Question

嗨我需要在我的活动之上浮动一个泡泡，我决定使用一个服务。除了在Android 4.xx设备中，imageView没有动画，一切都运行良好。我已经为动画添加了监听器并且运行了动画（它开始，重复......并且值也会改变）但是imageView不会移动。它在Android 5.x设备上运行良好，但不是4.x.任何人都知道为什么？

以下是代码：

select2:unselect

我在另一个视图上尝试了相同的动画，而不是在服务中，它可以工作。我也尝试用旧动画替换ObjectAnimator，问题仍然是一样的。

代码有什么问题吗？

Answer 1

将ImageView放在LinearLayout中修复了imageView没有动画的问题。这是代码：

public class SellFloatingBubbleService extends Service {

public static final int ANIMATION_DURATION = 500;
private WindowManager windowManager;
private ImageView imageView;
private int animationDistance;
private LinearLayout layout;

private static SellFloatingBubbleService instance = null;

public static boolean isInstanceCreated() {
    return instance != null;
}

@Override
public void onCreate() {
    super.onCreate();
    BusProvider.getInstance().post(new BubbleWillBeShownEvent());
    instance = this;
    /**
     * Animations do not work in Android 4.XX if view is not added inside a view group
     */
    layout = new LinearLayout(this);
    layout.setOrientation(LinearLayout.VERTICAL);
    imageView = new ImageView(this);
    layout.addView(imageView, new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
    imageView.setImageResource(R.drawable.tabbar_tooltip_v);
    windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
    animationDistance = (int) getResources().getDimension(R.dimen.sell_bubble_animation_height);
    final WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams(
            LayoutParams.WRAP_CONTENT,
            (int) getResources().getDimension(R.dimen.sell_bubble_window_height),
            LayoutParams.TYPE_PHONE,
            LayoutParams.FLAG_NOT_TOUCH_MODAL, //touch events are transmitted to windows below
            PixelFormat.TRANSLUCENT);
    layoutParams.gravity = Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL;
    layoutParams.windowAnimations = android.R.style.Animation_Toast;
    int sellButtonHeight = getResources().getDimensionPixelOffset(R.dimen
            .sell_button_height);

    layoutParams.y = sellButtonHeight / 2;
    windowManager.addView(layout, layoutParams);
    createAndStartAnimation();
}

private void createAndStartAnimation() {
    /**
     * When these animations will end they will revert and then play endlessly.
     */

    float startValue = imageView.getY();
    float endValue = imageView.getY() - animationDistance;
    AnimatorSet animatorSet = new AnimatorSet();
    ObjectAnimator animYUp = ObjectAnimator.ofFloat(imageView, "y", startValue,
            endValue);
    animYUp.setRepeatMode(ValueAnimator.REVERSE);
    animYUp.setRepeatCount(ValueAnimator.INFINITE);
    animYUp.setDuration(ANIMATION_DURATION);
    animYUp.setInterpolator(new DecelerateInterpolator()); //decelerate interpolator for up

    ObjectAnimator animYDown = ObjectAnimator.ofFloat(imageView, "y", endValue,
            startValue);
    animYDown.setRepeatCount(ValueAnimator.INFINITE);
    animYDown.setDuration(ANIMATION_DURATION);
    animYDown.setInterpolator(new AccelerateInterpolator()); //accelerate interpolator for down
    animatorSet.play(animYDown).after(animYUp);
    animatorSet.start();
}

@Override
public void onDestroy() {
    BusProvider.getInstance().post(new BubbleWillBeHiddenEvent());
    instance = null;
    imageView.setVisibility(View.INVISIBLE);
    windowManager.removeView(layout);
    super.onDestroy();
}

@Override
public IBinder onBind(Intent intent) {
    return null;
}

WindowManager中的imageView动画在android 4.xx中不起作用

1 个答案: