如果TextView有1行或2行，如何将其高度设置为wrap_content？

<TextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:maxLines="2"
    android:ellipsize="end"
    android:text="这是一个示例文本。" />

public class MaxLinesTextView extends TextView {
    private int maxLines;

    public MaxLayoutTextView(Context context) {
        super(context);
    }

    public MaxLayoutTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(attrs);
    }

    public MaxLayoutTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(attrs);
    }

    private void init(AttributeSet attrs) {
        TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.MaxLinesTextView);
        maxLines = a.getInteger(R.styleable.MaxLinesTextView_maxLines, Integer.MAX_VALUE);
        a.recycle();
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        if (getLineCount() > maxLines) {
            Layout layout = getLayout();
            if (layout != null) {
                int lineEnd = layout.getLineEnd(maxLines - 1);
                setMaxLines(maxLines);
                setEllipsize(TextUtils.TruncateAt.END);
                setText(getText().subSequence(0, lineEnd));
            }
        }
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }
}

<com.yourpackage.MaxLinesTextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:maxLines="2"
    android:text="这是一个示例文本。" />

<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:text="这是一个示例文本。" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.2" />

    <androidx.constraintlayout.widget.Constraint
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@id/textView"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="@id/guideline" />
</androidx.constraintlayout.widget.ConstraintLayout>