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nickbutcher / view_property_animator.diff
Created July 24, 2019 21:00
/* Copyright 2019 Google LLC.
SPDX-License-Identifier: Apache-2.0 */
- val anim = ObjectAnimator.ofFloat(view, View.ALPHA, targetAlpha)
- if (!visible) {
- anim.doOnEnd { view.visibility = View.GONE }
- }
+ val anim = view.animate().alpha(targetAlpha)
+ if (!visible) {
+ anim.withEndAction { view.visibility = View.GONE }
+ }
@nickbutcher
nickbutcher / spring_binding.diff
Created July 24, 2019 21:03
/* Copyright 2019 Google LLC.
SPDX-License-Identifier: Apache-2.0 */
- val anim = view.animate().alpha(targetAlpha)
+ val spring = view.spring(SpringAnimation.ALPHA)
+ spring.animateToFinalPosition(targetAlpha)
@nickbutcher
nickbutcher / spring_ext_fun.kt
Created July 24, 2019 21:03
/* Copyright 2019 Google LLC.
SPDX-License-Identifier: Apache-2.0 */
fun View.spring(
property: ViewProperty
): SpringAnimation {
val key = getKey(property)
var springAnim = getTag(key) as? SpringAnimation?
if (springAnim == null) {
springAnim = SpringAnimation(this, property)
setTag(key, springAnim)
@nickbutcher
nickbutcher / animated_visibility.kt
Created July 24, 2019 21:08
/* Copyright 2019 Google LLC.
SPDX-License-Identifier: Apache-2.0 */
fun animateVisibility(view: View, visible: Boolean) {
val targetAlpha = if (visible) 1f else 0f
if (view.alpha == targetAlpha) return
view.visibility = View.VISIBLE
val spring = view.spring(SpringAnimation.ALPHA)
(view.getTag(R.id.tag_pending_end_listener) as?
DynamicAnimation.OnAnimationEndListener)?.let {
@nickbutcher
nickbutcher / themes_vs_styles_view_attrs.xml
Created January 29, 2020 12:23
<!-- Copyright 2019 Google LLC.
SPDX-License-Identifier: Apache-2.0 -->
<Button …
android:gravity="center_horizontal"
android:textAppearance="@style/TextAppearance.CommentAuthor"
android:drawablePadding="@dimen/spacing_micro"/>
@nickbutcher
nickbutcher / themes_vs_styles_theme.xml
Created January 29, 2020 12:25
<!-- Copyright 2019 Google LLC.
SPDX-License-Identifier: Apache-2.0 -->
<style name="Theme.Plaid" parent="…">
<item name="colorPrimary">@color/teal_500</item>
<item name="colorSecondary">@color/pink_200</item>
<item name="android:windowBackground">@color/white</item>
</style>
@nickbutcher
nickbutcher / themes_vs_styles_theme_psuedo_interface.kt
Created January 29, 2020 12:27
/* Copyright 2019 Google LLC.
SPDX-License-Identifier: Apache-2.0 */
interface ColorPalette {
@ColorInt val colorPrimary
@ColorInt val colorSecondary
}
class MyView(colors: ColorPalette) {
fab.backgroundTint = colors.colorPrimary
}
@nickbutcher
nickbutcher / themes_vs_styles_theme_psuedo_interface_usage.kt
Created January 29, 2020 12:28
/* Copyright 2019 Google LLC.
SPDX-License-Identifier: Apache-2.0 */
val lightPalette = object : ColorPalette { … }
val darkPalette = object : ColorPalette { … }
val view = MyView(if (isDarkTheme) darkPalette else lightPalette)
@nickbutcher
nickbutcher / themes_vs_styles_theme_usage.xml
Last active January 29, 2020 12:30
<!-- Copyright 2019 Google LLC.
SPDX-License-Identifier: Apache-2.0 -->
<!-- AndroidManifest.xml -->
<application …
android:theme="@style/Theme.Plaid">
<activity …
android:theme="@style/Theme.Plaid.About"/>
<!-- layout/foo.xml -->
@nickbutcher
nickbutcher / themes_vs_styles_theme_attr_usage.xml
Created January 29, 2020 12:32
<!-- Copyright 2019 Google LLC.
SPDX-License-Identifier: Apache-2.0 -->
<ViewGroup …
android:background="?attr/colorSurface">