CODEWITHSUNDEEP
androidwebview
sidd
sidd

Reputation: 669

webview not caching

I have been trying to enable caching in Android WebView but every config I saw on SO ends in failure.

Here is what I have:

I have a webpage which has an Iframe inside that loads 10-12 pages in a loop all the content in those pages have Cache-Control: max-age=86400 header.

If I load these pages normally in a browser they work and the pages are cached.

So here is the config that I have

        getSettings().setJavaScriptEnabled(true);
        getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
        getSettings().setDomStorageEnabled(true);
        getSettings().setMediaPlaybackRequiresUserGesture(false);
        getSettings().setAppCacheEnabled(true);
        getSettings().setAppCachePath(context.getCacheDir().getAbsolutePath());
        getSettings().setCacheMode(WebSettings.LOAD_DEFAULT);

These settings work for media playback and enabling js

EDIT

I built a new app and tried loading google with the loadUrl method and reloaded that with a button while the net was off, it was able to reload the page without internet it means it cached that page.

So the issue is that webview is not caching pages which are being loaded by the page.

If anyone knows how we can cache the content which is loaded by webview page loads it would be a great help.

-Thanks

Upvotes: 3

Views: 8811

Answers (2)

sidd
sidd

Reputation: 669

So after a series of detailed tests on our iframe and Android device, I came to realize that WebView does not cache files which are bigger than a particular size.

One of my pages which were being loaded by the iframe had a video of 30mb which was not getting cached and was resulting in huge data consumption. (as it was getting rendered every 2 mins)

I reduced it to 10mb and it still did not cache it finally I reduced it to 980kb and it started caching.

I am not sure about the caching limit per file for WebView but I came across an interesting bug here which states after Android 4.3 the total cache limit was hardcoded to 20mb which we can find in this file on line 98.

If anyone knows where these limits are documented do let the community know by replying here.

Upvotes: 2

SamiAzar
SamiAzar

Reputation: 1320

This code solve my problem, hope help you too: 

webView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);

EDIT: Also you don't needs to these lines:

getSettings().setAppCacheEnabled(true);

 getSettings().setAppCachePath(context.getCacheDir().getAbsolutePath());

Remove them and check one more time. AppCache setting not related to type of cache that you want.

Upvotes: 1

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