Android Tutorials - Herong's Tutorial Examples - v3.05, by Herong Yang
saveWebArchive() Method - Saving Web Archive Files
This section provides a tutorial example on how to use the saveWebArchive() method to save Web page content in WebView to Web archive files in the application's files folder.
Now let me make the WebViewClient subclass more useful. In the onPageFinished() callback method, I want to save the Web page as a Web archive file using the saveWebArchive() method. Here is my AndroidWeb version 3.1:
/* AndroidWeb.java * Version 3.1 - Saving content as Web archive file * Copyright (c) 2015, HerongYang.com, All Rights Reserved. */ package com.herongyang.web; import android.app.Activity; import android.os.Bundle; import android.webkit.WebView; import android.webkit.WebViewClient; import android.content.Context; import java.io.*; import java.util.*; public class AndroidWeb extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); WebView view = new WebView(this); AndroidWebClient client = new AndroidWebClient(); view.setWebViewClient(client); view.loadUrl("http://www.google.com/"); setContentView(view); } private class AndroidWebClient extends WebViewClient { @Override public void onPageStarted(WebView view, String url, android.graphics.Bitmap favicon) { logLine(view, "onPageStarted() called: url = "+url); } public void onPageFinished(WebView view, String url) { logLine(view, "onPageFinished() called: url = "+url); // view.saveWebArchive("Google.xml"); // Incorrect use view.saveWebArchive(getFilesDir().getAbsolutePath() + File.separator + System.currentTimeMillis()+".xml"); } public void onLoadResource(WebView view, String url) { logLine(view, "onLoadResource() called: url = "+url); } public void logLine(WebView view, String msg) { try { FileOutputStream fos = view.getContext() .openFileOutput("Activity.log", Context.MODE_APPEND); OutputStreamWriter out = new OutputStreamWriter(fos); out.write((new Date()).toString()+": "+msg+"\n"); out.close(); fos.close(); } catch (Exception e) { e.printStackTrace(System.err); } } } }
Do you see the commented out line of view.saveWebArchive("Google.xml")? This will produce the following error in the main log buffer, because saveWebArchive() is expecting a full path name for the output file:
D/webcoreglue( 1301): saveWebArchive: Failed to initialize xml writer.
Rebuild the debug package, reinstall it to the emulator and run it. Google search home page is displayed again.
Enter "herongyang", search and select my Web site. Some Web archive files should be saved in the application "files" folder now.
C:\herong>\local\android-sdk-windows\platform-tools\adb shell # ls -l /data/data/com.herongyang.web/files ls -l /data/data/com.herongyang.web/files -rw------- u0_a73 u0_a73 95072 20:26 1435501582525.xml -rw------- u0_a73 u0_a73 62359 20:26 1435501590670.xml -rw------- u0_a73 u0_a73 59273 20:26 1435501592254.xml -rw------- u0_a73 u0_a73 14874 20:26 1435501596675.xml -rw-rw---- u0_a73 u0_a73 2658 20:26 Activity.log
AndroidWeb version 3.1 is working! See next tutorial on how to open the Web archive .xml files.
Table of Contents
Installing JDK 1.8 on Windows System
Installation of Android SDK R24 and Emulator
Installing Apache Ant 1.9 on Windows System
Developing First Android Application - HelloAndroid
Android Application Package (APK) Files
Android Debug Bridge (adb) Tool
AboutAndroid - Application to Retrieve System Information
android.app.Activity Class and Activity Lifecycle
View Objects and Layout Resource Files
Using "adb logcat" Command for Debugging
Build Process and Package File Content
►Building Your Own Web Browser
android.webkit.WebView - Web Browser Base Class
AndroidWeb - My Own Web Browser
WebViewClient Subclass - Content Rendering Callbacks
►saveWebArchive() Method - Saving Web Archive Files
Web Archive File - XML File of Base64 Encoded Data
Samsung Galaxy Tab 3 Mini Tablet
USB Debugging Applications on Samsung Tablet
USB Debugging Applications on LG-V905R Tablet