안드로이드 캐시제거

http://devbible.tistory.com/200

@Override

protected void onStop(){   //백그라운드시

}

@Override

public void onDestroy() {    //어플종료시

super.onDestroy();

clearApplicationCache();

}

private void clearApplicationCache(){

mWebView.clearHistory();

mWebView.clearCache(true);

mWebView.clearView();

//finish();

}