My project is mostly a web application. Now I have an android app with a home screen widget and would like to open a web page in the built-in browser on some user actions. T
Yes, this is possible. Use http://developer.android.com/reference/android/provider/Browser.html#EXTRA_APPLICATION_ID to ensure that the same browser tab is reused for your application. For example:
Context context = widget.getContext();
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
intent.putExtra(Browser.EXTRA_APPLICATION_ID, context.getPackageName());