java.lang.ArrayIndExoutofBoundSexception调用TextView GetlineEnd时

Question

我将TextView Maxline设置为5，当我致电GetlineEnd（4）时，它肯定具有5个以上的线路，它给了我ArrayIndIndexOutOfBoundSexception。我不知道为什么会发生这种情况。请帮忙吗？谢谢！

logs

06-12 02:50:42.256 30175 30175 E ErrorPageActivity: java.lang.ArrayIndexOutOfBoundsException: length=27; index=30
06-12 02:50:42.256 30175 30175 E ErrorPageActivity:     at android.text.StaticLayout.getLineStart(StaticLayout.java:1151)
06-12 02:50:42.256 30175 30175 E ErrorPageActivity:     at android.text.Layout.getLineEnd(Layout.java:1409)
06-12 02:50:42.256 30175 30175 E ErrorPageActivity:     at com.imdb.livingroom.firetv.util.TextViewExtensionsKt.visibleText(TextViewExtensions.kt:13)

textViewExtensions

fun TextView.visibleText(): String {
    val end = layout.getLineEnd(4)
    return layout.text.toString().substring(0,end);
}

布局xml

<TextView
        android:id="@+id/user_review_description"
        style="@style/text_body_two"
        android:layout_width="@dimen/review_description_width"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/micro_margin"
        android:ellipsize="end"
        android:maxLines="5"
        android:layout_marginStart="@dimen/medium_margin"
        android:importantForAutofill= "noExcludeDescendants"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/user_nickname"
        />

这是视图的图片。详细的评论块是有问题的文本视图

Answer 1

通过将其更改为val end = layout.getLineEnd（Layout.linecount -1）