이 가이드에서는 탭하여 확대/축소 애니메이션을 구현하는 방법을 보여줍니다. 탭하여 확대/축소를 통해 미리보기 이미지에서 보기를 애니메이션으로 채워 화면을 채웁니다.
'탭하여 확대/축소' 애니메이션은 썸네일을 확장하여 화면:
전체 작동 예는 UIAnimation
클래스를 참고하세요.
WearSpeakerSample
GitHub에서 확인해 보세요.
뷰 만들기
확대/축소하려는 콘텐츠의 큰 버전과 작은 버전이 포함된 레이아웃 파일을 만듭니다.
다음 예시에서는
탭 가능한 항목의 경우 ImageButton
이미지 썸네일과
다음을 표시하는 ImageView
:
이미지를 확대하면 다음과 같습니다.
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="16dp">
<ImageButton
android:id="@+id/thumb_button_1"
android:layout_width="100dp"
android:layout_height="75dp"
android:layout_marginRight="1dp"
android:src="@drawable/thumb1"
android:scaleType="centerCrop"
android:contentDescription="@string/description_image_1" />
</LinearLayout>
<!-- This initially hidden ImageView
holds the zoomed version of
the preceding images. Without transformations applied, it fills the entire
screen. To achieve the zoom animation, this view's bounds are animated
from the bounds of the preceding thumbnail button to its final laid-out
bounds.
-->
<ImageView
android:id="@+id/expanded_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="invisible"
android:contentDescription="@string/description_zoom_touch_close" />
</FrameLayout>
확대/축소 애니메이션 설정
레이아웃을 적용했으면 확대/축소 애니메이션을 트리거하는 이벤트 핸들러를 설정합니다. 이
다음 예는
View.OnClickListener
부터
사용자가 이미지 버튼을 탭할 때 확대/축소 애니메이션을 실행하는 ImageButton
Kotlin
class ZoomActivity : FragmentActivity() { // Hold a reference to the current animator so that it can be canceled // midway. private var currentAnimator: Animator? = null // The system "short" animation time duration in milliseconds. This duration // is ideal for subtle animations or animations that occur frequently. private var shortAnimationDuration: Int = 0 override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_zoom) // Hook up taps on the thumbnail views. binding.thumbButton1.setOnClickListener { zoomImageFromThumb(thumb1View, R.drawable.image1) } // Retrieve and cache the system's default "short" animation time. shortAnimationDuration = resources.getInteger(android.R.integer.config_shortAnimTime) } ... }
자바
public class ZoomActivity extends FragmentActivity { // Hold a reference to the current animator so that it can be canceled // mid-way. private Animator currentAnimator; // The system "short" animation time duration in milliseconds. This duration // is ideal for subtle animations or animations that occur frequently. private int shortAnimationDuration; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_zoom); // Hook up taps on the thumbnail views. binding.thumbButton1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { zoomImageFromThumb(thumb1View, R.drawable.image1); } }); // Retrieve and cache the system's default "short" animation time. shortAnimationDuration = getResources().getInteger( android.R.integer.config_shortAnimTime); } ... }
뷰 확대/축소
필요한 경우 보통 크기의 보기에서 확대/축소된 보기로 애니메이션을 적용합니다. 일반적으로
보통 크기의 뷰 경계에서 더 큰 크기의 뷰 경계로 애니메이션합니다. 이
다음 메서드는 썸네일 이미지에서 확대된 이미지로 확대/축소하는 확대/축소 애니메이션을 구현하는 방법을 보여줍니다.
합니다. 이렇게 하려면 고해상도 이미지를 숨겨진 '확대'된 (확대됨)
ImageView
다음 예에서는 편의를 위해 UI 스레드에 큰 이미지 리소스를 로드합니다.
비트맵을 설정하여 UI 스레드에서의 차단을 방지해야 합니다.
일반적으로 비트맵은 화면 크기보다 크지 않아야 합니다. 다음으로 시작 및
ImageView
의 끝 경계입니다.
