Android Service reads localStorage?

Question

I have developed a PhoneGap application for Android. The application is composed by the webapp (HTML/jQuery) and a background service (Java code) that's started by the webapp. This webapp writes to window.localStorage like ``` ``` Is it possible to read this name that is in the localStorage from my Java code?

Accepted Answer

This is possible. To execute JavaScript and get response you can do as follows:

Define JavaScript callback interface in your code:

```
class MyJavaScriptInterface {
    public void someCallback(String jsResult) {
         // this will be passed the local storage name variable
    }
}
```

Attach this callback to your WebView:

```
MyJavaScriptInterface javaInterface = new MyJavaScriptInterface();
webView.addJavascriptInterface(javaInterface, "HTMLOUT");
```

Run your JavaScript calling window.HTMLOUT.someCallback from the script:

```
webView.loadUrl("javascript:( function () { var name = window.localStorage['name']; window.HTMLOUT.someCallback(name); } ) ()");
```

Note - `window.localStorage['name']` is the same as `window.localStorage.getItem('name')`

This post here on stackoverflow helped me

You might need to use `super.webView.addJavascriptInterface` or `super.addJavascriptInterface` to add the interface. You might need to use `super.webView.loadUrl` or `super.loadUrl` to invoke this. It all depends on where you are going to be calling these from.

Android Service reads localStorage?

Solution

Problem

Related problems