MVVM shared state with animated viewsHow to save an Android Activity state using save instance state?What is the difference between MVC and MVVM?Override back button to act like home buttonPrevent ViewPager from destroying off-screen viewsWhat is the difference between FragmentPagerAdapter and FragmentStatePagerAdapter?Dilemma: when to use Fragments vs Activities:MVVM notify View about loading stateShared element transition - animate only the visible part of the shared viewAdding Animation to State Changes with LiveDataObserving LiveData instance from View
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MVVM shared state with animated views
How to save an Android Activity state using save instance state?What is the difference between MVC and MVVM?Override back button to act like home buttonPrevent ViewPager from destroying off-screen viewsWhat is the difference between FragmentPagerAdapter and FragmentStatePagerAdapter?Dilemma: when to use Fragments vs Activities:MVVM notify View about loading stateShared element transition - animate only the visible part of the shared viewAdding Animation to State Changes with LiveDataObserving LiveData instance from View
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Assuming I have 2 fragments A and B. Each of them contains a view respectively viewA and viewB. Both views are hidden by default.
There is a shared view model called sharedVM (linked to the activity)
An event A from the user will show viewA with animation and hide viewB with animation (if viewB is visible)
An event B from the user will show viewB with animation and hide viewA with animation (if viewA is visible)
I though about:
Solution 1:
Use a LiveData state inside sharedVM to know if views are hidden or visible.
But then when the fragment is destroyed and recreated:
The hide/show animation will play again, that's not good.
Solution 2:
Use LiveDataEvent inside sharedVM to know dispatch and trigger the animations.
But then when the fragment is destroyed and recreated:
I have no idea about the previous states of the views...
What would be a better approach?
android mvvm fragment 
android-architecture-components android-livedata asked Mar 25 at 3:23
lost17lost17
4572826
add a comment |
Assuming I have 2 fragments A and B. Each of them contains a view respectively viewA and viewB. Both views are hidden by default.
There is a shared view model called sharedVM (linked to the activity)
An event A from the user will show viewA with animation and hide viewB with animation (if viewB is visible)
An event B from the user will show viewB with animation and hide viewA with animation (if viewA is visible)
I though about:
Solution 1:
Use a LiveData state inside sharedVM to know if views are hidden or visible.
But then when the fragment is destroyed and recreated:
The hide/show animation will play again, that's not good.
Solution 2:
Use LiveDataEvent inside sharedVM to know dispatch and trigger the animations.
But then when the fragment is destroyed and recreated:
I have no idea about the previous states of the views...
What would be a better approach?
android mvvm fragment android-architecture-components android-livedata asked Mar 25 at 3:23
lost17lost17
4572826
add a comment |
Assuming I have 2 fragments A and B. Each of them contains a view respectively viewA and viewB. Both views are hidden by default.
There is a shared view model called sharedVM (linked to the activity)
An event A from the user will show viewA with animation and hide viewB with animation (if viewB is visible)
An event B from the user will show viewB with animation and hide viewA with animation (if viewA is visible)
I though about:
Solution 1:
Use a LiveData state inside sharedVM to know if views are hidden or visible.
But then when the fragment is destroyed and recreated:
The hide/show animation will play again, that's not good.
Solution 2:
Use LiveDataEvent inside sharedVM to know dispatch and trigger the animations.
But then when the fragment is destroyed and recreated:
I have no idea about the previous states of the views...
What would be a better approach?
android mvvm fragment android-architecture-components android-livedata asked Mar 25 at 3:23
lost17lost17
4572826
Assuming I have 2 fragments A and B. Each of them contains a view respectively viewA and viewB. Both views are hidden by default.
There is a shared view model called sharedVM (linked to the activity)
An event A from the user will show viewA with animation and hide viewB with animation (if viewB is visible)
An event B from the user will show viewB with animation and hide viewA with animation (if viewA is visible)
I though about:
Solution 1:
Use a LiveData state inside sharedVM to know if views are hidden or visible.
But then when the fragment is destroyed and recreated:
The hide/show animation will play again, that's not good.
Solution 2:
Use LiveDataEvent inside sharedVM to know dispatch and trigger the animations.
But then when the fragment is destroyed and recreated:
I have no idea about the previous states of the views...
What would be a better approach?
android mvvm fragment android-architecture-components android-livedata android mvvm fragment android-architecture-components android-livedata asked Mar 25 at 3:23
lost17lost17
4572826
asked Mar 25 at 3:23
lost17lost17
4572826
asked Mar 25 at 3:23
lost17lost17
4572826
asked Mar 25 at 3:23
lost17lost17
4572826
asked Mar 25 at 3:23
lost17lost17
4572826
4572826
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
I think, you need:
- manually restore view state (according current state in
LiveData) when fragment recreated - make view state observer ignore change if view currently in this state
You can do it in onViewCreated() callback. This fix make your first solution works.
answered Mar 25 at 6:27
XIII-thXIII-th
3,37221840
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I think, you need:
- manually restore view state (according current state in
LiveData) when fragment recreated - make view state observer ignore change if view currently in this state
You can do it in onViewCreated() callback. This fix make your first solution works.
answered Mar 25 at 6:27
XIII-thXIII-th
3,37221840
add a comment |
I think, you need:
- manually restore view state (according current state in
LiveData) when fragment recreated - make view state observer ignore change if view currently in this state
You can do it in onViewCreated() callback. This fix make your first solution works.
answered Mar 25 at 6:27
XIII-thXIII-th
3,37221840
add a comment |
I think, you need:
- manually restore view state (according current state in
LiveData) when fragment recreated - make view state observer ignore change if view currently in this state
You can do it in onViewCreated() callback. This fix make your first solution works.
answered Mar 25 at 6:27
XIII-thXIII-th
3,37221840
I think, you need:
- manually restore view state (according current state in
LiveData) when fragment recreated - make view state observer ignore change if view currently in this state
You can do it in onViewCreated() callback. This fix make your first solution works.
answered Mar 25 at 6:27
XIII-thXIII-th
3,37221840
answered Mar 25 at 6:27
XIII-thXIII-th
3,37221840
answered Mar 25 at 6:27
XIII-thXIII-th
3,37221840
answered Mar 25 at 6:27
XIII-thXIII-th
3,37221840
3,37221840
add a comment |
add a comment |
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