PhoneGap (Android) Accessing your java files from javascript

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Problem:

You need to access your methods from Activity.java in JavaScript

Solution:

If you are using PhoneGap and developing for a platform independent application then you will have your functions in Javascript. But if you want your javascript file to talk with Activity.java then here's how you do it.

Discussion:

Your Android project will contain all your Javascript and Java files as discussed in 3542.

Add following code to the onCreate() method of your Activity

	super.appView.addJavascriptInterface(new HelperClass(),
				"mActivityInterface");

Create the HelperClass class:

public int state = 0;  
public class HelperClass{  
  
// All the methods that you want to expose to Javascript will go here.  
  
public int getState(){  
    return this.state;  
}  
  
}//end of class

Now in your javascript file you can access the method getState() as follows:

int state = window.mActivityInterface.getState();