焦点没有移出 RowsSupportFragment

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【中文标题】焦点没有移出 RowsSupportFragment【英文标题】:Focus not moving out of RowsSupportFragment 【发布时间】:2021-08-30 11:51:25 【问题描述】:

我创建了一个活动,它有一个简单的按钮和一个放置在底部的 RowsSupportFragment。

初始焦点被赋予 Button,当我按下 D-pad 时,焦点转移到 RowsSupportFragment 中的项目,之后只有 D-pad 右和 D-pad 左工作,当我向上单击 D-pad 时,焦点不会' t 转到按钮。

activity_test.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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_
    android:layout_
    tools:context=".standard.TestActivity">

    <Button
        android:id="@+id/btnTest"
        android:layout_
        android:layout_
        android:text="Test"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"/>

    <FrameLayout
        android:id="@+id/fragmentContainer"
        android:layout_
        android:layout_
        android:scrollbars="none"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

TestActivity.kt

class TestActivity : FragmentActivity() 

    override fun onCreate(savedInstanceState: Bundle?) 
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_test)
        loadFragment()
    

    private fun loadFragment() 
        supportFragmentManager.beginTransaction()
            .replace(R.id.fragmentContainer, BingeRowFragment())
            .commit()
    

BingeRowFragment.kt

class BingeRowFragment : RowsSupportFragment() 

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) 
        super.onViewCreated(view, savedInstanceState)
        createRows()
    

    private fun createRows() 
        val movieList = listOf("Movie1", "Movie2", "Movie3", "Movie4", "Movie5", "Movie6",
            "Movie7", "Movie8", "Movie9", "Movie10", "Movie11", "Movie12")

        val itemPresenter = BingeItemPresenter()
        val listRowAdapter = ArrayObjectAdapter(itemPresenter)
        movieList.forEach 
            listRowAdapter.add(it)
        

        val rowsAdapter = ArrayObjectAdapter(ListRowPresenter(FocusHighlight.ZOOM_FACTOR_MEDIUM))
        rowsAdapter.add(ListRow(listRowAdapter))
        adapter = rowsAdapter
    

BingeItemPresenter.kt

class BingeItemPresenter: Presenter() 

    private lateinit var movieImage: ImageView
    private lateinit var movieTitle: TextView

    override fun onCreateViewHolder(parent: ViewGroup): ViewHolder 
        // margin between items
        parent.findViewById<HorizontalGridView>(R.id.row_content).setItemSpacing(24)
        val cardViewLayout = LayoutInflater.from(parent.context)
            .inflate(R.layout.standard_movie_item, parent, false)

        movieImage = cardViewLayout.findViewById(R.id.movie_image)
        movieTitle = cardViewLayout.findViewById(R.id.movie_name)

        return ViewHolder(cardViewLayout)
    

    override fun onBindViewHolder(viewHolder: ViewHolder, item: Any) 
        val movie = item as String
        movieImage.setImageResource(R.drawable.movie)
        movieTitle.text = movie
    

    override fun onUnbindViewHolder(viewHolder: ViewHolder?) 
        // nullify image
    

【问题讨论】:

请分享您的布局和代码 我犯了一个愚蠢的错误,我使用的样式不是leanback,而是AppCompat, ,将其更改为 parent="@style/Theme.Leanback",效果很好。 我面临着类似的事情。想知道这是否仅在 API 28 上发生? @SubhasmithThapa,对我来说,它并不特定于操作系统。有时您可能会错过注意焦点,在焦点状态下向视图添加一些荧光笔。 【参考方案1】:

尝试添加

 <item name="focusOutFront">true</item>
 <item name="focusOutEnd">true</item>

styles.xml中的 VerticalGridView 样式

如果不起作用,请尝试添加

app:focusOutEnd="true"
app:focusOutFront="true"

lb_rows_fragment.xml中的VerticalGridView

【讨论】:

我犯了一个愚蠢的错误,我使用的样式不是leanback,而是AppCompat, ,将其更改为 parent="@style/Theme.Leanback",效果很好。

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