在Android的WebView使用本地存储 [英] Using local storage on Android webview

问题描述

我与Android code的实验：我想用存储HTML 5本地存储的一个值。在这个练习中我使用这一个简单的页面：
的http://www.w3schools.com/html5/tryit.asp?filename=tryhtml5_webstorage_local_clickcount

I am experimenting with Android code: I would like to store one value using HTML 5 local storage. For this exercise I' using a page as simple as this one: http://www.w3schools.com/html5/tryit.asp?filename=tryhtml5_webstorage_local_clickcount

我的表现确实让我打了互联网，这是7分钟-SDK。

My manifest does allow me to hit the internet, and it is min-sdk of 7.

下面是我的Java code：

Here is my java code:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    webview = (WebView) findViewById(R.id.webview);
    WebView webView = (WebView) findViewById(R.id.webview);
    webView.addJavascriptInterface(new JavaScriptInterface(this), "Android");
    WebSettings webSettings = webview.getSettings();
    webSettings.setJavaScriptEnabled(true);
    webSettings.setDatabasePath("");
    webSettings.setDomStorageEnabled(true);
    webview.setWebChromeClient(new WebChromeClient());
    webview.loadUrl("http://www.xyz.com/test.html");
    ///xyz.com/test.html is a sample  :)
    webview.setWebViewClient(new HelloWebViewClient());
}

我的问题是，当我关闭该应用程序，本地存储的值不再存在。我可以用默认的浏览器浏览到同一页面，甚至关闭模拟器，这正是我要寻找的行为后的值是永久性的。

My problem is that when I close the app, the locally stored value is no longer there. I can browse to the same page using the default browser, and the value is persistent even after closing the emulator, which is exactly the behavior that I am looking for.

这可能是非常简单的一个东西....任何想法？

This is probably a something extremely simple....any ideas?

推荐答案

这似乎空字符串DatabasePath就是问题所在。我试过类似code和一个空字符串的路径，该值不应用程序退出后仍然存在。如果我定义一个特定的数据库路径，则该值仍然存在预期。

It appears the empty string DatabasePath is the problem. I tried similar code and with an empty string path, the value does not persist after the app exits. If I define a specific database path, the value persists as expected.

尝试：

webSettings.setDatabasePath("/data/data/"+this.getPackageName()+"/databases/");

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