本頁面由 Cloud Translation API 翻譯而成。

資訊方塊動畫

您可以透過幾種不同方式製作資訊方塊動畫，包括：

使用補間動畫產生掃除轉場效果。
對資訊方塊套用順暢的淡入/淡出和滑動動畫。

呈現掃除轉場效果

如要呈現一個值到另一個值之間的順暢掃除效果，可以為元素啟用補間動畫，如以下程式碼片段所示：

Kotlin

private val defaultValue = 0f
private var startValue = 15f
private var endValue = 105f
private val animationDurationInMillis = 2000f // 2 seconds

override fun onTileRequest(requestParams: TileRequest) =
    Futures.immediateFuture(
        // Add timeline and layout containers. CircularProgressIndicator is an
        // inner element of those containers.
        CircularProgressIndicator.Builder()
            .setProgress(
                FloatProp.Builder(/* static value */ 0.25f)
                    .setDynamicValue(
                    // Or you can use some other dynamic object, for example
                    // from the platform and then at the end of expression
                    // add animate().
                        DynamicFloat.animate(startValue, endValue,
                            AnimationSpec.Builder()
                                .setAnimationParameters(
                                    AnimationParameters.Builder()
                                        .setDurationMillis(animationDurationInMillis)
                                        .build()
                                ).build()
                        )
                    ).build()
            ).build()
        // Finish building all elements that contain CircularProgressIndicator.
    )

Java

private float defaultValue = 0f;
private float startValue = 15f;
private float endValue = 105f;
private float animationDurationInMillis = 2000f; // 2 seconds

@Override
protected ListenableFuture<Tile> onTileRequest(
       @NonNull TileRequest requestParams
) {
    return Futures.immediateFuture(
        // Add timeline and layout containers. CircularProgressIndicator is an
        // inner element of those containers.
        new CircularProgressIndicator.Builder()
            .setProgress(
                new FloatProp.Builder(/* static value */ 0.25f)
                    .setDynamicValue(
                    // Or you can use some other dynamic object, for example
                    // from the platform and then at the end of expression
                    // add animate().
                        DynamicFloat.animate(startValue, endValue,
                            new AnimationSpec.Builder()
                                .setAnimationParameters(
                                    new AnimationParameters.Builder()
                                        .setDurationMillis(animationDurationInMillis)
                                        .build()
                                ).build()
                        )
                    ).build()
            ).build()
        // Finish building all elements that contain CircularProgressIndicator.
    );
}

設定弧形方向

如果您的資訊方塊包含弧形，您可能不希望弧線或文字始終根據使用者所選語言的預設文字方向擴增。如要指定如果是弧形成長方向，請使用 ArcDirection API：

Kotlin

@OptIn(ProtoLayoutExperimental::class)
public override fun onTileRequest(
        requestParams: RequestBuilders.TileRequest
): ListenableFuture<Tile> {
    return Futures.immediateFuture(Tile.Builder()
        .setResourcesVersion(RESOURCES_VERSION)
        .setTileTimeline(Timeline.fromLayoutElement(
            EdgeContentLayout.Builder(deviceParameters)
                .setEdgeContent(
                    Arc.Builder()
                        // Arc should always grow clockwise.
                        .setArcDirection(LayoutElementBuilders.ARC_DIRECTION_CLOCKWISE)
                        .addContent(
                            ArcLine.Builder()
                            // Set color, length, thickness, and more.
                            // Arc should always grow clockwise.
                            .setArcDirection(
                                LayoutElementBuilders.ARC_DIRECTION_CLOCKWISE)
                            .build()
                        ).build()
                ).build())
        ).build()
    )
}

Java

@OptIn(markerClass = ProtoLayoutExperimental.class)
@NonNull
@Override
protected ListenableFuture<Tile> onTileRequest(
        @NonNull RequestBuilders.TileRequest requestParams
) {
    return Futures.immediateFuture(new Tile.Builder()
        .setResourcesVersion(RESOURCES_VERSION)
        .setTileTimeline(Timeline.fromLayoutElement(
            new EdgeContentLayout.Builder(deviceParameters)
                .setEdgeContent(
                    new Arc.Builder()
                        // Arc should always grow clockwise.
                        .setArcDirection(LayoutElementBuilders.ARC_DIRECTION_CLOCKWISE)
                        .addContent(
                            new ArcLine.Builder()
                            // Set color, length, thickness, and more.
                            // Arc should always grow clockwise.
                            .setArcDirection(
                                LayoutElementBuilders.ARC_DIRECTION_CLOCKWISE)
                            .build())
                        .build())
                .build()))
        .build()
    );
}

呈現順暢的淡入/淡出或滑動效果

如要明確強調元素在資訊方塊內出現或消失的動作，或是要巧妙呈現資訊方塊內的值逐步變動的效果，請在資訊方塊動畫中使用淡入/淡出和滑動效果。

如果資訊方塊版面配置內的元素包含會變動的值，資訊方塊會顯示該元素的退出動畫，然後更新版面配置並顯示該元素的進入動畫。

淡入/淡出轉場效果

下列程式碼片段展示如何使用 DefaultContentTransitions 提供的輔助方法執行淡入和淡出轉場效果。如要定義自訂 FadeInTransition 和 FadeOutTransition 物件，請分別呼叫轉場 setter 方法中的 setFadeIn() 和 setFadeOut()。

