Question

我的android缓存系统有问题我想要的是缓存我的最后一个视图为Android并在离线模式下打开它但在网上的情况下希望实时页面不是缓存的如果我们把价格的任何网站作为这样的例子 http://www.oil-price.net/ 这是我的java类代码

public class Petroleum_price extends Fragment {


    public Petroleum_price() {
        // Required empty public constructor
    }

    Context context;
    WebView mwebView;


    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.activity_petroleum_price, container, false);
        context = container.getContext();
        mwebView = new WebView(context);
        mwebView = (WebView) v.findViewById(R.id.webView);
        WebSettings webSettings = mwebView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        mwebView.getSettings().setAppCachePath( getActivity().getApplicationContext().getCacheDir().getAbsolutePath() );
        mwebView.getSettings().setAppCacheEnabled(true);
        mwebView.getSettings().setAllowFileAccess( true );
        webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
        webSettings.setUseWideViewPort(true);
        webSettings.setSaveFormData(true);
        CookieManager.getInstance().setAcceptCookie(true);
        if ( !isNetworkAvailable() ) { // loading offline
            mwebView.getSettings().setCacheMode( WebSettings.LOAD_CACHE_ELSE_NETWORK );
        }

        mwebView.loadUrl( "http://www.oil-price.net/" );
        return v;
    }

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

Answer 1

您可以将此代码用于WebView实施

webView.getSettings().setDomStorageEnabled(true);
webView.getSettings().setAppCacheMaxSize( 10 * 1024 * 1024 );
webView.getSettings().setAppCachePath( getCacheDir().getAbsolutePath() );
webView.getSettings().setAllowFileAccess( true );
webView.getSettings().setAppCacheEnabled( true );
webView.getSettings().setJavaScriptEnabled( true );
webView.getSettings().setCacheMode( WebSettings.LOAD_DEFAULT );
if ( !isNetworkAvailable() ) {
    webView.getSettings().setCacheMode( WebSettings.LOAD_CACHE_ELSE_NETWORK );
}
webView.loadUrl( "http://www.google.com" );

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

并在清单中使用此代码

<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"/>

基于WebView load website when online, load local file when offline

的回答

缓存页面的最后一个视图以用于脱机模式

1 个答案: