[英]Android, Eclipse: Item in .xml Layout Not Displaying in Graphical Layout
I am trying to add a spinner to my layout via Eclipse. 我试图通过Eclipse将微调器添加到布局中。 I have added an item in the .xml, but the item is not displaying in the graphical layout.
我在.xml中添加了一个项目,但是该项目未显示在图形布局中。 All I get are green arrows.
我得到的只是绿色箭头。
Here is what I'm seeing: 这是我所看到的:
Here is the .xml: 这是.xml:
<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.gui_test.MainActivity$PlaceholderFragment" >
<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="400dp"
android:layout_centerHorizontal="true" >
</ListView>
<Button
android:id="@+id/submitButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/listView1"
android:layout_below="@+id/listView1"
android:layout_marginTop="17dp"
android:text="Submit" />
<Button
android:id="@+id/refreshButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/submitButton"
android:layout_alignBottom="@+id/submitButton"
android:layout_alignLeft="@+id/listView1"
android:text="Refresh" />
<Spinner
android:id="@+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/submitButton"
android:layout_alignRight="@+id/refreshButton"
android:layout_below="@+id/listView1"
android:layout_marginRight="5dp"
android:layout_marginLeft="5dp"/>
</RelativeLayout>
I want the spinner to sit in between the "Refresh" and "Submit" buttons. 我希望微调框位于“刷新”和“提交”按钮之间。 How do I do this?
我该怎么做呢?
尝试删除alignLeft和alignRight并添加android:layout_centerHorizontal =“ true”,然后您还可以添加android:layout_alignTop =“ @ + id / refreshButton”将微调器与顶部的按钮对齐
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