android - WindowManager 中 imageView 的动画在 android 4.xx 中不起作用

Question

您好，我需要在我的 Activity 之上有一个 float 气泡，我决定为此使用一项服务。一切正常，除了在 Android 4.xx 设备中 imageView 没有动画。我已经为动画添加了监听器并且动画运行了(它开始，重复......并且值也改变)但是 imageView 没有移动。它在 Android 5.x 设备上运行良好，但在 4.x 上运行不佳。有人知道为什么吗？

代码如下:

public class SellFloatingBubbleService extends Service {
private WindowManager windowManager;
private ImageView imageView;

@Override
public void onCreate() {
    super.onCreate();
    imageView = new ImageView(this);
    imageView.setImageResource(R.drawable.tabbar_tooltip_v3);
    windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);

    final WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams(
            LayoutParams.WRAP_CONTENT,
            LayoutParams.WRAP_CONTENT,
            LayoutParams.TYPE_PHONE,
            LayoutParams.FLAG_NOT_FOCUSABLE,
            PixelFormat.TRANSLUCENT);
    layoutParams.gravity = Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL;
    layoutParams.y = (int) TypedValue.applyDimension(TypedValue
            .COMPLEX_UNIT_PX, getResources().getDimensionPixelOffset(R.dimen
            .sell_button_height), getResources().getDisplayMetrics());
    windowManager.addView(imageView, layoutParams);
    imageView.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View v) {
            stopSelf();
            return true;
        }
    });

    /**
     * When these animations will end they will revert and then play endlessly.
     */
    AnimatorSet bouncer = new AnimatorSet();
    ObjectAnimator animX = ObjectAnimator.ofFloat(imageView, "scaleX", 1f, 0.8f);
    animX.setRepeatMode(ValueAnimator.REVERSE);
    animX.setRepeatMode(-1);
    ObjectAnimator animY = ObjectAnimator.ofFloat(imageView, "scaleY", 1f, 0.8f);
    animY.setRepeatMode(ValueAnimator.REVERSE);
    animY.setRepeatCount(-1);
    bouncer.playTogether(animX, animY);
    bouncer.setDuration(1000);
    bouncer.setInterpolator(new AccelerateDecelerateInterpolator());
    bouncer.start();
}

@Override
public void onDestroy() {
    imageView.setVisibility(View.GONE);
    windowManager.removeView(imageView);
    super.onDestroy();
}

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

我已经在另一个 View 上尝试了相同的动画，而不是在服务中并且它有效。我也尝试用旧动画替换 ObjectAnimator，但问题仍然存在。

代码有问题吗？

Answer 1

将 ImageView 放在 LinearLayout 中解决了 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;
}