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获取WebView加载HTML时网页中的内容

2016-10-05 17:55 483 查看

main.xml如下:

[html] view
plaincopy

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity" >



    <WebView

        android:id="@+id/webView"

        android:layout_width="fill_parent"

        android:layout_height="fill_parent"

        android:layout_centerHorizontal="true"

        android:layout_centerVertical="true"

         />



</RelativeLayout>

MainActivity如下:

[java] view
plaincopy

package com.example.testgetwebviewcontent;

import android.app.Activity;

import android.graphics.Bitmap;

import android.os.Bundle;

import android.webkit.WebView;

import android.webkit.WebViewClient;

/**

* Dmeo说明:

* 当WebView加载网页时获取该网页中的内容.

* 参考资料:

* http://www.maxters.net/2012/02/android-webview-get-html-source/

*/

public class MainActivity extends Activity {

   private WebView mWebView;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        init();

    }

    private void init(){

        mWebView=(WebView) findViewById(R.id.webView);

        mWebView.getSettings().setJavaScriptEnabled(true);

        mWebView.addJavascriptInterface(new InJavaScriptLocalObj(), "local_obj");

        mWebView.getSettings().setSupportZoom(true);

        mWebView.getSettings().setDomStorageEnabled(true);

        mWebView.getSettings().setPluginsEnabled(true);

        mWebView.requestFocus();

        mWebView.getSettings().setUseWideViewPort(true);

        mWebView.getSettings().setLoadWithOverviewMode(true);

        mWebView.getSettings().setSupportZoom(true);

        mWebView.getSettings().setBuiltInZoomControls(true);

        mWebView.loadUrl("http://www.baidu.com");

        mWebView.setWebViewClient(new WebViewClient() {

            @Override

            public void onPageStarted(WebView view, String url, Bitmap favicon) {

                super.onPageStarted(view, url, favicon);

            }



            @Override

            public boolean shouldOverrideUrlLoading(WebView view, String url) {

                view.loadUrl(url);

                return true;

            }



            @Override

            public void onPageFinished(WebView view, String url) {

                super.onPageFinished(view, url);

                view.loadUrl("javascript:window.local_obj.showSource('<head>'+"

                        + "document.getElementsByTagName('html')[0].innerHTML+'</head>');");



            }



            @Override

            public void onReceivedError(WebView view, int errorCode,

                    String description, String failingUrl) {

                super.onReceivedError(view, errorCode, description, failingUrl);

            }



        });

    }



    final class InJavaScriptLocalObj {

        public void showSource(String html) {

            System.out.println("====>html="+html);

        }

    }

}

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