在默认情况下在安卓3.0+，当ActionBar.hide（）/播放（）被称为酒吧是动画用简短的淡入/淡出动画。

By default in Android 3.0+, when ActionBar.hide()/show() are called the bar is animated with a brief fade in/out animation.

似乎没有要与此相关的列表 XML样式属性动画资源。

There does not seem to be an XML style attribute in this list associated with an animation resource.

有没有一些方法来改变这种动画？就我而言，我只是想改变动画时间，但它也可能有一个滑动动画？

Is there some way to change this animation? In my case, I simply want to change the animation time, but is it also possible to have a sliding animation?

推荐答案

没有。

至少在3.0，3.1，或3.2。如果你看一下的反编译源 com.android.internal.app.ActionBarImpl ，你会发现动画是硬codeD。

At least not in 3.0, 3.1, or 3.2. If you look at the decompiled sources of com.android.internal.app.ActionBarImpl you'll find that the animations are hard-coded.

例如，从3.2：

.method public hide()V
    .locals 8

    .prologue
    const/4 v5, 0x0

    const/4 v7, 0x0

    const/4 v6, 0x1

    .line 529
    iget-object v2, p0, Lcom/android/internal/app/ActionBarImpl;->mCurrentAnim:Landroid/animation/Animator;

    if-eqz v2, :cond_0

    .line 530
    iget-object v2, p0, Lcom/android/internal/app/ActionBarImpl;->mCurrentAnim:Landroid/animation/Animator;

    invoke-virtual {v2}, Landroid/animation/Animator;->end()V

    .line 532
    :cond_0
    iget-object v2, p0, Lcom/android/internal/app/ActionBarImpl;->mContainerView:Lcom/android/internal/widget/ActionBarContainer;

    invoke-virtual {v2}, Lcom/android/internal/widget/ActionBarContainer;->getVisibility()I

    move-result v2

    const/16 v3, 0x8

    if-ne v2, v3, :cond_1

    .line 553
    :goto_0
    return-void

    .line 536
    :cond_1
    iget-boolean v2, p0, Lcom/android/internal/app/ActionBarImpl;->mShowHideAnimationEnabled:Z

    if-eqz v2, :cond_3

    .line 537
    iget-object v2, p0, Lcom/android/internal/app/ActionBarImpl;->mContainerView:Lcom/android/internal/widget/ActionBarContainer;

    const/high16 v3, 0x3f80

    invoke-virtual {v2, v3}, Lcom/android/internal/widget/ActionBarContainer;->setAlpha(F)V

    .line 538
    iget-object v2, p0, Lcom/android/internal/app/ActionBarImpl;->mContainerView:Lcom/android/internal/widget/ActionBarContainer;

    invoke-virtual {v2, v6}, Lcom/android/internal/widget/ActionBarContainer;->setTransitioning(Z)V

    .line 539
    new-instance v0, Landroid/animation/AnimatorSet;

    invoke-direct {v0}, Landroid/animation/AnimatorSet;-><init>()V

    .line 540
    .local v0, anim:Landroid/animation/AnimatorSet;
    iget-object v2, p0, Lcom/android/internal/app/ActionBarImpl;->mContainerView:Lcom/android/internal/widget/ActionBarContainer;

    const-string v3, "alpha"

    new-array v4, v6, [F

    aput v5, v4, v7

    invoke-static {v2, v3, v4}, Landroid/animation/ObjectAnimator;->ofFloat(Ljava/lang/Object;Ljava/lang/String;[F)Landroid/animation/ObjectAnimator;

    move-result-object v2

    invoke-virtual {v0, v2}, Landroid/animation/AnimatorSet;->play(Landroid/animation/Animator;)Landroid/animation/AnimatorSet$Builder;

    move-result-object v1

    .line 541
    .local v1, b:Landroid/animation/AnimatorSet$Builder;
    iget-object v2, p0, Lcom/android/internal/app/ActionBarImpl;->mContentView:Landroid/view/View;

    if-eqz v2, :cond_2

    .line 542
    iget-object v2, p0, Lcom/android/internal/app/ActionBarImpl;->mContentView:Landroid/view/View;

    const-string/jumbo v3, "translationY"

    const/4 v4, 0x2

    new-array v4, v4, [F

    aput v5, v4, v7

    iget-object v5, p0, Lcom/android/internal/app/ActionBarImpl;->mContainerView:Lcom/android/internal/widget/ActionBarContainer;

    invoke-virtual {v5}, Lcom/android/internal/widget/ActionBarContainer;->getHeight()I

    move-result v5

    neg-int v5, v5

    int-to-float v5, v5

    aput v5, v4, v6

    invoke-static {v2, v3, v4}, Landroid/animation/ObjectAnimator;->ofFloat(Ljava/lang/Object;Ljava/lang/String;[F)Landroid/animation/ObjectAnimator;

    move-result-object v2

    invoke-virtual {v1, v2}, Landroid/animation/AnimatorSet$Builder;->with(Landroid/animation/Animator;)Landroid/animation/AnimatorSet$Builder;

    .line 544
    iget-object v2, p0, Lcom/android/internal/app/ActionBarImpl;->mContainerView:Lcom/android/internal/widget/ActionBarContainer;

    const-string/jumbo v3, "translationY"

    new-array v4, v6, [F

    iget-object v5, p0, Lcom/android/internal/app/ActionBarImpl;->mContainerView:Lcom/android/internal/widget/ActionBarContainer;

    invoke-virtual {v5}, Lcom/android/internal/widget/ActionBarContainer;->getHeight()I

    move-result v5

    neg-int v5, v5

    int-to-float v5, v5

    aput v5, v4, v7

    invoke-static {v2, v3, v4}, Landroid/animation/ObjectAnimator;->ofFloat(Ljava/lang/Object;Ljava/lang/String;[F)Landroid/animation/ObjectAnimator;

    move-result-object v2

    invoke-virtual {v1, v2}, Landroid/animation/AnimatorSet$Builder;->with(Landroid/animation/Animator;)Landroid/animation/AnimatorSet$Builder;

    .line 547
    :cond_2
    iget-object v2, p0, Lcom/android/internal/app/ActionBarImpl;->mHideListener:Landroid/animation/Animator$AnimatorListener;

    invoke-virtual {v0, v2}, Landroid/animation/AnimatorSet;->addListener(Landroid/animation/Animator$AnimatorListener;)V

    .line 548
    iput-object v0, p0, Lcom/android/internal/app/ActionBarImpl;->mCurrentAnim:Landroid/animation/Animator;

    .line 549
    invoke-virtual {v0}, Landroid/animation/AnimatorSet;->start()V

    goto :goto_0

    .line 551
    .end local v0           #anim:Landroid/animation/AnimatorSet;
    .end local v1           #b:Landroid/animation/AnimatorSet$Builder;
    :cond_3
    iget-object v2, p0, Lcom/android/internal/app/ActionBarImpl;->mHideListener:Landroid/animation/Animator$AnimatorListener;

    const/4 v3, 0x0

    invoke-interface {v2, v3}, Landroid/animation/Animator$AnimatorListener;->onAnimationEnd(Landroid/animation/Animator;)V

    goto :goto_0
.end method

更新

也是一样的ICS和软糖

Same goes for ICS and JellyBean