Android 创建重复视图的控制器
我有一个应用程序,它有一个Android 创建重复视图的控制器,android,controller,android-lifecycle,conductor,Android,Controller,Android Lifecycle,Conductor,我有一个应用程序,它有一个 BaseListActivity承载 BaseController->充当ViewPager ListController->ViewPager的选项卡1 FavoriteController->ViewPager的选项卡2 DetailActivity->单击选项卡1上的项目时启动 DetailController->在DetailActivity 所以,编写代码给你一个想法 activity.xml: 基本控制器: } CoinListController: 类
BaseListActivity
承载
BaseController
->充当ViewPager
ListController
->ViewPager的选项卡1
FavoriteController
->ViewPager的选项卡2
DetailActivity
->单击选项卡1上的项目时启动
DetailController
->在DetailActivity
所以,编写代码给你一个想法
activity.xml:
基本控制器:
}
CoinListController:
类CoinListController:BaseMvvmController(),CoinListAdapter
.CoinListListener{
var list:list=emptyList()
var recyclerView:recyclerView?=null
lateinit变量swipeLayout:SwipeRefreshLayout
LazyThreadSafetyMode.NONE的专用val适配器{
CoinListAdapter(applicationContext!!,this)
}
覆盖创建视图(充气机:布局充气机,容器:视图组):视图{
val视图=充气机。充气(R.layout.coin\u list\u控制器,容器,错误)
swipeLayout=view.findViewById(R.id.swipContainer)
recyclerView=view.findViewById(R.id.listRecycler)
recyclerView!!.layoutManager=LinearLayoutManager(活动)
回收视图!!.addItemDecoration(DividerItemDecoration)(活动、,
DividerItemDecoration.垂直)
recyclerView!!.adapter=适配器
recyclerView!!.isNestedScrollingEnabled=false
view.swipcontainer.apply{
此为.setOnRefreshListener{
viewModel.getCoinList()
this.isRefreshing=false
}
}
返回视图
}
覆盖转速表(视图:视图){
超级转速表(视图)
带(视图模型){
if(list.isEmpty()){
getCoinList()
setSearchListener(视图)
}否则{
view.listRecycler.adapter=适配器
adapter.notifyDataSetChanged()
}
}
}
覆盖连接(视图:视图){
super.onDetach(视图)
view.listRecycler.adapter=null
println(“分离”)
}
覆盖包含的乐趣(硬币:CoinListItem){
viewModel.OnInclicked(硬币)
}
覆盖FavoriteClicked上的乐趣(coinFavoriteItem:coinFavoriteItem){
viewModel.onFavoriteClacked()
}
覆盖val viewModel:CoinListViewModel=get().koin.get()
覆盖状态更改(状态:Mvvm.state){
何时(州){
是否收到CoinListContract.State.CoinListReceived->{
列表=state.coins
适配器.附加项(列表)
}
是否单击了CoinListContract.State.CoinItem->{
Snackbar.make(查看!!,“点击硬币项目”,Snackbar.LENGTH\u SHORT)
//router.onActivityStarted()文件
startActivity(CoinDetailActivity.getLaunchIntent(activity!!,state.coin))
}
是否单击了CoinListContract.State.FavoriteClicked->{
Snackbar.make(查看!!,“单击收藏夹按钮”,Snackbar.LENGTH\u SHORT)
}
是CoinListContract.State.QueryRan->{
adapter.addItems(state.searchList)
}
is CoinListContract.State.Error->{
Log.d(“OnStateChange”,state.throwable.localizedMessage!!)
}
}
}
所以问题出在CoinListController
中,当我单击一个列表项时,DetailActivity
启动,然后我退出..返回到CoinListController
但是,对于随后每次单击一个项目,都会添加一个额外的侦听器(我认为)。因此,如果我在第三次单击某个项目时,CoinListController.OnInclicked
被调用3次,创建了CoinDetailActivity
的3个实例。因此,我必须向后按3次才能返回到CoinListController
调试模式下不存在此行为
我正在分离时将适配器设置为null。在控制器的生命周期中,什么是持久的?是我在适配器中设置的侦听器还是其他什么?在
CoinListActivity
和CoinBaseController
中设置根目录两次导致了问题
<LinearLayout android:id="@+id/mainLayout"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<com.bluelinelabs.conductor.ChangeHandlerFrameLayout
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
class CoinListActivity : AppCompatActivity() {
private lateinit var router: Router
/**
* Current implementation uses BlueLineLabs Router to navigate between views and handle animations
*/
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_coin_list)
router = Conductor.attachRouter(this, container, savedInstanceState)
router.setRoot(RouterTransaction.with(CoinBaseController()))
RoomSingleton.initDB(this)
.
.
.
class CoinBaseController : Controller() {
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup): View {
return inflater.inflate(R.layout.coin_base_controller, container, false).apply {
viewPager.adapter = TabAdapter()
tabs.setupWithViewPager(viewPager)
}
}
.
.
.
inner class TabAdapter : RouterPagerAdapter(this) {
override fun configureRouter(router: Router, position: Int) {
router.setPopsLastView(true)
when (position) {
0 -> router.pushController(RouterTransaction.with(CoinListController.newInstance()))
1 -> router.pushController(RouterTransaction.with(CoinFavoriteController()))
}
if (router.hasRootController().not())
router.setRoot(RouterTransaction.with(this@CoinBaseController))
}
override fun getCount(): Int = 2
override fun getPageTitle(position: Int): CharSequence? {
return if (position == 0)
"List"
else
"Favorites"
}
}
class CoinListController : BaseMvvmController<CoinListViewModel, CoinListContract.State>(), CoinListAdapter
.CoinListListener {
var list: List<CoinListItem> = emptyList()
var recyclerView: RecyclerView? = null
lateinit var swipeLayout: SwipeRefreshLayout
private val adapter by lazy(LazyThreadSafetyMode.NONE) {
CoinListAdapter(applicationContext!!, this)
}
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup): View {
val view = inflater.inflate(R.layout.coin_list_controller, container, false)
swipeLayout = view.findViewById(R.id.swipeContainer)
recyclerView = view.findViewById(R.id.listRecycler)
recyclerView!!.layoutManager = LinearLayoutManager(activity)
recyclerView!!.addItemDecoration(DividerItemDecoration(activity,
DividerItemDecoration.VERTICAL))
recyclerView!!.adapter = adapter
recyclerView!!.isNestedScrollingEnabled = false
view.swipeContainer.apply {
this.setOnRefreshListener {
viewModel.getCoinList()
this.isRefreshing = false
}
}
return view
}
override fun onAttach(view: View) {
super.onAttach(view)
with(viewModel) {
if (list.isEmpty()) {
getCoinList()
setSearchListener(view)
} else {
view.listRecycler.adapter = adapter
adapter.notifyDataSetChanged()
}
}
}
override fun onDetach(view: View) {
super.onDetach(view)
view.listRecycler.adapter = null
println("Detached")
}
override fun onCoinClicked(coin: CoinListItem) {
viewModel.onCoinClicked(coin)
}
override fun onFavoriteClicked(coinFavoriteItem: CoinFavoriteItem) {
viewModel.onFavoriteClicked()
}
override val viewModel: CoinListViewModel = get().koin.get()
override fun onStateChange(state: Mvvm.State) {
when (state) {
is CoinListContract.State.CoinListReceived -> {
list = state.coins
adapter.addItems(list)
}
is CoinListContract.State.CoinItemClicked -> {
Snackbar.make(view!!, "Coin Item Clicked", Snackbar.LENGTH_SHORT)
//router.onActivityStarted()
startActivity(CoinDetailActivity.getLaunchIntent(activity!!, state.coin))
}
is CoinListContract.State.FavoriteClicked -> {
Snackbar.make(view!!, "Favorite Button Clicked", Snackbar.LENGTH_SHORT)
}
is CoinListContract.State.QueryRan -> {
adapter.addItems(state.searchList)
}
is CoinListContract.State.Error -> {
Log.d("OnStateChange", state.throwable.localizedMessage!!)
}
}
}