ViewSwitcher in Android - switching layouts for activity

Let us say you want to change the layout in same activity e.g. you want to show a list of urls and when one of them is clicked, you want to show webview on the entire screen. One solution could be to use a dialog, but a dialog will not use the screen area effectively.
In such cases you can use ViewSwitcher.  A viewswitcher can have two child views and only one of them is shown at a time.
The two views you want to use must be wrapped in the viewswitcher  as shown in the xml file below.


   xmlns:android="http://schemas.android.com/apk/res/android"
       android:id = "@+id/viewswitcher"
   ---

   -----
>
 
    android:layout_width="fill_parent"
    ------->
   
   

        android:layout_width="fill_parent"
         -------------------
        ------------------->
         


    android:layout_width="fill_parent"
     ------------------>
   
   
    android:layout_width="fill_parent"
   ---------------------->
   
 

 

In this xml file, the two linear layouts are child views of view switcher. One of them has a gridview and the other has a webview.

Add this line in your onCreate function of the activity to get the viewSwitcher from xml

mViewSwitcher = (ViewSwitcher)findViewById(R.id.viewSwitcher1);

To start with, first child view will be shown. Now you can display the other child view, in this case webview by calling viewswitcher.showNext() and viewswitcher.showPrevious()

        public void onItemClick(AdapterView arg0, View arg1, int arg2,long arg3) {
            -------
            mViewSwitcher.showNext();
                               -------
        }
@Override
    public void onBackPressed(){
        if(mWebView.isShown()){
             mViewSwitcher.showPrevious();
           ---------
        }
    }

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