Do the Loco-MotionLayout - droidcon Boston 2019

A presentation on implementing a crazy dribbble design using MotionLayout.

Transcript

1. @mikescamell Do the Loco-MotionLayout droidcon Boston 2019 @mikescamell HERE!!!
2. @mikescamell Before we begin…
3. @mikescamell
4. @mikescamell MWUHAHAHAHAHA HAHAHAHAHAHAH AHAHAHHAHAHAH AHAHAHAHAHAHA HAHAHAHAHAHAH AHAHAHAHAHA!!!!! L O L O L O L O L O L O L O L @johnhoford
5. @mikescamell by Nikita Duhovny
6. – Nicolas Roard “A mix between the property animation framework, layout transitions with TransitionManager, and CoordinatorLayout” MotionLayout
7. @mikescamell Scene 1 - Part 1
8. @mikescamell Scene 1 - Part 1 <ConstraintLayout android:layout_width="match_parent" android:layout_height="match_parent"> <ImageView android:id="@+id/bookCover" android:layout_width="wrap_content" android:layout_height="300dp" android:adjustViewBounds="true" android:elevation="4dp" android:outlineProvider="bounds" android:src="@drawable/nolongerhuman" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.3" /> </ConstraintLayout>
9. @mikescamell Scene 1 - Part 1
10. @mikescamell dependencies { implementation ‘com.android.support.constraint:constraint-layout:2.0.0-alpha4' } Scene 1 - Part 2
11. @mikescamell Scene 1 - Part 2 <ConstraintLayout android:layout_width="match_parent" android:layout_height="match_parent"> <ImageView android:id="@+id/bookCover" android:layout_width="wrap_content" android:layout_height="300dp" android:adjustViewBounds="true" android:elevation="4dp" android:outlineProvider="bounds" android:src="@drawable/nolongerhuman" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.3" /> </ConstraintLayout>
12. @mikescamell Scene 1 - Part 2 <MotionLayout android:layout_width="match_parent" android:layout_height="match_parent"> <ImageView android:id="@+id/bookCover" android:layout_width="wrap_content" android:layout_height="300dp" android:adjustViewBounds="true" android:elevation="4dp" android:outlineProvider="bounds" android:src="@drawable/nolongerhuman" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.3" /> </MotionLayout>
13. @mikescamell 2019-03-20 19:45:26.529 28239-28239/? E/MotionLayout: WARNING NO app:layoutDescription tag 2019-03-20 19:45:26.683 28239-28239/? E/AndroidRuntime: FATAL EXCEPTION: main Process: com.mikescamell.locomotionlayout, PID: 28239 java.lang.NullPointerException: Attempt to invoke virtual method 'int androidx.constraintlayout.motion.widget.MotionScene.getDuration()' on a null object reference Scene 1 - Part 2
14. @mikescamell Scene 1 - Part 2
15. @mikescamell Scene 1 - Part 2 <MotionScene> </MotionScene>
16. @mikescamell Scene 1 - Part 2 <MotionScene> <Transition android:id="@+id/startToEnd" app:constraintSetStart="@+id/start" app:constraintSetEnd="@+id/end"> </Transition> </MotionScene>
17. @mikescamell <MotionScene> <Transition android:id="@+id/startToEnd" app:constraintSetStart="@+id/start" app:constraintSetEnd="@+id/end"> <OnSwipe app:dragDirection="dragDown" app:touchAnchorId="@id/bookCover" app:touchAnchorSide="bottom" /> </Transition> </MotionScene> Scene 1 - Part 2
18. @mikescamell Scene 1 - Part 2
19. @mikescamell Scene 1 - Part 2 <MotionScene> <Transition android:id="@+id/startToEnd" app:constraintSetStart="@+id/start" app:constraintSetEnd="@+id/end"> <OnSwipe app:dragDirection="dragDown" app:touchAnchorId="@id/bookCover" app:touchAnchorSide="bottom" /> </Transition> </MotionScene>
20. @mikescamell <MotionScene> ... </MotionScene> Scene 1 - Part 2
21. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/start"> </ConstraintSet> </MotionScene> Scene 1 - Part 2
