Read elements in HTML loaded form webview Android
I need to read elements from an HTML file. I loaded them from webview but I haven't found the best way to read.
Code: content_html
package com.android.webview;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.webkit.WebView;
import android.webkit.WebViewClient;
public class ViewLink extends 开发者_运维百科Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final WebView browser = (WebView)findViewById(R.id.browser);
/* JavaScript must be enabled if you want it to work, obviously */
browser.getSettings().setJavaScriptEnabled(true);
/* Register a new JavaScript interface called HTMLOUT */
browser.addJavascriptInterface(new MyJavaScriptInterface(), "HTMLOUT");
/* WebViewClient must be set BEFORE calling loadUrl! */
browser.setWebViewClient(new WebViewClient() {
@Override
public void onPageFinished(WebView view, String url)
{
/* This call inject JavaScript into the page which just finished loading. */
browser.loadUrl("javascript:window.HTMLOUT.showHTML('<head>'+document.getElementsByTagName('html')[0].innerHTML+'</head>');");
/*
read elements in content_html
*/
}
});
browser.loadUrl("http://vnexpress.net/gl/rss/");
}
final Context myApp = this;
Builder builder;
String content_html;
/* An instance of this class will be registered as a JavaScript interface */
class MyJavaScriptInterface
{
@SuppressWarnings("unused")
public void showHTML(String html)
{
builder = new AlertDialog.Builder(myApp);
builder.setTitle("HTML")
.setMessage(html)
.setPositiveButton(android.R.string.ok, null)
.setCancelable(false)
.create()
.show();
content_html = html;
Log.i("html", html+" ");
}
}
Try this one that work for me
class MyJavaScriptInterface
{
@SuppressWarnings("unused")
public void showHTML(String html)
{
System.out.println("Html...."+html);
}
}
In Activity
browser.getSettings().setJavaScriptEnabled(true);
browser.getSettings().setPluginsEnabled(true);
browser.getSettings().setSupportZoom(true);
browser.getSettings().setBuiltInZoomControls(true);
browser.setBackgroundColor(Color.TRANSPARENT);
browser.addJavascriptInterface(new MyJavaScriptInterface(), "HTMLOUT");
browser.setWebViewClient(new WebViewClient() {
@Override
public void onPageFinished(WebView view, String url)
{
browser.loadUrl("javascript:window.HTMLOUT.showHTML('<head>'+document.getElementsByTagName('html')[0].innerHTML+'</head>');");
}
});
browser.loadUrl(link);
加载中,请稍侯......
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