try this code:
import android.view.View;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;
/**
* A custom OnTabChangeListener that uses the TabHost its related to to fetch information about the current and previous
* tabs. It uses this information to perform some custom animations that slide the tabs in and out from left and right.
*
* @author Daniel Kvist
*
*/
public class AnimatedTabHostListener implements OnTabChangeListener
{
private static final int ANIMATION_TIME = 240;
private TabHost tabHost;
private View previousView;
private View currentView;
private int currentTab;
/**
* Constructor that takes the TabHost as a parameter and sets previousView to the currentView at instantiation
*
* @param tabHost
*/
public AnimatedTabHostListener(TabHost tabHost)
{
this.tabHost = tabHost;
this.previousView = tabHost.getCurrentView();
}
/**
* When tabs change we fetch the current view that we are animating to and animate it and the previous view in the
* appropriate directions.
*/
@Override
public void onTabChanged(String tabId)
{
currentView = tabHost.getCurrentView();
if (tabHost.getCurrentTab() > currentTab)
{
previousView.setAnimation(outToLeftAnimation());
currentView.setAnimation(inFromRightAnimation());
}
else
{
previousView.setAnimation(outToRightAnimation());
currentView.setAnimation(inFromLeftAnimation());
}
previousView = currentView;
currentTab = tabHost.getCurrentTab();
}
/**
* Custom animation that animates in from right
*
* @return Animation the Animation object
*/
private Animation inFromRightAnimation()
{
Animation inFromRight = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 1.0f, Animation.RELATIVE_TO_PARENT, 0.0f,
Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
return setProperties(inFromRight);
}
/**
* Custom animation that animates out to the right
*
* @return Animation the Animation object
*/
private Animation outToRightAnimation()
{
Animation outToRight = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 1.0f,
Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
return setProperties(outToRight);
}
/**
* Custom animation that animates in from left
*
* @return Animation the Animation object
*/
private Animation inFromLeftAnimation()
{
Animation inFromLeft = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, -1.0f, Animation.RELATIVE_TO_PARENT, 0.0f,
Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
return setProperties(inFromLeft);
}
/**
* Custom animation that animates out to the left
*
* @return Animation the Animation object
*/
private Animation outToLeftAnimation()
{
Animation outtoLeft = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, -1.0f,
Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
return setProperties(outtoLeft);
}
/**
* Helper method that sets some common properties
* @param animation the animation to give common properties
* @return the animation with common properties
*/
private Animation setProperties(Animation animation)
{
animation.setDuration(ANIMATION_TIME);
animation.setInterpolator(new AccelerateInterpolator());
return animation;
}
}
