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Constraint Layout Constraint Layout 1

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Constraint Layout Constraint Layout 2

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Constraint Layout Constraint Layout RelativeLayout supercharged to the next level 2

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Constraint Layout Constraint Layout RelativeLayout supercharged to the next level Apply constraints with respect to each other 2

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Constraint Layout Constraint Layout RelativeLayout supercharged to the next level Apply constraints with respect to each other Helper views such as Barriers, Groups 2

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Constraint Layout Constraint Layout RelativeLayout supercharged to the next level Apply constraints with respect to each other Helper views such as Barriers, Groups Animation Support 2

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Constraint Layout Constraint Layout RelativeLayout supercharged to the next level Apply constraints with respect to each other Helper views such as Barriers, Groups Animation Support Keep a flat hierarchy of views 2

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Constraints Constraints 3

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Position Constraint Position Constraint 4

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Position Constraint Position Constraint layout_constraintXXX_toXXXof 4

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Position Constraint Position Constraint layout_constraintXXX_toXXXof Horizontal: Left, Right, Start, End 4

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Position Constraint Position Constraint layout_constraintXXX_toXXXof Horizontal: Left, Right, Start, End Vertical: Top, Bottom, Baseline 4

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Position Constraint Position Constraint layout_constraintXXX_toXXXof Horizontal: Left, Right, Start, End Vertical: Top, Bottom, Baseline w.r.t `parent` or another view 4

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Position Constraint Position Constraint 5

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Position Constraint Position Constraint 5

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Position Constraint Position Constraint app:layout_constraintLeft_toLeftOf="parent" 5

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Position Constraint Position Constraint app:layout_constraintLeft_toLeftOf="parent" 5

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Position Constraint Position Constraint 6

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Position Constraint Position Constraint 6

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Position Constraint Position Constraint app:layout_constraintRight_toRightOf="parent" 6

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Position Constraint Position Constraint app:layout_constraintRight_toRightOf="parent" 6

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Position Constraint Position Constraint 7

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Position Constraint Position Constraint 7

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Position Constraint Position Constraint 7

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Position Constraint Position Constraint A B 7

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Position Constraint Position Constraint A B 7

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Position Constraint Position Constraint 8

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Position Constraint Position Constraint 8

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Position Constraint Position Constraint 8

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Position Constraint Position Constraint A 8

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Position Constraint Position Constraint A 8

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Position Constraint Position Constraint A Left margin not respected 8

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Dimension Constraint Dimension Constraint 9

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Dimension Constraint Dimension Constraint 9

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Dimension Constraint Dimension Constraint 9

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Dimension Constraint Dimension Constraint A 9

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Dimension Constraint Dimension Constraint 10

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Dimension Constraint Dimension Constraint 10

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Dimension Constraint Dimension Constraint 10

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Dimension Constraint Dimension Constraint A 10

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Dimension Constraint Dimension Constraint 11

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Dimension Constraint Dimension Constraint 11

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Dimension Constraint Dimension Constraint 11

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Dimension Constraint Dimension Constraint A 11

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Centre Positioning Centre Positioning 12

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Centre Positioning Centre Positioning 12

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Centre Positioning Centre Positioning android:layout_width="wrap_content" android:layout_height="wrap_content" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" 12

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Centre Positioning Centre Positioning android:layout_width="wrap_content" android:layout_height="wrap_content" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" 0.5 12

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Positioning - Bias Positioning - Bias 13

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Positioning - Bias Positioning - Bias 13

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Positioning - Bias Positioning - Bias android:layout_width="wrap_content" android:layout_height="wrap_content" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintVertical_bias="0.3" 13

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Positioning - Bias Positioning - Bias android:layout_width="wrap_content" android:layout_height="wrap_content" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintVertical_bias="0.3" 0.3 13

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Positioning - Bias Positioning - Bias android:layout_width="wrap_content" android:layout_height="wrap_content" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintVertical_bias="0.3" 0.3 13

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Percent Dimension Percent Dimension 14

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Percent Dimension Percent Dimension 14

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Percent Dimension Percent Dimension android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" 14

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Percent Dimension Percent Dimension android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" android:layout_width="0dp" android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" 14

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Percent Dimension Percent Dimension android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" android:layout_width="0dp" android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" android:layout_width="0dp" android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintWidth_percent="0.5" 14

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Percent Dimension Percent Dimension android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" android:layout_width="0dp" android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" android:layout_width="0dp" android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintWidth_percent="0.5" 14

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Max and Min Size Max and Min Size 15

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Max and Min Size Max and Min Size 15

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Max and Min Size Max and Min Size android:layout_width="0dp" android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintWidth_max="150dp" 15

