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How to get from index in PageView onPageChanged in Flutter?

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0

How do I get the previous index in PageView onPageChanged? Currently, I can get the current index when the page changes with the following code:

PageView(
 children: <Widget>[
 SomeView(),
 SomeOtherViews(),
 SomeOtherViews(),
 ],
 controller: _pageViewController,
 onPageChanged: _onPageViewChange,
 );

_onPageViewChange(int page) 
 print("Current Page: " + page.toString());
 

Does flutter have any built-in function for this? Or should I just manually save the page as reference for the previous page?

• Yes I have thought of that, I just want to know if there's a faster way without having to create a variable

dart flutter pageviews

share|improve this question

asked Mar 27 at 16:19

RickRick

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add a comment | 

0

How do I get the previous index in PageView onPageChanged? Currently, I can get the current index when the page changes with the following code:

PageView(
 children: <Widget>[
 SomeView(),
 SomeOtherViews(),
 SomeOtherViews(),
 ],
 controller: _pageViewController,
 onPageChanged: _onPageViewChange,
 );

_onPageViewChange(int page) 
 print("Current Page: " + page.toString());
 

Does flutter have any built-in function for this? Or should I just manually save the page as reference for the previous page?

• Yes I have thought of that, I just want to know if there's a faster way without having to create a variable

dart flutter pageviews

share|improve this question

asked Mar 27 at 16:19

RickRick

1311010 bronze badges

add a comment | 

How do I get the previous index in PageView onPageChanged? Currently, I can get the current index when the page changes with the following code:

PageView(
 children: <Widget>[
 SomeView(),
 SomeOtherViews(),
 SomeOtherViews(),
 ],
 controller: _pageViewController,
 onPageChanged: _onPageViewChange,
 );

_onPageViewChange(int page) 
 print("Current Page: " + page.toString());
 

Does flutter have any built-in function for this? Or should I just manually save the page as reference for the previous page?

• Yes I have thought of that, I just want to know if there's a faster way without having to create a variable

dart flutter pageviews

share|improve this question

asked Mar 27 at 16:19

RickRick

1311010 bronze badges

PageView(
 children: <Widget>[
 SomeView(),
 SomeOtherViews(),
 SomeOtherViews(),
 ],
 controller: _pageViewController,
 onPageChanged: _onPageViewChange,
 );

_onPageViewChange(int page) 
 print("Current Page: " + page.toString());
 

dart flutter pageviews

dart flutter pageviews

share|improve this question

asked Mar 27 at 16:19

RickRick

1311010 bronze badges

share|improve this question

asked Mar 27 at 16:19

RickRick

1311010 bronze badges

asked Mar 27 at 16:19

RickRick

1311010 bronze badges

asked Mar 27 at 16:19

RickRick

1311010 bronze badges

2 Answers
2

active

oldest

votes

1

Decrement page by 1 and store in a class Variable (call setState & modify) or local variable. If current-page is 0 set previousPage to totalPageCount - 1.

_onPageViewChange(int page) 
 print("Current Page: " + page.toString());
 int previousPage = page;
 if(page != 0) previousPage--;
 else previousPage = 2;
 print("Previous page: $previousPage");

share|improve this answer

edited Mar 27 at 16:51

answered Mar 27 at 16:45

Tirth PatelTirth Patel

1,17822 gold badges1212 silver badges2727 bronze badges

add a comment | 

0

You can use PageView.builder, it will give you page index.

PageView.builder(
 itemBuilder: (context, index) 
 // index gives you current page position.
 return _buildPage();
 ,
 itemCount: listItemCount, // Can be null
)

share|improve this answer

answered Mar 27 at 16:58

divyanshu bhargavadivyanshu bhargava

39411 silver badge1515 bronze badges

add a comment | 

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1

Decrement page by 1 and store in a class Variable (call setState & modify) or local variable. If current-page is 0 set previousPage to totalPageCount - 1.

