焦点不会移出 RowsSupportFragment

如何解决焦点不会移出 RowsSupportFragment

我创建了一个活动，它有一个简单的按钮和一个位于底部的 RowsSupportFragment。

初始焦点被赋予 Button，当我按下方向键时，焦点转移到 RowsSupportFragment 中的项目，之后只有方向键右侧和方向键左工作，当我向上点击方向键时，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_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".standard.TestActivity">

    <Button
        android:id="@+id/btnTest"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        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_width="match_parent"
        android:layout_height="220dp"
        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
    }
}

解决方法

尝试添加

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

到 styles.xml 中的 VerticalGridView 样式

如果它不起作用，请尝试添加

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

到 lb_rows_fragment.xml 中的 VerticalGridView