由网友(花丛中的采蜜峰)分享简介：我创建了一个原生的Andr​​oid应用程序，基本上承载WebView控件。该web视图随后被用来下载一个页面从JavaScript调用window.openDatabase。我可以成功地证实API是否存在通过验证window.openDatabase。I created a native Android app t...

我创建了一个原生的Andr​​oid应用程序，基本上承载WebView控件。该web视图随后被用来下载一个页面从JavaScript调用window.openDatabase。我可以成功地证实API是否存在通过验证window.openDatabase。

I created a native Android app that basically hosts a webView control. That webView is then used to load a page that calls window.openDatabase from JavaScript. I can successfully confirm that the API exists by verifying window.openDatabase.

调用此方法返回一个空当托管WebView控件调用。在调用Android浏览器相同的方法返回数据库的实例。

Calling this method returns a null when called in a hosted webView control. Calling the same method in the Android Browser returns an instance of the database.

有谁知道的WebView控件需要被设置了访问该数据库中的清单中permessions或设置？这甚至可能在本机应用程序。

Does anyone know the permessions in the manifest or settings on the webView control that need to be set to access the database? Is this even possible in a native app.

推荐答案

要使用的数据库API，你要的配置您的WebView ，以接受HTML5数据库调用：

To use the database API you have to configure your WebView to accept HTML5 database calls:

WebSettings settings = webView.getSettings();  
settings.setJavaScriptEnabled(true);  
settings.setJavaScriptCanOpenWindowsAutomatically(true); 
... 
settings.setDatabaseEnabled(true);  
settings.setDatabasePath("/data/data/your.package.name/database_name");

您也可以覆盖你的WebChromeClient的onExceededDatabaseQuota方法，如果你想控制你的存储配额：

You may also override the onExceededDatabaseQuota method of your WebChromeClient if you want to control your storage quota:

public void onExceededDatabaseQuota(String url, String
databaseIdentifier, long currentQuota, long estimatedSize, long
totalUsedQuota, WebStorage.QuotaUpdater quotaUpdater) {
                quotaUpdater.updateQuota(204801);
}