_onPageViewChange(int page) 
 print("Current Page: " + page.toString());
 int previousPage = page;
 if(page != 0) previousPage--;
 else previousPage = 2;
 print("Previous page: $previousPage");

share|improve this answer

edited Mar 27 at 16:51

answered Mar 27 at 16:45

Tirth PatelTirth Patel

1,17822 gold badges1212 silver badges2727 bronze badges

add a comment | 

1

Decrement page by 1 and store in a class Variable (call setState & modify) or local variable. If current-page is 0 set previousPage to totalPageCount - 1.

_onPageViewChange(int page) 
 print("Current Page: " + page.toString());
 int previousPage = page;
 if(page != 0) previousPage--;
 else previousPage = 2;
 print("Previous page: $previousPage");

share|improve this answer

edited Mar 27 at 16:51

answered Mar 27 at 16:45

Tirth PatelTirth Patel

1,17822 gold badges1212 silver badges2727 bronze badges

add a comment | 

Decrement page by 1 and store in a class Variable (call setState & modify) or local variable. If current-page is 0 set previousPage to totalPageCount - 1.

_onPageViewChange(int page) 
 print("Current Page: " + page.toString());
 int previousPage = page;
 if(page != 0) previousPage--;
 else previousPage = 2;
 print("Previous page: $previousPage");

share|improve this answer

edited Mar 27 at 16:51

answered Mar 27 at 16:45

Tirth PatelTirth Patel

1,17822 gold badges1212 silver badges2727 bronze badges

_onPageViewChange(int page) 
 print("Current Page: " + page.toString());
 int previousPage = page;
 if(page != 0) previousPage--;
 else previousPage = 2;
 print("Previous page: $previousPage");

share|improve this answer

edited Mar 27 at 16:51

answered Mar 27 at 16:45

Tirth PatelTirth Patel

1,17822 gold badges1212 silver badges2727 bronze badges

answered Mar 27 at 16:45

Tirth PatelTirth Patel

1,17822 gold badges1212 silver badges2727 bronze badges

answered Mar 27 at 16:45

Tirth PatelTirth Patel

1,17822 gold badges1212 silver badges2727 bronze badges

0

You can use PageView.builder, it will give you page index.

PageView.builder(
 itemBuilder: (context, index) 
 // index gives you current page position.
 return _buildPage();
 ,
 itemCount: listItemCount, // Can be null
)

share|improve this answer

answered Mar 27 at 16:58

divyanshu bhargavadivyanshu bhargava

39411 silver badge1515 bronze badges

add a comment | 

0

You can use PageView.builder, it will give you page index.

PageView.builder(
 itemBuilder: (context, index) 
 // index gives you current page position.
 return _buildPage();
 ,
 itemCount: listItemCount, // Can be null
)

share|improve this answer

answered Mar 27 at 16:58

divyanshu bhargavadivyanshu bhargava

39411 silver badge1515 bronze badges

add a comment | 

You can use PageView.builder, it will give you page index.

PageView.builder(
 itemBuilder: (context, index) 
 // index gives you current page position.
 return _buildPage();
 ,
 itemCount: listItemCount, // Can be null
)

share|improve this answer

answered Mar 27 at 16:58

divyanshu bhargavadivyanshu bhargava

39411 silver badge1515 bronze badges

PageView.builder(
 itemBuilder: (context, index) 
 // index gives you current page position.
 return _buildPage();
 ,
 itemCount: listItemCount, // Can be null
)

share|improve this answer

answered Mar 27 at 16:58

divyanshu bhargavadivyanshu bhargava

39411 silver badge1515 bronze badges

answered Mar 27 at 16:58

divyanshu bhargavadivyanshu bhargava

39411 silver badge1515 bronze badges

answered Mar 27 at 16:58

divyanshu bhargavadivyanshu bhargava

39411 silver badge1515 bronze badges