How to clear Webview Cache from Another activity

Question

I have a fullscreen Webview in Activity A and I have a clear button on Activity B to clear the Webview cache. How can I call that Webview clear functionality from another activity?

Tried the below scenario but it crashed because Webview will be null while calling this function from Activity B

   public void clearCacheWeb()
    {

        mWebview.clearCache(true);
        mWebview.clearHistory();
        mWebview.clearFormData();
    }

Is there any hope for this?

have you try startActivityForResult https://stackoverflow.com/questions/37768604/how-to-use-startactivityforresult — Amit pandey, Mar 10 '21 at 07:56

score 0 · Answer 1 · answered Mar 10 '21 at 12:13

0

In ActivityA register a BroadcastReceiver that has an IntentFilter listening for ACTION="clear-cache". In the BroadcastReceiver method onReceive() you can clear the cache in the WebView.

In ActivityB, to clear the cache, send a local broadcast Intent with ACTION="clear-cache".

answered Mar 10 '21 at 12:13

David Wasser

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How can I get that Webview object on the method onReceive() of BroadcastReceiver? – Malhotra Mar 10 '21 at 12:26
The `BroadcastReceiver` can be an inner class of `ActivityA` so you should have access to it directly. – David Wasser Mar 10 '21 at 12:31
Tried this but not triggering the sendBroadcast(new Intent("CLEAR_CACHE")) from button click. – Malhotra Mar 11 '21 at 14:09
please edit your question and post the code that you've added. – David Wasser Mar 11 '21 at 14:49

How to clear Webview Cache from Another activity

1 Answers1