yourFile.html";
mWebview.loadUrl（链接）;
mWebview.loadUrl(link);
这篇关于Android的 - 加载并执行JavaScript的外部网页的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
