英文:
Is it possible to set first coming page of viewPager2 with Intent in Kotlin?
问题
我在Kotlin中使用ViewPager2。
根据数据库的数据值，我像下面这样更改viewPager的页面索引：
在DiaryActivity中：
diaryDB
.document("${userId}_${writeTime}")
.get()
.addOnCompleteListener { task ->
if (task.isSuccessful) {
val document = task.result
if (document != null) {
if (document.exists()) {
viewPager.currentItem = 1
} else {
viewPager.currentItem = 0
}
}
} else {
viewPager.currentItem = 0
}
}
但是当我通过Intent从其他Activity调用DiaryActivity时（如果数据值需要跳转到currentItem 1），它首先跳转到currentItem = 0，然后再滑动到currentItem = 1。
我不希望屏幕首先显示0，然后再滑动到1，我希望屏幕首先显示1。
使用ViewPager2是否有可能实现这个效果？
英文:
I use ViewPager2 in Kotlin.
And according to the data value of DB, I change viewPager's page index like below:
in DiaryActivity:
diaryDB
.document("${userId}_${writeTime}")
.get()
.addOnCompleteListener { task ->
if (task.isSuccessful) {
val document = task.result
if(document != null) {
if (document.exists()) {
viewPager.currentItem = 1
} else {
viewPager.currentItem = 0
}
}
} else {
viewPager.currentItem = 0
}
}
But When I call DiaryActivity from other Activity by Intent, (If data value needs to go currentItem 1) It goes first to currentItem = 0 and slides to currentItem = 1
I don't want screen shows first 0 and slides to 1, I want screen firstly shows 1.
Is it possible with viewPager2?
答案1
得分: 1
这应该可以完成任务
viewPager.setCurrentItem(1, false)
//smoothScroll – true to smoothly scroll to the new item, false to transition immediately
英文:
This should do the trick
viewPager.setCurrentItem(1, false)
//smoothScroll – true to smoothly scroll to the new item, false to transition immediately
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