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Max and Min Size Max and Min Size android:layout_width="0dp" android:layout_height="0dp" app:layout_constraintTop_toTopOf="parent" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintWidth_max="150dp" 15

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Trick with constraints Trick with constraints 16

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Trick with constraints Trick with constraints 16

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Trick with constraints Trick with constraints 16

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Trick with constraints Trick with constraints 16

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Trick with constraints Trick with constraints 16

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Visiblity Constraint Visiblity Constraint 17

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Visiblity Constraint Visiblity Constraint 17

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Visiblity Constraint Visiblity Constraint A B 17

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Visiblity Constraint Visiblity Constraint A B B 17

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Visiblity Constraint Visiblity Constraint A B B B 17

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Chains Chains 18

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Chains Chains Group views 18

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Chains Chains Group views Bi-directional constraints 18

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Chains Chains Group views Bi-directional constraints A B Chain 18

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Chains Chains Group views Bi-directional constraints Chain head A B Chain 18

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Chain Styles Chain Styles 19

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Chain Styles Chain Styles Spread 19

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Chain Styles Chain Styles Spread Spread Inside 19

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Chain Styles Chain Styles Spread Spread Inside Weighted 19

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Chain Styles Chain Styles Spread Spread Inside Weighted Packed 19

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Barrier Barrier 20

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Barrier Barrier A wonderful example Another example Example 20

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Barrier Barrier A wonderful example Another example Example Barrier 20

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Barrier Barrier A wonderful example Another example Example Barrier 20

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Guideline Guideline 21

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Guideline Guideline Just a vertical or horizontal line 21

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Guideline Guideline Just a vertical or horizontal line Marked as Gone so not really shown to the user 21

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Guideline Guideline Just a vertical or horizontal line Marked as Gone so not really shown to the user Acts as a helper to place views 21

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Guideline Guideline Just a vertical or horizontal line Marked as Gone so not really shown to the user Acts as a helper to place views Can be in percent or fixed value 21

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Guideline Guideline Just a vertical or horizontal line Marked as Gone so not really shown to the user Acts as a helper to place views Can be in percent or fixed value 21

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Group Group 22

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Group Group Group views together 22

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Group Group Group views together Control their visibility 22

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Group Group Group views together Control their visibility Views can belong to more than one group 22

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Group Group Group views together Control their visibility Views can belong to more than one group Last one in XML order wins 22

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Group Group Group views together Control their visibility Views can belong to more than one group Last one in XML order wins 22

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Layout Editor Demo Layout Editor Demo 23

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Constraint Set Constraint Set 24

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Constraint Set Constraint Set Defines the set of constraints applied to views 24

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Constraint Set Constraint Set Defines the set of constraints applied to views Can be applied to a ConstraintLayout 24

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Constraint Set Constraint Set Defines the set of constraints applied to views Can be applied to a ConstraintLayout Can be used to create animations 24

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Constraint Set Constraint Set 25

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Constraint Set Constraint Set 25

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Constraint Set Constraint Set 25

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Constraint Set Constraint Set override fun onCreate(savedInstanceState: Bundle?) { ... val constraintSet1 = ConstraintSet() constraintSet1.clone(constraintLayout) val constraintSet2 = ConstraintSet() constraintSet2.clone(this, R.layout.activity_main_alt) var changed = false findViewById(R.id.button).setOnClickListener { TransitionManager.beginDelayedTransition(constraintLayout) val constraint = if (changed) constraintSet1 else constraintSet2 constraint.applyTo(constraintLayout) changed = !changed } } 25

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Constraint Set Constraint Set override fun onCreate(savedInstanceState: Bundle?) { ... val constraintSet1 = ConstraintSet() constraintSet1.clone(constraintLayout) val constraintSet2 = ConstraintSet() constraintSet2.clone(this, R.layout.activity_main_alt) var changed = false findViewById(R.id.button).setOnClickListener { TransitionManager.beginDelayedTransition(constraintLayout) val constraint = if (changed) constraintSet1 else constraintSet2 constraint.applyTo(constraintLayout) changed = !changed } } 25

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Constraint Set - Duplicate Constraint Set - Duplicate XML? XML? 26

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Constraint Set - Duplicate Constraint Set - Duplicate XML? XML? Omit non styling attributes from transition XML 26

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Constraint Set - Duplicate Constraint Set - Duplicate XML? XML? Omit non styling attributes from transition XML Constraint set works on constraints and not styles 26

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Constraint Set - Duplicate Constraint Set - Duplicate XML? XML? Omit non styling attributes from transition XML Constraint set works on constraints and not styles Create constraint set in code 26

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Codelab Codelab https://codelabs.developers.google.com/c odelabs/constraint-layout/index.html 27

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Constraint Set CodeLab Constraint Set CodeLab 28