Kotlin

@OptIn(ProtoLayoutExperimental::class)
public override fun onTileRequest(
        requestParams: RequestBuilders.TileRequest
): ListenableFuture<Tile> {
    // Assumes that you've defined a custom helper method called
    // getTileTextToShow().
    val tileText = getTileTextToShow()
    return Futures.immediateFuture(Tile.Builder()
        .setResourcesVersion(RESOURCES_VERSION)
        .setTileTimeline(Timeline.fromLayoutElement(
            Text.Builder(this, tileText)
                .setModifiers(
                    ModifiersBuilders.Modifiers.Builder()
                        .setContentUpdateAnimation(AnimatedVisibility.Builder()
                            .setEnterTransition(
                                    DefaultContentTransitions.fadeIn())
                            .setExitTransition(
                                    DefaultContentTransitions.fadeOut()
                            ).build())
                ).build())
        ).build()
    )
}

Java

@OptIn(markerClass = ProtoLayoutExperimental.class)
@NonNull
@Override
protected ListenableFuture<Tile> onTileRequest(
        @NonNull RequestBuilders.TileRequest requestParams
) {
    // Assumes that you've defined a custom helper method called
    // getTileTextToShow().
    String tileText = getTileTextToShow();

    return Futures.immediateFuture(new Tile.Builder()
        .setResourcesVersion(RESOURCES_VERSION)
        .setTileTimeline(Timeline.fromLayoutElement(
            new Text.Builder(this, tileText)
                .setModifiers(
                    new ModifiersBuilders.Modifiers.Builder()
                        .setContentUpdateAnimation(new AnimatedVisibility.Builder()
                            .setEnterTransition(
                                    DefaultContentTransitions.fadeIn())
                            .setExitTransition(
                                    DefaultContentTransitions.fadeOut())
                            .build())
                .build()))
        .build()
    );
}

滑動轉場效果

以下另一個程式碼片段展示如何使用 DefaultContentTransitions 提供的輔助方法執行滑入和滑出轉場效果。您也可以分別呼叫轉場 setter 方法中的 setSlideIn() 和 setSlideOut()，定義自訂 SlideInTransition 和 SlideOutTransition 物件。

Kotlin

@OptIn(ProtoLayoutExperimental::class)
public override fun onTileRequest(
    requestParams: RequestBuilders.TileRequest
): ListenableFuture<Tile> {
    // Assumes that you've defined a custom helper method called
    // getTileTextToShow().
    val tileText = getTileTextToShow()
    return Futures.immediateFuture(Tile.Builder()
        .setResourcesVersion(RESOURCES_VERSION)
        .setTileTimeline(Timeline.fromLayoutElement(
            Text.Builder(this, tileText)
                .setModifiers(
                    Modifiers.Builder()
                         .setContentUpdateAnimation(AnimatedVisibility.Builder()
                            .setEnterTransition(
                                DefaultContentTransitions.slideIn(
                                    SLIDE_DIRECTION_LEFT_TO_RIGHT)
                            ).setExitTransition(
                                DefaultContentTransitions.slideOut(
                                    SLIDE_DIRECTION_LEFT_TO_RIGHT)
                            ).build()
                        ).build()
                ).build()
        )).build()
    )
}

Java

@OptIn(markerClass = ProtoLayoutExperimental.class)
@NonNull
@Override
protected ListenableFuture<Tile> onTileRequest(
        @NonNull RequestBuilders.TileRequest requestParams
) {
    // Assumes that you've defined a custom helper method called
    // getTileTextToShow().
    String tileText = getTileTextToShow();
    return Futures.immediateFuture(Tile.Builder()
        .setResourcesVersion(RESOURCES_VERSION)
        .setTileTimeline(Timeline.fromLayoutElement(
            new Text.Builder(this, tileText)
                .setModifiers(
                    new Modifiers.Builder()
                        .setContentUpdateAnimation(
                            new AnimatedVisibility.Builder()
                                .setEnterTransition(
                                    DefaultContentTransitions.slideIn(
                                        SLIDE_DIRECTION_LEFT_TO_RIGHT))
                                .setExitTransition(
                                    DefaultContentTransitions.slideOut(
                                        SLIDE_DIRECTION_LEFT_TO_RIGHT))
                                .build())
                        .build())
                .build()))
        .build()
    );
}

