当使用API​​ 17进行渲染时，Android Button文本不会居中

在布局的图形视图中，当我从下面的图片中显示的按钮选择API 15或更低版本时，包围的按钮中的文本看起来很好。

In the graphical view of layout, when I choose API 15 or lower from the button shown in the image below, the text in the encircled buttons looks fine.

当我选择API 17即使xml代码相同，文本也会移位。更改按钮填充没有帮助。

When I choose API 17, the text is displaced even though the xml code is same. Changing the button padding does not help.

这只是Eclipse的一个问题，或者新版本的Android可能会看到这个替换的文本？

Is this just a problem with Eclipse or is it possible that new versions of android may see this displaced text?

解决此问题的方法有哪些？

What's the workaround to fix this?

XML代码：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".HomeActivity" >

<LinearLayout
    android:id="@+id/linearLayout1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_margin="3dp" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="100dp"
        android:src="@drawable/label" />
</LinearLayout>

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/linearLayout1"
    android:layout_below="@+id/linearLayout1"
    android:layout_marginTop="20dp"
    android:text="@string/about_title"
    android:textSize="20sp" />

<TextView
    android:id="@+id/textView2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/textView1"
    android:layout_alignRight="@+id/linearLayout1"
    android:layout_below="@+id/textView1"
    android:layout_marginTop="5dp"
    android:text="@string/temp" />

<LinearLayout
    android:id="@+id/linearLayout2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/textView2"
    android:layout_alignRight="@+id/textView2"
    android:layout_below="@+id/textView2"
    android:layout_marginTop="20dp"
    android:baselineAligned="false" >

    <Button
        android:id="@+id/button1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="@string/news" />

    <Button
        android:id="@+id/button2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="@string/tournaments" />

    <Button
        android:id="@+id/button3"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="@string/results" />
</LinearLayout>