Android rtl viewpager with rtl tablayout

问题

I know this question may seem duplicated but i couldn't find a good solution for my problem. I am using tablayout with viewpager with fragmentPagerAdapter as adapter of viewpager. As you know viewpager is not supporting rtl layout so i have problems in rtl locales. I want to tabs start from right(first tab stick to right side of screen) and user can swipe correctly. How can i do this? Any help?

回答1:

I have faced this case before and there are 2 solutions

1- let us assume that you have 4 fragments F1,F2,F3 and F4, now you have to fetch all fragments in adapter in reversely as this F4,F3,F2 and F1, once you load your fragments set the select fragment is = pager.setCurrentItem(Titles.length - 1);

and make sure to reverse the titles also.

the second solution is to use custom view pager like

RTL view pager

hope you handle this

回答2:

The best solution would be to rotate the viewpager to 180:

mViewPager.setRotationY(180); //rotate the viewpager

then, rotate the inner view that contains the content of the tab for tablayout (to reverse the effect on the content).An example in the case of a textview:

if (textView.getRotationY() != 180) {
    textView.setRotationY(180);
 }

For PagerTabStrip, you should also rotate 180 the 3 visible tabs:

PagerTabStrip pt= container.findViewById(R.id.pager_tab_strip);
 pt.getChildAt(0).setRotationY(180);
 pt.getChildAt(1).setRotationY(180);
 pt.getChildAt(2).setRotationY(180);

That worked for me in an arabic app. It should work also for any rtl locales.

回答3:

Good news guys :). Android recently added new UI component called ViewPager2.

https://developer.android.com/jetpack/androidx/releases/viewpager2

Please find below the code and links :

dependencies {
    implementation "androidx.viewpager2:viewpager2:1.0.0"
}

Improvements from the previous ViewPager implementation:

RTL (right-to-left) layout support
Vertical orientation support
Reliable Fragment support (including handling changes to the underlying Fragment collection)
Dataset change animations (including DiffUtil support)

Below link explains about Migration guide from ViewPager to ViewPager2:

https://developer.android.com/training/animation/vp2-migration

Also we have demo example :

https://github.com/android/views-widgets-samples/tree/master/ViewPager2

来源：https://stackoverflow.com/questions/46828728/android-rtl-viewpager-with-rtl-tablayout

标签

android

android-viewpager

android-tablayout