Ggtcf

I need to cache a WebView in a way that it would use cache if there is no internet, and when there is internet it will use the online page. Since my class with the WebView does loadUrl() in the onCreateView, it reloads it every time so I need cache for 2 reasons: faster loading, but mainly for offline use of the app.

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.net.ConnectivityManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class CalendarFragment extends Fragment 
 private WebView webView;
 @Nullable
 @Override
 public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) 
 View view = inflater.inflate(R.layout.calendar_layout, container, false);
 webView = (WebView) view.findViewById(R.id.calendarWebView);
 webView.getSettings().setAppCacheEnabled(true);
 webView.getSettings().setDomStorageEnabled(true);
 webView.getSettings().setAllowFileAccess(true);
 webView.getSettings().setJavaScriptEnabled(true);
 webView.getSettings().setAppCachePath(getContext().getCacheDir().getPath());
 webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
 webView.setWebViewClient(new WebViewClient());
 webView.loadUrl("https://calendar.google.com/calendar/htmlembed?src=wlmacci%40gmail.com&ctz=America%2FToronto");
 //webView.loadUrl("https://sites.google.com/view/wlmac/textfile?");
 //webView.loadUrl("https://google.ca");
 webView.getSettings().setLoadWithOverviewMode(true);
 webView.getSettings().setUseWideViewPort(true);
 return view;
 

I have tried the LOAD_DEFAULT as well as LOAD_CACHE_ELSE_NETWORK and neither seem to work; when I switch away from Calendar fragment and back to it with my WiFi off, I get net::ERR_ADDRESS_UNREACHABLE

Update: Doesn't work with LOAD_CACHE_ONLY either

Update: Added ACCESS_NETWORK_STATE and ACCESS_WIFI_STATE, am now getting net::ERR_INTERNET_DISCONNECTED error

Sources I learned it from:
Source 1
Source 2

Add these permissions to manifest

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>

Try this code,

webView = (WebView) view.findViewById(R.id.calendarWebView);
webView.getSettings().setAppCacheMaxSize( 8 * 1024 * 1024 ); 
webView.getSettings().setAppCachePath( 
getApplicationContext().getCacheDir().getAbsolutePath() );
webView.getSettings().setAllowFileAccess( true );
webView.getSettings().setAppCacheEnabled( true );
webView.getSettings().setJavaScriptEnabled( true );
webView.getSettings().setCacheMode( WebSettings.LOAD_DEFAULT ); 

if ( !isNetworkAvailable() ) //offline
webView.getSettings().setCacheMode( WebSettings.LOAD_CACHE_ONLY );


webView.loadUrl( "https://calendar.google.com/calendar/htmlembed? 
src=wlmacci%40gmail.com&ctz=America%2FToronto" );

Network connectivity checking method

private boolean isNetworkAvailable() 
ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService( 
CONNECTIVITY_SERVICE );
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();