两个并排的 TextViews 的重力 [英] Gravity of two side-by-side TextViews

问题描述

我想并排放置两个 TextView，我希望一个触摸屏幕右侧，另一个触摸左侧.我不想使用数字来定义宽度，因为不同尺寸的屏幕会有不同的表现.所以我正在尝试使用 layout_gravity，但由于某种原因它不起作用.

I'm trying to have two TextViews side-by-side, and I want one to be touching the right-side of the screen and the other, the left-side. I don't want to define the widths using numbers because screens of different sizes would behave differently. So I'm trying to use layout_gravity, which is not working for some reason.

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    >

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="16dp"
    android:layout_gravity="left"
    android:text="rrr"
    android:textColor="@color/secondTextColor"
    />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="right"
    android:textSize="16dp"
    android:text="sss"
    android:textColor="@color/secondTextColor" />

</LinearLayout>

谁能告诉我为什么?谢谢！

Can anyone tell me why? Thanks!

推荐答案

您可以为每个 TextView 创建一个 LinearLayout 如下:

You can create one LinearLayout for each TextView as follows :

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:gravity="start">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="16dp"
        android:text="rrr"
        android:textColor="#f2f2"
        />
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="end">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textSize="16dp"
            android:text="sss"
            android:textColor="#f3f3" />
    </LinearLayout>
</LinearLayout>

重要的是，在你的第一个 LinearLayout 中你放置了 android:gravity="start" 和你的第二个 android:gravity="end"，然后它会工作:)

And the important thing is that in your first LinearLayout you put android:gravity="start" and in your second one android:gravity="end", then it will work :)

使用 end 而不是 right 来确保在从右到左的语言环境中的正确行为.

Use end instead of right to ensure correct behavior in right-to-left locales.

为什么结束"比正确"好?

Why is "end" better than "right"?

使用 Gravity#LEFT 和 Gravity#RIGHT 会导致在文本从 right 流向 <代码>左.使用 Gravity#START 和 Gravity#END 代替.同样，在 XML 重力和 layout_gravity 属性中，使用 start 而不是 left.对于 paddingLeft 和 layout_marginLeft 等 XML 属性，请使用 paddingStart 和 layout_marginStart.注意:如果您的 minSdkVersion 小于 17，您应该添加旧的 left/right 属性以及新的 start/right 属性.在不支持 RTL 且 start/right 属性未知并因此被忽略的旧平台上，您需要旧的 left/right 属性.有一个单独的 lint 检查可以捕获该类型的错误.

Using Gravity#LEFT and Gravity#RIGHT can lead to problems when a layout is rendered in locales where text flows from right to left. Use Gravity#START and Gravity#END instead. Similarly, in XML gravity and layout_gravity attributes, use start rather than left. For XML attributes such as paddingLeft and layout_marginLeft, use paddingStart and layout_marginStart. NOTE: If your minSdkVersion is less than 17, you should add both the older left/right attributes as well as the new start/right attributes. On older platforms, where RTL is not supported and the start/right attributes are unknown and therefore ignored, you need the older left/right attributes. There is a separate lint check which catches that type of error.

(注意:对于 Gravity#LEFT 和 Gravity#START，即使针对旧平台，您也可以使用这些常量，因为起始位掩码是左的超集位掩码.因此，您可以使用 gravity="start" 而不是 gravity="left|start".)

(Note: For Gravity#LEFT and Gravity#START, you can use these constants even when targeting older platforms, because the start bitmask is a superset of the left bitmask. Therefore, you can use gravity="start" rather than gravity="left|start".)

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