Android - 带有Transition动画的TabActivity

Question

我正在尝试向TabActivty添加动画.例如,当用户选择第二个选项卡时,我希望新活动来自右侧.当用户选择第一个选项卡时,我希望活动来自左侧.

我已经找到了如何添加一个动画,但我想再添一个动画.这是我正在使用的代码:

public 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);
    inFromRight.setDuration(240);
    inFromRight.setInterpolator(new AccelerateInterpolator());
    return inFromRight;
}

和

getTabHost().setOnTabChangedListener(new OnTabChangeListener() {
       public void onTabChanged(String tabId)
       {
           View currentView = getTabHost().getCurrentView();
           currentView.setAnimation( inFromRightAnimation() );
       }
});

我怎样才能做到这一点？

谢谢.

问候.

V.

Answer 1

这工作正常:

getTabHost().setOnTabChangedListener(new OnTabChangeListener() {
     public void onTabChanged(String tabId)
     {
            View currentView = getTabHost().getCurrentView();
            if (getTabHost().getCurrentTab() > currentTab)
            {
                currentView.setAnimation( inFromRightAnimation() );
            }
            else
            {
                currentView.setAnimation( outToRightAnimation() );
            }

            currentTab = getTabHost().getCurrentTab();
     }
});

和动画:

public 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);
    inFromRight.setDuration(240);
    inFromRight.setInterpolator(new AccelerateInterpolator());
    return inFromRight;
}

public Animation outToRightAnimation()
{
    Animation outtoLeft = 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);
    outtoLeft.setDuration(240);
    outtoLeft.setInterpolator(new AccelerateInterpolator());
    return outtoLeft;
}

Answer 2

我根据我想要分享的代码编写了一个自定义的OnTabChangeListener.希望有人可以使用它:).归功于Vomenki的原始代码.

package net.danielkvist.receipttracker.listener;

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;
    }
}