Caching in Android webview

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Don’t use these:

viewer.getSettings().setAppCacheMaxSize(1024*1024*8);   
viewer.getSettings().setAppCachePath("/data/data/com.your.package.appname/cache"‌​);    
viewer.getSettings().setAppCacheEnabled(true);

These have nothing to do with the default webview internal cache. Appcache is an entirely different feature mean to make you able to run the website w/o an internet connection. It does not work that great and probably you do not want to use it.

With setting this: viewer.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT) is enough.

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