22. @mikescamell Scene 1 - Part 2 <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookCover"> <Layout app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.3" app:layout_height="300dp" app:layout_width="wrap_content" /> <Transform android:rotationX="0" android:translationY=“0dp" /> </Constraint> </ConstraintSet> … </MotionScene>
23. @mikescamell Scene 1 - Part 2 <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookCover"> <Layout app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.3" app:layout_height="300dp" app:layout_width="wrap_content" /> <Transform android:rotationX="0" android:translationY=“0dp" /> </Constraint> </ConstraintSet> </MotionScene>
24. @mikescamell Scene 1 - Part 2 <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookCover"> <Layout app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.3" app:layout_height="300dp" app:layout_width="wrap_content" /> <Transform android:rotationX="0" android:translationY=“0dp" /> </Constraint> </ConstraintSet> </MotionScene>
25. @mikescamell Scene 1 - Part 2 <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookCover"> <Layout app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.3" app:layout_height="300dp" app:layout_width="wrap_content" /> <Transform android:rotationX="0" android:translationY=“0dp" /> </Constraint> </ConstraintSet> </MotionScene>
26. @mikescamell Scene 1 - Part 2 <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookCover"> <Transform android:rotationX="0" android:translationY=“0dp" /> </Constraint> </ConstraintSet> </MotionScene>
27. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/end"> <Constraint android:id="@+id/bookCover"> <Layout app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf=“parent" app:layout_height="wrap_content" app:layout_width="150dp" /> <Transform android:rotationX=“-55"> </Constraint> </ConstraintSet> </MotionScene> Scene 1 - Part 2
28. @mikescamell Scene 1 - Part 2
29. @mikescamell Scene 1 - Part 3
30. @mikescamell Scene 1 - Part 3 <MotionLayout android:layout_width="match_parent" android:layout_height="match_parent" app:layoutDescription="@xml/scene1_part3"> <ImageView android:id="@+id/bookCover" android:layout_width="wrap_content" android:layout_height="300dp" android:adjustViewBounds="true" android:contentDescription="@string/bookcover" android:elevation="4dp" android:src="@drawable/nolongerhuman" /> </MotionLayout>
31. @mikescamell <MotionLayout android:layout_width="match_parent" android:layout_height="match_parent" app:layoutDescription="@xml/scene1_part3"> <MaterialCardView android:id="@+id/bookSynopsisCard" android:layout_width="140dp" android:layout_height="140dp" app:cardBackgroundColor="@color/crazyPink" app:cardCornerRadius=“16dp" /> <ImageView ... /> </MotionLayout> Scene 1 - Part 3
32. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.35" app:layout_height="140dp" app:layout_width="140dp" /> <Transform android:rotationX="-55" /> </Constraint> ... </ConstraintSet> ... </MotionScene> Scene 1 - Part 3
33. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.35" app:layout_height="140dp" app:layout_width="140dp" /> <Transform android:rotationX=“-55" /> </Constraint> ... </ConstraintSet> ... </MotionScene> Scene 1 - Part 3
34. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.35" app:layout_height="140dp" app:layout_width="140dp" /> <Transform android:rotationX=“-55" /> </Constraint> ... </ConstraintSet> ... </MotionScene> Scene 1 - Part 3
35. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/end"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.3" app:layout_height="300dp" app:layout_width="300dp" /> <Transform android:rotationX=“0" /> </Constraint> ... </ConstraintSet> </MotionScene> Scene 1 - Part 3
36. @mikescamell Scene 1 - Part 3 <MotionScene> ... <ConstraintSet android:id="@+id/end"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.3" app:layout_height="300dp" app:layout_width="300dp" /> <Transform android:rotationX=“0" /> </Constraint> ... </ConstraintSet> </MotionScene>
37. @mikescamell Scene 1 - Part 3 <MotionScene> ... <ConstraintSet android:id="@+id/end"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.3" app:layout_height="300dp" app:layout_width="300dp" /> <Transform android:rotationX=“0" /> </Constraint> ... </ConstraintSet> </MotionScene>
38. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/end"> <Constraint android:id="@+id/bookCover"> <Layout app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/bookSynopsisCard" app:layout_height="wrap_content" app:layout_width="150dp" /> <Transform android:rotationX="-55" android:translationY=“-24dp" /> </Constraint> </ConstraintSet> </MotionScene> Scene 1 - Part 3
39. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/end"> <Constraint android:id="@+id/bookCover"> <Layout app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/bookSynopsisCard" app:layout_height="wrap_content" app:layout_width="150dp" /> <Transform android:rotationX="-55" android:translationY=“-24dp" /> </Constraint> </ConstraintSet> </MotionScene> Scene 1 - Part 3
40. @mikescamell Scene 1 - Part 3
41. @mikescamell Scene 1 - Part 3
42. @mikescamell Scene 1 - Part 4
43. @mikescamell Scene 1 - Part 4
44. @mikescamell Scene 1 - Part 5
45. @mikescamell Scene 1 - Part 6
46. @mikescamell Scene 1 - Part 6 • KeyAttribute • KeyPosition • KeyCycle • KeyTimeCycle • KeyTrigger KeyFrames
47. @mikescamell <MotionScene> <Transition ...> <KeyFrameSet> <KeyAttribute android:alpha="0" app:framePosition="70" app:motionTarget="@id/bookSynopsisTitle" /> <KeyAttribute android:alpha="0" app:framePosition="70" app:motionTarget="@id/bookSynopsisText" /> </KeyFrameSet> </Transition> ... </MotionScene> Scene 1 - Part 6
48. @mikescamell Scene 1 - Part 6 0% 100% 70% Synopsis
49. @mikescamell Scene 1 - Part 6
50. @mikescamell Scene 1 - Part 7 Liquidy background Liquidy background
51. @mikescamell Scene 1 - Part 7 End Start
52. @mikescamell Scene 1 - Part 7 shapeshifter.design
53. @mikescamell topLeftAnimationForward ?.registerAnimationCallback(object : Animatable2Compat.AnimationCallback() { override fun onAnimationEnd(drawable: Drawable?) { topLeftImageView.setImageDrawable(topLeftAnimationReverse) topLeftAnimationReverse ?.start() } }) Scene 1 - Part 7 topLeftAnimationReverse ?.registerAnimationCallback(object : Animatable2Compat.AnimationCallback() { override fun onAnimationEnd(drawable: Drawable?) { topLeftImageView.setImageDrawable(topLeftAnimationForward) topLeftAnimationForward ?.start() } })
54. @mikescamell Scene 1 - Part 7
55. @mikescamell Scene 2 - Part 1
56. @mikescamell Scene 2 - Part 1
57. @mikescamell Scene 2 - Part 1
58. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.3" app:layout_height="300dp" app:layout_width="300dp" /> <Transform android:elevation="4dp" /> </Constraint> </ConstraintSet> ... </MotionScene> Scene 2 - Part 1
59. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/end"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout app:layout_constraintDimensionRatio="16:9" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_height="0dp" app:layout_width="0dp" /> <Transform android:elevation=“8dp" /> </Constraint> </ConstraintSet> </MotionScene> Scene 2 - Part 1
