Android TextView 文本不会居中
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Android TextView text won't center
提问by MrGibbage
I am trying to make a PIN entry activity, but one little thing is not quite working for me. I can't get the text to center in the TextView's at the top of the screenshot here:
我正在尝试进行 PIN 输入活动，但有一件小事对我来说不太奏效。我无法将文本置于屏幕截图顶部的 TextView 中心：
The way it will work is when the user is entering a PIN, I will place a star in each TextView for visible feedback. The problem is, I want the star to be centered. I have tried layout_gravity="center", but it doesn't make a difference. Here's my current layout:
它的工作方式是当用户输入 PIN 时，我将在每个 TextView 中放置一个星号以获取可见反馈。问题是，我希望星星居中。我试过 layout_gravity="center"，但没有什么区别。这是我目前的布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:textAppearance="?android:attr/textAppearanceLarge"
android:layout_height="wrap_content"
android:id="@+id/textView1"
android:text="PIN Required"
android:layout_width="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="12sp"
></TextView>
<LinearLayout
android:layout_width="match_parent"
android:id="@+id/linearLayout1"
android:layout_height="wrap_content"
android:layout_marginBottom="12sp"
android:layout_gravity="center_horizontal"
>
<TextView
android:id="@+id/text1"
android:layout_height="32sp"
android:layout_width="48sp"
android:layout_weight="1"
android:layout_marginRight="2sp"
android:layout_marginLeft="48sp"
android:background="#FFFFFF"
android:text="X"
android:layout_gravity="center"
></TextView>
<TextView
android:id="@+id/text2"
android:layout_height="32sp"
android:layout_width="48sp"
android:layout_weight="1"
android:layout_marginRight="2sp"
android:layout_marginLeft="2sp"
android:background="#FFFFFF"
></TextView>
<TextView
android:id="@+id/text3"
android:layout_height="32sp"
android:layout_width="48sp"
android:layout_weight="1"
android:layout_marginRight="2sp"
android:layout_marginLeft="2sp"
android:background="#FFFFFF"
></TextView>
<TextView
android:id="@+id/text4"
android:layout_height="32sp"
android:layout_width="48sp"
android:layout_weight="1"
android:layout_marginRight="48sp"
android:layout_marginLeft="2sp"
android:background="#FFFFFF"
></TextView>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:id="@+id/linearLayout2"
android:layout_height="wrap_content"
android:layout_marginBottom="12sp"
>
<Button
android:text="1"
android:textColor="#FFFFFF"
android:id="@+id/button1"
android:layout_height="32sp"
android:layout_width="64sp"
android:layout_weight="1"
android:editable="false"
android:layout_marginRight="2sp"
android:layout_marginLeft="48sp"
android:background="@drawable/action_background_gradient"
android:onClick="ButtonClicked"
></Button>
<Button
android:text="2"
android:textColor="#FFFFFF"
android:id="@+id/button2"
android:layout_height="32sp"
android:layout_width="64sp"
android:layout_weight="1"
android:editable="false"
android:layout_marginRight="2sp"
android:layout_marginLeft="2sp"
android:background="@drawable/action_background_gradient"
android:onClick="ButtonClicked"
></Button>
<Button
android:text="3"
android:textColor="#FFFFFF"
android:id="@+id/button3"
android:layout_height="32sp"
android:layout_width="64sp"
android:layout_weight="1"
android:editable="false"
android:layout_marginRight="48sp"
android:layout_marginLeft="2sp"
android:background="@drawable/action_background_gradient"
android:onClick="ButtonClicked"
></Button>
</LinearLayout>
<!--... and so on for the rest of the buttons ... -->
</LinearLayout>
I've got that android:text="X" in there for the first textview just so I can see if it is working. When I am done tweaking the layout, that will go away. What simple thing am I missing?
我在第一个 textview 中有那个 android:text="X" ，这样我就可以看看它是否正常工作。当我完成对布局的调整后，这种情况就会消失。我错过了什么简单的事情？
回答by josephus
use android:gravity="center"
用 android:gravity="center"
although I'm not seeing any EditText element in your code. You sure you posted the right code?
尽管我在您的代码中没有看到任何 EditText 元素。你确定你发布了正确的代码？
回答by Graeme
<TextView
android:id="@+id/text1"
android:layout_height="32sp"
android:layout_width="48sp"
android:layout_weight="1"
android:layout_marginRight="2sp"
android:layout_marginLeft="48sp"
android:background="#FFFFFF"
android:text="X"
android:layout_gravity="center"
android:gravity="center"
/>
android:layout_gravity="center"relates to this View's position in it's parent.
android:gravity="center"relates to where this View's contents are positioned.
android:layout_gravity="center"与此 View 在其父级中的位置相关。
android:gravity="center"与此 View 的内容所在的位置有关。
回答by Nitish
Instead of android:layout_gravity in text view use android:gravity="center_horizontal"
代替 android:layout_gravity 在文本视图中使用 android:gravity="center_horizontal"
回答by abriggs
This can be done programmatically as well, of-course:
这也可以以编程方式完成，当然：
textView.setGravity(Gravity.CENTER);
回答by Aleks G
To centre the text, use android:gravityon the TextView, not layout_gravity:
要使文本居中，请android:gravity在 TextView 上使用，而不是 layout_gravity：
<TextView
android:id="@+id/text1"
android:layout_height="32sp"
android:layout_width="48sp"
android:layout_weight="1"
android:layout_marginRight="2sp"
android:layout_marginLeft="48sp"
android:background="#FFFFFF"
android:text="X"
android:gravity="center" />
