Android-ellipsize ="end"不显示三个点 [英] Android - ellipsize="end" Not Showing Three Dots

问题描述

我正在处理 ConstraintLayout 中包含的 TextView .

如果文本长度超过maxLength，我希望ellipsize在文本末尾(在TextView中)添加三个点.

I want ellipsize to add three dots at the end of text(in the TextView) if its length exceeds maxLength.

maxLines ="1"和ellipsize ="end"似乎是最好的答案.不幸的是，它不适用于我的情况.三个点根本不显示.

maxLines="1" and ellipsize="end" seemed to the best answer after a thorough research about my question. Unfortunately, it didn't work for my case. The three dots did't show at all.

这是快照:

原始字符串是"Test for long description"(删除了n).应该显示测试长时间描述...".

The original string was "Test for long description"(The n was dropped). It's supposed to show "Test for long descrip...".

这是我的xml:

<TextView
    android:id="@+id/txtDescription"
    android:maxLength="24"
    android:maxLines="1"
    android:ellipsize="end"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginStart="120dp"
    android:layout_marginTop="8dp"
    android:layout_marginEnd="16dp"
    android:layout_marginBottom="8dp"
    android:text="DescriptionView"
    android:textSize="18sp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.0"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.72" />

我觉得XML中有一些覆盖ellipsize的东西，还是我错过了XML文件中的关键内容?

I feel like there's something override ellipsize in the XML, or did I miss something crucial in the XML file?

推荐答案

问题是:

android:maxLength="24"

将其删除，因为您希望将 TextView 椭圆化.
当TextView的宽度不足以显示整个文本时，它将变为椭圆形.
我认为您不了解 android:ellipsize ="end" 这个属性的全部含义.
如果它足够宽，那么您将不会在末尾看到任何圆点，因为它们是不需要的.
如果您设置 android:layout_width ="40dp" ，那么您将看到圆点.
使用 android:layout_width ="wrap_content" 时， TextView 足够宽并且没有椭圆.

remove it since you want the TextView to be ellipsized.
A TextView gets ellipsized when it is not wide enough to show the whole text.
I think you do not understand what this attribute android:ellipsize="end" is all about.
If it is wide enough then you will not see any dots at the end because they are not needed.
If you set android:layout_width="40dp" then you will see the dots.
With android:layout_width="wrap_content" the TextView is wide enough and it is not ellipsized.

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