60. @mikescamell <MotionScene> <Transition android:id="@+id/startToEnd" app:constraintSetEnd="@+id/end" app:constraintSetStart="@+id/start" >a </Transition> ... </MotionScene> Scene 2 - Part 1
61. @mikescamell Scene 2 - Part 1 <MotionScene> <Transition android:id="@+id/startToEnd" app:constraintSetEnd="@+id/end" app:constraintSetStart=“@+id/start” app:duration=“1000" >a <OnClick app:clickAction="toggle" app:targetId=“@id/bookSynopsisCard" /> </Transition> ... </MotionScene>
62. @mikescamell Scene 2 - Part 1 <OnClick app:clickAction=“jumpToStart|transitionToEnd” />
63. @mikescamell Scene 2 - Part 1 <MotionScene> <Transition android:id="@+id/startToEnd" app:constraintSetEnd="@+id/end" app:constraintSetStart=“@+id/start” app:duration=“1000" > <OnClick app:clickAction="toggle" app:targetId=“@id/bookSynopsisCard" /> </Transition> ... </MotionScene>
64. @mikescamell Scene 2 - Part 1 <MotionScene> <Transition android:id="@+id/startToEnd" app:constraintSetEnd="@+id/end" app:constraintSetStart=“@+id/start” app:duration=“1000" > <OnClick app:clickAction="toggle" app:targetId=“@id/bookSynopsisCard" /> </Transition> ... </MotionScene>
65. @mikescamell Scene 2 - Part 1 <MotionScene> <Transition android:id="@+id/startToEnd" app:constraintSetEnd="@+id/end" app:constraintSetStart=“@+id/start” app:duration=“1000" > <OnClick app:clickAction="toggle" app:targetId=“@id/bookSynopsisCard" /> </Transition> ... </MotionScene>
66. @mikescamell Scene 2 - Part 1
67. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/end"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout app:layout_constraintDimensionRatio="16:9" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_height="0dp" app:layout_width="0dp" /> <Transform android:elevation=“8dp" /> </Constraint> </ConstraintSet> </MotionScene> Scene 2 - Part 1
68. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/end"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout app:layout_constraintDimensionRatio="16:9" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_height="0dp" app:layout_width="0dp" /> <CustomAttribute app:attributeName="radius" app:customDimension="0dp" /> <Transform android:elevation=“8dp" /> </Constraint> </ConstraintSet> </MotionScene> Scene 2 - Part 1
69. @mikescamell • Color • Integer • Float • String • Dimension • Boolean • Pixel (new in alpha4) CustomAttribute Scene 2 - Part 1
70. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout… /> <Transform android:elevation=“4dp" /> </Constraint> </ConstraintSet> ... </MotionScene> Scene 2 - Part 1
71. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout… /> <CustomAttribute app:attributeName="radius" app:customDimension="16dp" /> <Transform android:elevation=“4dp" /> </Constraint> </ConstraintSet> ... </MotionScene> Scene 2 - Part 1
72. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/end"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout ... /> <Transform android:elevation=“8dp" /> </Constraint> </ConstraintSet> </MotionScene> Scene 2 - Part 1
73. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/end"> <Constraint android:id="@+id/bookSynopsisCard"> <Layout ... /> <CustomAttribute app:attributeName="radius" app:customDimension="0dp" /> <Transform android:elevation=“8dp" /> </Constraint> </ConstraintSet> </MotionScene> Scene 2 - Part 1
74. @mikescamell Scene 2 - Part 1
75. @mikescamell Scene 2 - Part 2
76. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookCover"> <Layout app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@id/bookSynopsisCard" app:layout_width="150dp" /> <Transform android:rotationX="-55" android:translationY=“-24dp" /> </Constraint> </ConstraintSet> ... </MotionScene> Scene 2 - Part 2
77. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookCover"> <Layout app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@id/bookSynopsisCard" app:layout_width="150dp" /> <Transform android:elevation="4dp" android:rotationX="-55" android:translationY=“-24dp" /> </Constraint> </ConstraintSet> ... </MotionScene> Scene 2 - Part 2
78. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookCover"> <Layout ... /> <Transform ... /> </Constraint> </ConstraintSet> ... </MotionScene> Scene 2 - Part 2
79. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/start"> <Constraint android:id="@+id/bookCover"> <Layout ... /> <Transform ... /> <CustomAttribute app:attributeName="outlineSpotShadowColor" app:customColorValue="@color/transparent" /> </Constraint> </ConstraintSet> ... </MotionScene> Scene 2 - Part 2
80. @mikescamell Scene 2 - Part 2 <MotionScene> ... <ConstraintSet android:id=“@+id/end"> <Constraint android:id="@+id/bookCover"> <Layout ... /> <Transform android:elevation="12dp" android:rotationX="0" android:translationY=“24dp" /> <CustomAttribute app:attributeName="outlineSpotShadowColor" app:customColorValue=“@color/black" /> </Constraint> </ConstraintSet> ... </MotionScene>
81. @mikescamell Scene 2 - Part 2 <MotionScene> ... <ConstraintSet android:id=“@+id/end"> <Constraint android:id="@+id/bookCover"> <Layout ... /> <Transform android:elevation="12dp" android:rotationX="0" android:translationY=“24dp" /> <CustomAttribute app:attributeName="outlineSpotShadowColor" app:customColorValue=“@color/black" /> </Constraint> </ConstraintSet> ... </MotionScene>
82. @mikescamell Scene 2 - Part 2 <MotionScene> ... <ConstraintSet android:id=“@+id/end"> <Constraint android:id="@+id/bookCover"> <Layout ... /> <Transform android:elevation="12dp" android:rotationX="0" android:translationY=“24dp" /> <CustomAttribute app:attributeName="outlineSpotShadowColor" app:customColorValue=“@color/black" /> </Constraint> </ConstraintSet> ... </MotionScene>
83. @mikescamell Scene 2 - Part 2
84. @mikescamell Scene 2 - Part 3
85. @mikescamell KEYATTRIBUTES Scene 2 - Part 3
86. @mikescamell <MotionScene> <Transition ...> <OnClick ... /> </Transition> ... </MotionScene> Scene 2 - Part 3
87. @mikescamell <MotionScene> <Transition ...> <OnClick ... /> <KeyFrameSet> <KeyAttribute android:alpha="0" app:framePosition="10" app:motionTarget="@id/bookSynopsisTitle" /> <KeyAttribute android:alpha="0" app:framePosition="10" app:motionTarget="@id/bookSynopsisText" /> </KeyFrameSet> </Transition> ... </MotionScene> Scene 2 - Part 3
88. @mikescamell <MotionScene> <ConstraintSet android:id="@+id/start"> ... <Constraint android:id="@+id/bookSynopsisTitle"> <Transform android:elevation=“4dp" /> <PropertySet app:alpha="1" /> </Constraint> <Constraint android:id="@+id/bookSynopsisText"> <Transform android:elevation="4dp" /> <PropertySet app:alpha="1" /> </Constraint> ... </ConstraintSet> ... </MotionScene> Scene 2 - Part 3
89. @mikescamell <MotionScene> ... <ConstraintSet android:id="@+id/end"> <Constraint android:id="@+id/bookSynopsisTitle"> <Transform android:elevation="8dp" /> <PropertySet app:alpha="0" /> </Constraint> <Constraint android:id="@+id/bookSynopsisText"> <Transform android:elevation=“8dp" /> <PropertySet app:alpha="0" /> </Constraint> ... </ConstraintSet> </MotionScene> Scene 2 - Part 3
90. @mikescamell Scene 2 - Part 3
91. @mikescamell Scene 2 - Part 4