顯示轉換效果

如要強調資訊方塊中的特定元素或區域，您可以套用轉換類型，包括旋轉、縮放和翻譯

許多與轉換相關聯的浮點值可接受動態運算式，可讓您為這些轉換加上動畫效果。

旋轉

如要針對自訂樞紐點執行順時針旋轉，請使用程式碼類似這樣：

Kotlin

// Last line in your onTileRequest() method implementation.
return Futures.immediateFuture(Tile.Builder()
    .setResourcesVersion(RESOURCES_VERSION)
    .setTileTimeline(Timeline.fromLayoutElement(
        Text.Builder(this, someTileText)
            .setModifiers(
                    ModifiersBuilders.Transformation.Builder()
                        // Set the pivot point 50 dp from the left edge
                        // and 100 dp from the top edge of the screen.
                        .setPivotX(dp(50))
                        .setPivotY(dp(100))
                        // Rotate the element 45 degrees clockwise.
                        .setRotation(
                            degrees(45f)
                        ).build()
            ).build())
    ).build()
)

Java

// Last line in your onTileRequest() method implementation.
return Futres.immediateFuture(new Tile.Builder()
    .setResourcesVersion(RESOURCES_VERSION)
    .setTileTimeline(Timeline.fromLayoutElement(
        new Text.Builder(this, someTileText)
            .setModifiers(
                    new ModifiersBuilders.Transformation.Builder()
                        // Set the pivot point 50 dp from the left edge
                        // and 100 dp from the top edge of the screen.
                        .setPivotX(dp(50))
                        .setPivotY(dp(100))
                        // Rotate the element 45 degrees clockwise.
                        .setRotation(
                            degrees(45f))
                        .build())
            .build()))
    .build()
);

縮放

如要依照水平和垂直縮放比例係數來放大或縮小元素，請使用類似下方的程式碼：

Kotlin

// Last line in your onTileRequest() method implementation.
return Futures.immediateFuture(Tile.Builder()
    .setResourcesVersion(RESOURCES_VERSION)
    .setTileTimeline(Timeline.fromLayoutElement(
        Text.Builder(this, someTileText)
            .setModifiers(
                    ModifiersBuilders.Transformation.Builder()
                        // Set the pivot point 50 dp from the left edge
                        // and 100 dp from the top edge of the screen.
                        .setPivotX(dp(50))
                        .setPivotY(dp(100))
                        // Shrink the element by a scale factor
                        // of 0.5 horizontally and 0.75 vertically.
                        .setScaleX(TypeBuilders.FloatProp.Builder(0.5f)
                                .build())
                        .setScaleY(TypeBuilders.FloatProp.Builder(0.75f)
                                .build()
                        ).build()
            ).build())
    ).build()
)

Java

// Last line in your onTileRequest() method implementation.
return Futres.immediateFuture(new Tile.Builder()
    .setResourcesVersion(RESOURCES_VERSION)
    .setTileTimeline(Timeline.fromLayoutElement(
        new Text.Builder(this, someTileText)
            .setModifiers(
                    new ModifiersBuilders.Transformation.Builder()
                        // Set the pivot point 50 dp from the left edge
                        // and 100 dp from the top edge of the screen.
                        .setPivotX(dp(50))
                        .setPivotY(dp(100))
                        // Shrink the element by a scale factor
                        // of 0.5 horizontally and 0.75 vertically.
                        .setScaleX(new TypeBuilders.FloatProp.Builder(0.5f)
                                .build())
                        .setScaleY(new TypeBuilders.FloatProp.Builder(0.75f)
                                .build())
                        .build())
            .build()))
    .build()
);

幾何平移

以特定密度像素 (dp) 為單位移動元素請水平或垂直方向使用類似下方的程式碼：

Kotlin

// Last line in your onTileRequest() method implementation.
return Futures.immediateFuture(Tile.Builder()
    .setResourcesVersion(RESOURCES_VERSION)
    .setTileTimeline(Timeline.fromLayoutElement(
        Text.Builder(this, someTileText)
            .setModifiers(
                    ModifiersBuilders.Transformation.Builder()
                        // Translate (move) the element 60 dp to the right
                        // and 80 dp down.
                        .setTranslationX(dp(60))
                        .setTranslationY(dp(80))
                        .build()
            ).build())
    ).build()
)

Java

// Last line in your onTileRequest() method implementation.
return Futres.immediateFuture(new Tile.Builder()
    .setResourcesVersion(RESOURCES_VERSION)
    .setTileTimeline(Timeline.fromLayoutElement(
        new Text.Builder(this, someTileText)
            .setModifiers(
                    new ModifiersBuilders.Transformation.Builder()
                        // Translate (move) the element 60 dp to the right
                        // and 80 dp down.
                        .setTranslationX(dp(60))
                        .setTranslationY(dp(80))
                        .build())
            .build()))
    .build()
);

不要在動畫播放期間顯示重要資訊

發生以下情況時，系統會停用動畫：

系統的資訊方塊轉譯功能可能會停用所有資訊方塊的動畫。
資訊方塊一次只能顯示 4 個元素的動畫。如果嘗試顯示超過 4 個元素的動畫，其中有些元素會無法顯示動畫。

如果動畫已停用，元素就會處於靜態，並呈現動畫最後的值。因此，請不要依賴動畫的行為 (例如動畫播放期間) 來顯示重要資訊。