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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.webkit;
     18 
     19 import android.annotation.SystemApi;
     20 import android.os.RemoteException;
     21 
     22 /**
     23  * @hide
     24  */
     25 @SystemApi
     26 public final class WebViewUpdateService {
     27 
     28     private WebViewUpdateService () {}
     29 
     30     /**
     31      * Fetch all packages that could potentially implement WebView.
     32      */
     33     public static WebViewProviderInfo[] getAllWebViewPackages() {
     34         IWebViewUpdateService service = getUpdateService();
     35         if (service == null) {
     36             return new WebViewProviderInfo[0];
     37         }
     38         try {
     39             return service.getAllWebViewPackages();
     40         } catch (RemoteException e) {
     41             throw e.rethrowFromSystemServer();
     42         }
     43     }
     44 
     45     /**
     46      * Fetch all packages that could potentially implement WebView and are currently valid.
     47      */
     48     public static WebViewProviderInfo[] getValidWebViewPackages() {
     49         IWebViewUpdateService service = getUpdateService();
     50         if (service == null) {
     51             return new WebViewProviderInfo[0];
     52         }
     53         try {
     54             return service.getValidWebViewPackages();
     55         } catch (RemoteException e) {
     56             throw e.rethrowFromSystemServer();
     57         }
     58     }
     59 
     60     /**
     61      * Used by DevelopmentSetting to get the name of the WebView provider currently in use.
     62      */
     63     public static String getCurrentWebViewPackageName() {
     64         IWebViewUpdateService service = getUpdateService();
     65         if (service == null) {
     66             return null;
     67         }
     68         try {
     69             return service.getCurrentWebViewPackageName();
     70         } catch (RemoteException e) {
     71             throw e.rethrowFromSystemServer();
     72         }
     73     }
     74 
     75     private static IWebViewUpdateService getUpdateService() {
     76         return WebViewFactory.getUpdateService();
     77     }
     78 }
     79