/
Pager2Fragment.kt
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/
Pager2Fragment.kt
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/*
* Copyright (C) 2021 panpf <panpfpanpf@oulook.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.panpf.assemblyadapter.sample.ui.pager2
import android.annotation.SuppressLint
import android.os.Bundle
import android.view.LayoutInflater
import android.view.ViewGroup
import androidx.appcompat.widget.Toolbar
import androidx.core.view.isVisible
import androidx.fragment.app.viewModels
import androidx.navigation.fragment.navArgs
import androidx.paging.LoadState
import androidx.recyclerview.widget.ConcatAdapter
import androidx.viewpager2.widget.ViewPager2
import com.github.panpf.assemblyadapter.pager2.AssemblyFragmentStateAdapter
import com.github.panpf.assemblyadapter.pager2.AssemblySingleDataFragmentStateAdapter
import com.github.panpf.assemblyadapter.sample.base.ToolbarFragment
import com.github.panpf.assemblyadapter.sample.databinding.FragmentPager2Binding
import com.github.panpf.assemblyadapter.sample.item.pager.AppGroupFragmentItemFactory
import com.github.panpf.assemblyadapter.sample.item.pager.AppsOverviewFragmentItemFactory
import com.github.panpf.assemblyadapter.sample.item.pager.LoadStateFragmentItemFactory
import com.github.panpf.assemblyadapter.sample.vm.PagerPinyinGroupOverviewAppsViewModel
class Pager2Fragment : ToolbarFragment<FragmentPager2Binding>() {
private val args: Pager2FragmentArgs by navArgs()
private val viewModel by viewModels<PagerPinyinGroupOverviewAppsViewModel>()
override fun createViewBinding(
inflater: LayoutInflater, parent: ViewGroup?
): FragmentPager2Binding {
return FragmentPager2Binding.inflate(inflater, parent, false)
}
override fun onInitData(
toolbar: Toolbar,
binding: FragmentPager2Binding,
savedInstanceState: Bundle?
) {
toolbar.title = args.title
toolbar.subtitle = args.subtitle
val appsOverviewAdapter = AssemblySingleDataFragmentStateAdapter(
this,
AppsOverviewFragmentItemFactory()
)
val fragmentStateAdapter = AssemblyFragmentStateAdapter<Any>(
this,
listOf(AppGroupFragmentItemFactory())
)
val footerLoadStateAdapter = AssemblySingleDataFragmentStateAdapter(
this,
LoadStateFragmentItemFactory()
)
binding.pager2Pager.apply {
adapter = ConcatAdapter(
ConcatAdapter.Config.Builder()
.setIsolateViewTypes(true)
.setStableIdMode(ConcatAdapter.Config.StableIdMode.SHARED_STABLE_IDS)
.build(),
appsOverviewAdapter,
fragmentStateAdapter,
footerLoadStateAdapter
)
registerOnPageChangeCallback(object : ViewPager2.OnPageChangeCallback() {
override fun onPageSelected(position: Int) {
super.onPageSelected(position)
updatePageNumber(binding)
}
})
}
viewModel.loadingData.observe(viewLifecycleOwner) {
binding.pager2ProgressBar.isVisible = it == true
binding.pager2PageNumberText.isVisible = it != true
}
viewModel.appsOverviewData.observe(viewLifecycleOwner) {
appsOverviewAdapter.data = it
updatePageNumber(binding)
}
viewModel.pinyinGroupAppListData.observe(viewLifecycleOwner) {
fragmentStateAdapter.submitList(it)
footerLoadStateAdapter.data = LoadState.NotLoading(true)
updatePageNumber(binding)
}
}
@SuppressLint("SetTextI18n")
private fun updatePageNumber(binding: FragmentPager2Binding) {
val pager = binding.pager2Pager
binding.pager2PageNumberText.text =
"${pager.currentItem + 1}/${pager.adapter?.itemCount ?: 0}"
}
}