Question

RecyclerView显示简单的项目。每个项目在TextView中都有一个FrameLayout。 TextView没有任何填充，但是在某些情况下它们会意外出现。下图显示打开键盘后立即出现填充。仅当文本包含换行符时才会出现填充。如何解决？

MainActivity.kt

class MainActivity : AppCompatActivity() {
    lateinit var adapter : MyAdapter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val recyclerView : RecyclerView = findViewById(R.id.recyclerView)
        val button : Button = findViewById(R.id.button)

        adapter = MyAdapter();
        recyclerView.adapter = adapter;

        button.setOnClickListener {
            adapter.notifyDataSetChanged()
        }

    }
}

class MyViewHolder(val view: View) : RecyclerView.ViewHolder(view) {
    val textView: TextView;

    init {
        textView = view.findViewById(R.id.txt)
    }
}

class MyAdapter : RecyclerView.Adapter<MyViewHolder>() {

    private val data = listOf("Text without \\n ", "multiline\ntext")

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) =
        MyViewHolder(LayoutInflater.from(parent.context)
            .inflate(R.layout.list_item, parent, false))

    override fun getItemCount() = data.size;

    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
        holder.textView.text = data[position]
    }

}

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
             android:orientation="vertical"
             android:layout_width="match_parent"
             android:layout_height="wrap_content">

    <TextView
            android:background="@android:color/holo_blue_light"
            android:id="@+id/txt"

            android:layout_width="wrap_content"
            android:layout_height="wrap_content"/>
</FrameLayout>

activity_main.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:background="#ffffff"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    <Button
            android:text="notifyDataSetChanged"
            android:layout_width="wrap_content"
            android:layout_height="48dp"
            android:id="@+id/button"
            app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintStart_toStartOf="parent"
    />
    <androidx.recyclerview.widget.RecyclerView
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
            app:layout_constraintTop_toTopOf="parent" app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent" app:layout_constraintBottom_toTopOf="@+id/button"
            android:id="@+id/recyclerView"/>
    <EditText
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:inputType="textPersonName"
            android:ems="10"
            android:id="@+id/editText"
            app:layout_constraintStart_toEndOf="@+id/button" app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>

TextView意外填充

0 个答案: