我构建了一个片段,希望将其放置在活动中。
到目前为止,我的代码如下:
MainActivity.kt
class MainActivity: AppCompatActivity() {
@Inject
lateinit var teamInfoModule: TeamInfoModule;
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
DaggerServiceModuleComponent.create().inject(this)
val bundle = Bundle()
val teamArrayList: ArrayList<Team> = this.teamInfoModule.getAllTeamData()
val homeFragment = HomeFragment()
bundle.putParcelableArrayList("teamData", teamArrayList)
homeFragment.arguments = bundle
val fragmentManager: FragmentManager = supportFragmentManager
val fragmentTransaction: FragmentTransaction = fragmentManager.beginTransaction()
fragmentTransaction.replace(R.id.home_fragment, homeFragment).commit()
}
}
activity_main.xml
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:id="@+id/activity_main">
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
HomeFragment.kt
class HomeFragment @Inject constructor(): Fragment() {
lateinit var team: Team
override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
super.onCreateView(inflater, container, savedInstanceState)
DaggerServiceModuleComponent.create().inject(this)
val binding: ViewDataBinding = DataBindingUtil.inflate<ViewDataBinding>(inflater, R.layout.layout_home, container, false)
print(arguments.toString())
val allTeams: ArrayList<Team> = arguments?.get("teamData") as ArrayList<Team>
this.team = allTeams[0]
binding.setVariable(BR.team, team)
return binding.root
}
}
layout_home.xml(与HomeFragment绑定)
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<variable
name="team"
type="com.example.bluelightlite.models.Team" />
</data>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".fragments.HomeFragment">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="1dp"
android:layout_marginTop="79dp"
android:layout_marginEnd="1dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="@+id/info_text"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="@{team.name}"/>
</androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
运行时,出现错误:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.bluelightlite, PID: 10421
java.lang.IllegalArgumentException: No view found for id 0x7f07003a (com.example.bluelightlite:id/activity_main) for fragment HomeFragment{4b02ab3 (55c458bd-2931-48c6-8087-5e82641313c1) id=0x7f07003a}
答案 0 :(得分:2)
该异常表明您正在尝试添加要与不存在的视图关联的Fragment。实际上,我不确定R.id.home_fragment
的来源。
解决方法是这样
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:id="@+id/root_container">
</FrameLayout>
然后
if(savedInstanceState == null) { // initial transaction should be wrapped like this
supportFragmentManager.beginTransaction()
.replace(R.id.root_container, homeFragment)
.commitAllowingStateLoss()
}
因此,另一个答案也正确,即使用container
和R.id.container
,但是您也缺少setContentView(R.layout.activity_main)
。
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
答案 1 :(得分:1)
将片段添加到活动
private fun addFragmentToFragment(fragment: Fragment){
val ft = childFragmentManager.beginTransaction()
ft.add(R.id.framlayout, fragment, fragment.javaClass.name)
ft.commitAllowingStateLoss()
}
在片段中添加片段
var exportSession: AVAssetExportSession!
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
picker.dismiss(animated: true, completion: nil)
guard let videoURL = (info[UIImagePickerController.InfoKey.mediaURL] as? URL) else { return }
encodeVideo(videoURL)
}
func encodeVideo(_ videoURL: URL) {
let avAsset = AVURLAsset(url: videoURL, options: nil)
//Create Export session
exportSession = AVAssetExportSession(asset: avAsset, presetName: AVAssetExportPresetPassthrough)
let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0] as URL
let filePath = documentsDirectory.appendingPathComponent("rendered-Video.mp4")
deleteFile(filePath)
exportSession!.outputURL = filePath
exportSession!.outputFileType = AVFileType.mp4
exportSession!.shouldOptimizeForNetworkUse = true
let start = CMTimeMakeWithSeconds(0.0, preferredTimescale: 0)
let range = CMTimeRangeMake(start: start, duration: avAsset.duration)
exportSession.timeRange = range
exportSession!.exportAsynchronously(completionHandler: {() -> Void in
DispatchQueue.main.async {
Utility.stopActivityIndicator()
switch self.exportSession!.status {
case .failed:
self.view.makeToast(self.exportSession?.error?.localizedDescription ?? "")
case .cancelled:
self.view.makeToast("Export canceled")
case .completed:
if let url = self.exportSession.outputURL {
//Rendered Video URL
}
default:
break
}
}
})
}
答案 2 :(得分:0)
用这样的容器ID替换此行
fragmentTransaction.replace(R.id.container, homeFragment).commit()
并在您的mainactivity xml中添加framelayout
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/container"
/>
答案 3 :(得分:0)
您需要给您的片段一个ID,并在活动布局中引用它。例如:
<fragment android:name=com.example.bluelightlite.models.Team"
android:id="@+id/Team"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="match_parent" />