Kotlin
private fun zoomImageFromThumb(thumbView: View, imageResId: Int) { // If there's an animation in progress, cancel it immediately and // proceed with this one. currentAnimator?.cancel() // Load the high-resolution "zoomed-in" image. binding.expandedImage.setImageResource(imageResId) // Calculate the starting and ending bounds for the zoomed-in image. val startBoundsInt = Rect() val finalBoundsInt = Rect() val globalOffset = Point() // The start bounds are the global visible rectangle of the thumbnail, // and the final bounds are the global visible rectangle of the // container view. Set the container view's offset as the origin for the // bounds, since that's the origin for the positioning animation // properties (X, Y). thumbView.getGlobalVisibleRect(startBoundsInt) binding.container.getGlobalVisibleRect(finalBoundsInt, globalOffset) startBoundsInt.offset(-globalOffset.x, -globalOffset.y) finalBoundsInt.offset(-globalOffset.x, -globalOffset.y) val startBounds = RectF(startBoundsInt) val finalBounds = RectF(finalBoundsInt) // Using the "center crop" technique, adjust the start bounds to be the // same aspect ratio as the final bounds. This prevents unwanted // stretching during the animation. Calculate the start scaling factor. // The end scaling factor is always 1.0. val startScale: Float if ((finalBounds.width() / finalBounds.height() > startBounds.width() / startBounds.height())) { // Extend start bounds horizontally. startScale = startBounds.height() / finalBounds.height() val startWidth: Float = startScale * finalBounds.width() val deltaWidth: Float = (startWidth - startBounds.width()) / 2 startBounds.left -= deltaWidth.toInt() startBounds.right += deltaWidth.toInt() } else { // Extend start bounds vertically. startScale = startBounds.width() / finalBounds.width() val startHeight: Float = startScale * finalBounds.height() val deltaHeight: Float = (startHeight - startBounds.height()) / 2f startBounds.top -= deltaHeight.toInt() startBounds.bottom += deltaHeight.toInt() } // Hide the thumbnail and show the zoomed-in view. When the animation // begins, it positions the zoomed-in view in the place of the // thumbnail. thumbView.alpha = 0f animateZoomToLargeImage(startBounds, finalBounds, startScale) setDismissLargeImageAnimation(thumbView, startBounds, startScale) }
자바
private void zoomImageFromThumb(final View thumbView, int imageResId) { // If there's an animation in progress, cancel it immediately and // proceed with this one. if (currentAnimator != null) { currentAnimator.cancel(); } // Load the high-resolution "zoomed-in" image. binding.expandedImage.setImageResource(imageResId); // Calculate the starting and ending bounds for the zoomed-in image. final Rect startBounds = new Rect(); final Rect finalBounds = new Rect(); final Point globalOffset = new Point(); // The start bounds are the global visible rectangle of the thumbnail, // and the final bounds are the global visible rectangle of the // container view. Set the container view's offset as the origin for the // bounds, since that's the origin for the positioning animation // properties (X, Y). thumbView.getGlobalVisibleRect(startBounds); findViewById(R.id.container) .getGlobalVisibleRect(finalBounds, globalOffset); startBounds.offset(-globalOffset.x, -globalOffset.y); finalBounds.offset(-globalOffset.x, -globalOffset.y); // Using the "center crop" technique, adjust the start bounds to be the // same aspect ratio as the final bounds. This prevents unwanted // stretching during the animation. Calculate the start scaling factor. // The end scaling factor is always 1.0. float startScale; if ((float) finalBounds.width() / finalBounds.height() > (float) startBounds.width() / startBounds.height()) { // Extend start bounds horizontally. startScale = (float) startBounds.height() / finalBounds.height(); float startWidth = startScale * finalBounds.width(); float deltaWidth = (startWidth - startBounds.width()) / 2; startBounds.left -= deltaWidth; startBounds.right += deltaWidth; } else { // Extend start bounds vertically. startScale = (float) startBounds.width() / finalBounds.width(); float startHeight = startScale * finalBounds.height(); float deltaHeight = (startHeight - startBounds.height()) / 2; startBounds.top -= deltaHeight; startBounds.bottom += deltaHeight; } // Hide the thumbnail and show the zoomed-in view. When the animation // begins, it positions the zoomed-in view in the place of the // thumbnail. thumbView.setAlpha(0f); animateZoomToLargeImage(startBounds, finalBounds, startScale); setDismissLargeImageAnimation(thumbView, startBounds, startScale); }
네 가지 배치 및 크기 애니메이션
속성: X
,
Y
,
SCALE_X
,
및
SCALE_Y
: 동시에
시작 경계에서 끝 경계까지입니다. 이 4개의 애니메이션을
AnimatorSet
시작하도록 합시다.