92. @mikescamell Scene 2 - Part 4 <MotionLayout android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:id="@+id/bookType" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginStart="32dp" android:layout_marginEnd="16dp" android:elevation="8dp" android:fontFamily="@font/lora_italic" android:text="@string/novel" android:textSize="12sp" android:translationY="24dp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toEndOf="@id/bookCover" app:layout_constraintTop_toTopOf="@+id/bookCover" /> </MotionLayout>
93. @mikescamell Scene 2 - Part 4 <MotionLayout android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:id="@+id/bookType" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginStart="32dp" android:layout_marginEnd="16dp" android:elevation="8dp" android:fontFamily="@font/lora_italic" android:text="@string/novel" android:textSize="12sp" android:translationY="24dp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toEndOf="@id/bookCover" app:layout_constraintTop_toTopOf="@+id/bookCover" /> </MotionLayout>
94. @mikescamell <MotionScene> <Transition ...> <OnClick ... /> <KeyFrameSet> <KeyAttribute android:alpha="0" app:framePosition="95" app:motionTarget="@id/bookType" /> ... </KeyFrameSet> </Transition> ... </MotionScene> Scene 2 - Part 4
95. @mikescamell <MotionScene> <Transition ...> <OnClick ... /> <KeyFrameSet> <KeyAttribute android:alpha="0" app:framePosition="95" app:motionTarget="@id/bookType" /> ... </KeyFrameSet> </Transition> ... </MotionScene> Scene 2 - Part 4
96. @mikescamell Scene 2 - Part 4
97. @mikescamell motionLayout.setTransitionListener(object : MotionLayout.TransitionListener { override fun onTransitionTrigger( motionLayout: MotionLayout, startId: Int, endId: Boolean, progress: Float ) { } override fun onTransitionStarted( motionLayout: MotionLayout, startId: Int, endId: Int ) { } override fun onTransitionChange( motionLayout: MotionLayout, startId: Int, endId: Int, progress: Float ) {g }x override fun onTransitionCompleted(motionLayout: MotionLayout, currentId: Int) { } }) Scene 2 - Part 4
98. @mikescamell motionLayout.setTransitionListener(object : MotionLayout.TransitionListener { ... override fun onTransitionChange( motionLayout: MotionLayout, startId: Int, endId: Int, progress: Float ) {g }x ... }) Scene 2 - Part 4
99. @mikescamell motionLayout.setTransitionListener(object : MotionLayout.TransitionListener { ... override fun onTransitionChange( motionLayout: MotionLayout, startId: Int, endId: Int, progress: Float ) {g val color = ColorUtils.setAlphaComponent(Color.WHITE, calculateProgressAlpha(progress)) bottomRightAnimationForward ?.setColorFilter(color, PorterDuff.Mode.SRC_ATOP) bottomRightAnimationReverse ?.setColorFilter(color, PorterDuff.Mode.SRC_ATOP) }x ... }) Scene 2 - Part 4
100. @mikescamell Scene 2 - Part 4
101. @mikescamell Scene 2 - Part 5
102. @mikescamell <ConstraintSet android:id="@+id/start"> ... <Constraint android:id="@+id/favourite"> <PropertySet app:alpha="0" /> </Constraint> <Constraint android:id="@+id/bookmark"> <PropertySet app:alpha="0" /> </Constraint> <Constraint android:id="@+id/readButton"> <PropertySet app:alpha="0" /> </Constraint> </ConstraintSet> Scene 2 - Part 5
103. @mikescamell <MotionScene> <Transition ...> <OnClick ... /> <KeyFrameSet> ... <KeyAttribute android:alpha="0" app:framePosition="80" app:motionTarget="@id/favourite" /> <KeyAttribute android:alpha="0" app:framePosition="85" app:motionTarget="@id/bookmark" /> <KeyAttribute android:alpha="0" app:framePosition="90" app:motionTarget="@id/readButton" /> </KeyFrameSet> </Transition> </MotionScene> Scene 2 - Part 5
