How to open MainActivity from asset file in another activity

Question

I have two activities called:

1. MainActivity.java
2. page1.java

page1.java contains my asset file (file:///android_asset/index.html). This is working very well.

Code in page1.java contains something like this:

engine.loadUrl("file:///android_asset/index.html");

I want to add an URL in index.html file to go to MainActivity.java.

Can you help me?

Answer 1

In index.html add

<a href="javascript:Android.launchMain()">MainActivty</a>

Now create a new class named ActivityLauncher

public class ActivityLauncher {
private Context m_context;

public ActivityLauncher(Context context) {
    m_context = context;
}
@JavascriptInterface
public void launchMain() {
    m_context.startActivity(new Intent((Activity)m_context,
         MainActivity.class));
   }
}

Now add this lines in page1.java

webView.addJavascriptInterface(new ActivityLauncher(this), "Android");