在android中手动设置微调下拉列表的宽度
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Manually set width of spinner dropdown list in android
提问by aspartame
Is it possible to set the width of a spinner dropdown list in code? I have a spinner populated with integers, and it does not look good with the list expanding to full width. Can I set the width to wrap the content somehow?
是否可以在代码中设置微调下拉列表的宽度？我有一个填充了整数的微调器，并且列表扩展到全宽时看起来不太好。我可以设置宽度以某种方式包装内容吗？
Spinner hSpinner = (Spinner) timerView.findViewById(R.id.timer_hour_spinner);
ArrayList<Integer> hList = new ArrayList<Integer>(21);
for (int i = 0; i <= 20; i++) { hList.add(i); }
ArrayAdapter hAdapter = new ArrayAdapter(RemindMe.this, android.R.layout.simple_spinner_item, hList);
hAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
hSpinner.setAdapter(hAdapter);
Thanks!
谢谢！
Linus
莱纳斯
采纳答案by CommonsWare
You can change the width of anything in code by adjusting its LayoutParams. The details of that varies by container (LinearLayoutvs. RelativeLayoutvs. ...).
您可以通过调整代码中的任何内容来更改其宽度LayoutParams。详细信息因容器而异（LinearLayoutvs. RelativeLayoutvs. ...）。
However, I'm confused why you want to change the width "in code". Why not just set the width to be wrap_contentin the layout XML?
但是，我很困惑为什么要“在代码中”更改宽度。为什么不将宽度设置wrap_content在布局 XML 中？
回答by JPMagalhaes
Just use:
只需使用：
setDropDownWidth(desiredWidth);
回答by PeteH
It is straightforward to control the spinner dropdown appearance. Try this:
控制微调器下拉外观很简单。尝试这个：
//Step 1. create the drop down list
static List<String> special_Spinner_Display_List = new ArrayList<String>();
// add your values to the list...(this is best done using a for loop)
special_Spinner_Display_List.add(item1);
special_Spinner_Display_List.add(item2); //etc., etc.
//Step 2. build the spinner
ArrayAdapter arrayAdapter_special = new ArrayAdapter(this,
R.layout.your_special_spinner, special_Spinner_Display_List);
arrayAdapter_special.setDropDownViewResource(R.layout.special_spinner_dropdown);
specialSpinner.setAdapter(arrayAdapter_special);
//Step 3. create an XML layout file called special_spinner_dropdown where you can
//style to your heart's content. Here's an example:
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/SpinnerDropdown"
style="?android:attr/spinnerDropDownItemStyle"
android:layout_width="match_parent"
android:layout_height="60dp"
android:background="#D5ECED"
android:ellipsize="marquee"
android:singleLine="true"
android:textSize="24sp"
android:textStyle="bold"
android:textColor="@color/black" />
That's it. Lemme know how it works!
就是这样。让我知道它是如何工作的！
回答by abhishesh
Set dropdown width in xml file of spinner using the tag
使用标签在微调器的 xml 文件中设置下拉宽度
android:dropDownWidth="@dimen/desired_width"
android:dropDownWidth="@dimen/desired_width"
Explaination :
说明：
mDropDownWidth = pa.getLayoutDimension(R.styleable.Spinner_dropDownWidth,
ViewGroup.LayoutParams.WRAP_CONTENT);
this field is used for dropdown width when spinner item is initialized in Spinner class
在 Spinner 类中初始化微调项时，此字段用于下拉宽度
for programatically changing spinner dropdown width above api level 16, use
要以编程方式更改 api 级别 16 以上的微调下拉菜单宽度，请使用
mSpinner.setDropDownWidth(size_in_pixel);