Kotlin
private fun animateZoomToLargeImage(startBounds: RectF, finalBounds: RectF, startScale: Float) { binding.expandedImage.visibility = View.VISIBLE // Set the pivot point for SCALE_X and SCALE_Y transformations to the // top-left corner of the zoomed-in view. The default is the center of // the view. binding.expandedImage.pivotX = 0f binding.expandedImage.pivotY = 0f // Construct and run the parallel animation of the four translation and // scale properties: X, Y, SCALE_X, and SCALE_Y. currentAnimator = AnimatorSet().apply { play( ObjectAnimator.ofFloat( binding.expandedImage, View.X, startBounds.left, finalBounds.left) ).apply { with(ObjectAnimator.ofFloat(binding.expandedImage, View.Y, startBounds.top, finalBounds.top)) with(ObjectAnimator.ofFloat(binding.expandedImage, View.SCALE_X, startScale, 1f)) with(ObjectAnimator.ofFloat(binding.expandedImage, View.SCALE_Y, startScale, 1f)) } duration = shortAnimationDuration.toLong() interpolator = DecelerateInterpolator() addListener(object : AnimatorListenerAdapter() { override fun onAnimationEnd(animation: Animator) { currentAnimator = null } override fun onAnimationCancel(animation: Animator) { currentAnimator = null } }) start() } }
자바
private void animateZoomToLargeImage(Rect startBounds, Rect finalBounds, Float startScale) { binding.expandedImage.setVisibility(View.VISIBLE); // Set the pivot point for SCALE_X and SCALE_Y transformations to the // top-left corner of the zoomed-in view. The default is the center of // the view. binding.expandedImage.setPivotX(0f); binding.expandedImage.setPivotY(0f); // Construct and run the parallel animation of the four translation and // scale properties: X, Y, SCALE_X, and SCALE_Y. AnimatorSet set = new AnimatorSet(); set .play(ObjectAnimator.ofFloat(binding.expandedImage, View.X, startBounds.left, finalBounds.left)) .with(ObjectAnimator.ofFloat(binding.expandedImage, View.Y, startBounds.top, finalBounds.top)) .with(ObjectAnimator.ofFloat(binding.expandedImage, View.SCALE_X, startScale, 1f)) .with(ObjectAnimator.ofFloat(binding.expandedImage, View.SCALE_Y, startScale, 1f)); set.setDuration(shortAnimationDuration); set.setInterpolator(new DecelerateInterpolator()); set.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { currentAnimator = null; } @Override public void onAnimationCancel(Animator animation) { currentAnimator = null; } }); set.start(); currentAnimator = set; }
사용자가 이미지가 있는 동안 화면을 탭하면 유사한 애니메이션을 역방향으로 실행하여 축소
확대됩니다. ImageView
에 View.OnClickListener
를 추가합니다. 탭하면
ImageView
는 이미지 썸네일 크기로 최소화되고 공개 상태를
숨기려면 GONE
하세요.
Kotlin
private fun setDismissLargeImageAnimation(thumbView: View, startBounds: RectF, startScale: Float) { // When the zoomed-in image is tapped, it zooms down to the original // bounds and shows the thumbnail instead of the expanded image. binding.expandedImage.setOnClickListener { currentAnimator?.cancel() // Animate the four positioning and sizing properties in parallel, // back to their original values. currentAnimator = AnimatorSet().apply { play(ObjectAnimator.ofFloat(binding.expandedImage, View.X, startBounds.left)).apply { with(ObjectAnimator.ofFloat(binding.expandedImage, View.Y, startBounds.top)) with(ObjectAnimator.ofFloat(binding.expandedImage, View.SCALE_X, startScale)) with(ObjectAnimator.ofFloat(binding.expandedImage, View.SCALE_Y, startScale)) } duration = shortAnimationDuration.toLong() interpolator = DecelerateInterpolator() addListener(object : AnimatorListenerAdapter() { override fun onAnimationEnd(animation: Animator) { thumbView.alpha = 1f binding.expandedImage.visibility = View.GONE currentAnimator = null } override fun onAnimationCancel(animation: Animator) { thumbView.alpha = 1f binding.expandedImage.visibility = View.GONE currentAnimator = null } }) start() } } }
Java
private void setDismissLargeImageAnimation(View thumbView, Rect startBounds, Float startScale) { // When the zoomed-in image is tapped, it zooms down to the original // bounds and shows the thumbnail instead of the expanded image. final float startScaleFinal = startScale; binding.expandedImage.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (currentAnimator != null) { currentAnimator.cancel(); } // Animate the four positioning and sizing properties in // parallel, back to their original values. AnimatorSet set = new AnimatorSet(); set.play(ObjectAnimator .ofFloat(binding.expandedImage, View.X, startBounds.left)) .with(ObjectAnimator .ofFloat(binding.expandedImage, View.Y,startBounds.top)) .with(ObjectAnimator .ofFloat(binding.expandedImage, View.SCALE_X, startScaleFinal)) .with(ObjectAnimator .ofFloat(binding.expandedImage, View.SCALE_Y, startScaleFinal)); set.setDuration(shortAnimationDuration); set.setInterpolator(new DecelerateInterpolator()); set.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { thumbView.setAlpha(1f); binding.expandedImage.setVisibility(View.GONE); currentAnimator = null; } @Override public void onAnimationCancel(Animator animation) { thumbView.setAlpha(1f); binding.expandedImage.setVisibility(View.GONE); currentAnimator = null; } }); set.start(); currentAnimator = set; } }); }