104. @mikescamell <MotionScene> <Transition ...> <OnClick ... /> <KeyFrameSet> ... <KeyAttribute android:alpha="0" app:framePosition="80" app:motionTarget="@id/favourite" /> <KeyAttribute android:alpha="0" app:framePosition="85" app:motionTarget="@id/bookmark" /> <KeyAttribute android:alpha="0" app:framePosition="90" app:motionTarget="@id/readButton" /> </KeyFrameSet> </Transition> </MotionScene> Scene 2 - Part 5
105. @mikescamell <MotionScene> <Transition ...> <OnClick ... /> <KeyFrameSet> ... <KeyAttribute android:alpha="0" app:framePosition="80" app:motionTarget="@id/favourite" /> <KeyAttribute android:alpha="0" app:framePosition="85" app:motionTarget="@id/bookmark" /> <KeyAttribute android:alpha="0" app:framePosition="90" app:motionTarget="@id/readButton" /> </KeyFrameSet> </Transition> </MotionScene> Scene 2 - Part 5
106. @mikescamell Scene 2 - Part 5
107. @mikescamell Scene 2 - Part 5
108. @mikescamell Scene 2 - Part 6
109. @mikescamell <MotionLayout android:id="@+id/root" android:layout_width="match_parent" android:layout_height="match_parent" app:motionDebug="SHOW_PATH" app:layoutDescription="@xml/scene2_part5"> Scene 2 - Part 6
110. @mikescamell <MotionLayout android:id="@+id/root" android:layout_width="match_parent" android:layout_height="match_parent" app:motionDebug="SHOW_PROGRESS" app:layoutDescription="@xml/scene2_part5"> Scene 2 - Part 6
111. @mikescamell Scene 2 - Part 6 <KeyPosition />
112. @mikescamell Scene 2 - Part 6 <KeyPosition app:curveFit="linear" />
113. @mikescamell Scene 2 - Part 6 <KeyPosition app:curveFit="linear" app:framePosition="0" />
114. @mikescamell Scene 2 - Part 6 <KeyPosition app:curveFit="linear" app:framePosition="0" app:keyPositionType="deltaRelative" app:percentX="1" />
115. @mikescamell Scene 2 - Part 6 Start Position End Position X Y 1.0 1.0 Delta Relative
116. @mikescamell Scene 2 - Part 6 X Y 1.0 1.0 End Position Start Position Parent Relative
117. @mikescamell Scene 2 - Part 6 X Y 1.0 1.0 End Position Start Position Path Relative
118. @mikescamell Scene 2 - Part 6 Start Position End Position X Y 1.0 1.0 Delta Relative
119. @mikescamell Scene 2 - Part 6 Start Position End Position X Y 1.0 1.0 2.0 Delta Relative
120. @mikescamell Scene 2 - Part 6 <KeyPosition app:curveFit="linear" app:framePosition="0" app:keyPositionType="deltaRelative" app:percentX="1" />
121. @mikescamell Scene 2 - Part 6 <KeyPosition app:curveFit="linear" app:framePosition="0" app:keyPositionType="deltaRelative" app:percentX="1" app:target="@+id/favourite" />
122. @mikescamell Scene 2 - Part 6 <KeyPosition app:curveFit="linear" app:framePosition="0" app:keyPositionType="deltaRelative" app:percentX="1" app:target="@+id/favourite" app:transitionEasing="decelerate" />
123. @mikescamell Scene 2 - Part 6
124. @mikescamell <MotionScene> <Transition ...> <KeyFrameSet> <KeyAttribute android:alpha="0" android:translationY="24dp" app:framePosition="80" app:motionTarget="@id/favourite" /> ... </KeyFrameSet> </Transition> ... </MotionScene> Scene 2 - Part 6
125. @mikescamell Scene 2 - Part 6
126. @mikescamell Scene 2 - Part 7
127. @mikescamell Scene 2 - Part 7 <MotionScene> <ConstraintSet android:id="@+id/start"> ... <Constraint android:id="@+id/bookDetailScrollView"> <PropertySet app:alpha="0" /> <Layout app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="parent" /> </Constraint> </ConstraintSet> ... </MotionScene>
