質問編集履歴
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`PopupWindow`の`setAnimationStyle`には、ドキュメントに`0 for no animation`
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`PopupWindow`の`setAnimationStyle`には、ドキュメントにアニメーション無しは0(`0 for no animation`)と書かれています。
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[material.io](https://material.io/components/menus/android#dropdown-menus)の`List popup window menus`でリスト表示のアニメーションを消去したいのですが、`listPopupWindow.animationStyle = 0`とやってもうまく消えてくれません。
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`listPopupWindow.animationStyle = 0`で、
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`ListPopupWindow`の`setAnimationStyle`が呼ばれその内部で
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`PopupWindow`に（mPopup）`setAnimationStyle`で`animationStyle`をセットしています。
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`PopupWindow`の`setAnimationStyle`には、ドキュメントに`0 for no animation`アニメーション無しは0と書かれています。
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どなたかお知恵を頂けないでしょうか？
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```
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public class ListPopupWindow implements ShowableListMenu {
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PopupWindow mPopup;
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/**
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* Set an animation style to use when the popup window is shown or dismissed.
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*
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* @param animationStyle Animation style to use.
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*/
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public void setAnimationStyle(@StyleRes int animationStyle) {
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mPopup.setAnimationStyle(animationStyle);
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}
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public class PopupWindow {
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/**
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* <p>Change the animation style resource for this popup.</p>
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*
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* <p>If the popup is showing, calling this method will take effect only
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* the next time the popup is shown or through a manual call to one of
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* the {@link #update()} methods.</p>
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*
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@param animationStyle animation style to use when the popup appears
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* @param animationStyle animation style to use when the popup appears
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* and disappears. Set to -1 for the default animation, 0 for no
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* animation, or a resource identifier for an explicit animation.
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*
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* @see #update()
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*/
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public void setAnimationStyle(int animationStyle) {
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mAnimationStyle = animationStyle;
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}
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```
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