128. @mikescamell Scene 2 - Part 7 <MotionScene> ... <ConstraintSet android:id="@+id/end"> ... <Constraint android:id="@+id/bookDetailScrollView"> <PropertySet app:alpha="1" /> <Layout app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf=“@id/bookCover“ /> </Constraint> </ConstraintSet> </MotionScene>
129. @mikescamell <MotionScene> <Transition ...> <KeyFrameSet> <KeyAttribute android:alpha="0" app:framePosition="50" app:motionTarget="@id/bookDetailScrollView" /> ... </KeyFrameSet> </Transition> ... </MotionScene> Scene 2 - Part 7
130. @mikescamell Scene 2 - Part 7
131. @mikescamell <MotionScene> <Transitionk android:id="@+id/startToMiddle"k app:constraintSetEnd="@+id/middle"k app:constraintSetStart="@+id/start"k app:duration="1000">k <OnClickk app:clickAction="toggle"k app:targetId="@id/bookCover" />k <KeyFrameSet ...k />k </Transition>k ...l <ConstraintSet android:id="@+id/start" ... /> <ConstraintSet android:id="@+id/middle" ... /> <ConstraintSet android:id=“@+id/end" ... /> </MotionScene> Combined Scene - Part 1,2,3
132. @mikescamell <MotionScene> ... <Transition android:id="@+id/middleToEnd" app:constraintSetEnd="@+id/end" app:constraintSetStart="@+id/middle" app:duration="1000"> <OnClick app:clickAction="toggle" app:targetId="@id/bookSynopsisCard" /> <KeyFrameSet ... /> </Transition> <ConstraintSet android:id="@+id/start" ... /> <ConstraintSet android:id="@+id/middle" ... /> <ConstraintSet android:id=“@+id/end" ... /> </MotionScene> Combined Scene - Part 1,2,3
133. @mikescamell Considerations • No GUI (in progress) • Doesn’t work with RecyclerViews (coming soon) • It’s in alpha! • Performance? • Elevation shadow tweaking is only 28+ • Difficult to have multiple transitions using same target
134. @mikescamell
135. @mikescamell Considerations • No GUI (in progress) • Doesn’t work with RecyclerViews (coming soon) • It’s in alpha! • Performance? • Elevation shadow tweaking is only 28+ • Difficult to have multiple transitions using same target
136. @mikescamell Summary • Start out simple • Use an empty project • Read the blog posts & ask questions! #motionlayout • Take advantage of Apply Changes • HAVE FUN!
137. @mikescamell THANK YOU! Want to read the latest blog posts from Android Developers around the world? Checkout: androiddev.io (please it’s costing me $5 a month) Twitter: @mikescamell Website: mikescamell.com Podcast (on hiatus): androidsnacks.com (Skip to the “funny” bits at the end) Slides: http:/ /bit.ly/loco-motionlayout
138. @mikescamell Links • Loco-MotionLayout Repo - https:/ /github.com/mikescamell/Loco-MotionLayout (checkout the alpha4_fixed branch) • Nicolas Roard’s MotionLayout Series: - https:/ /medium.com/google-developers/introduction-to-motionlayout-part-i-29208674b10d - https:/ /medium.com/google-developers/introduction-to-motionlayout-part-ii-a31acc084f59 - https:/ /medium.com/google-developers/introduction-to-motionlayout-part-iii-47cd64d51a5 - https:/ /medium.com/google-developers/defining-motion-paths-in-motionlayout-6095b874d37 • Google Constraint/MotionLayout Example Repo - https:/ /github.com/googlesamples/android-ConstraintLayoutExamples
139. @mikescamell Links • MotionLayout Sunday ™ (where the idea for this talk originated): - https:/ /twitter.com/MikeScamell/status/1071810532888457217 - https:/ /twitter.com/MikeScamell/status/1074342193102495746 - https:/ /twitter.com/MikeScamell/status/1076790689659322368 - https:/ /twitter.com/MikeScamell/status/1079508256857436160 - https:/ /twitter.com/MikeScamell/status/1082037771362029574 • ShapeShifter (Creating AnimatedVectorDrawables) - https:/ /shapeshifter.design/ • PorterDuff.Mode - https:/ /developer.android.com/reference/android/graphics/PorterDuff.Mode