Question

如果我使用xml文件，我有一个名为layout_margin的选项（例如layout_margin =“1dp”用于文本视图），但我想以编程方式设置，我不知道该怎么做。

Answer 1

   LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)textview.getLayoutParams();
     params.setMargins(20, 0, 0, 0); 
     textview.setLayoutParams(params);

Answer 2

在将您的问题添加到StackOverflow之前请Google。

TextView tv = (TextView)findViewById(R.id.my_text_view);
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)tv.getLayoutParams();
params.setMargins(0, 0, 10, 0); //substitute parameters for left, top, right, bottom
tv.setLayoutParams(params);

Answer 3

你可以这样做：

TextView text = (TextView) findViewById(R.id.text);   
LinearLayout.LayoutParams params= new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.setMargins(left, top, right, bottom);//pass int values for left,top,right,bottom
text.setLayoutParams(params);

Answer 4

TextView tv = (TextView) findViewById(R.id.tvId);   
LinearLayout.LayoutParams llp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
llp.setMargins(50, 0, 0, 0); // llp.setMargins(left, top, right, bottom);
tv.setLayoutParams(llp);

Answer 5

注意，并非所有LayoutParams都有方法setMargins（）;

RelativeLayout，LinearLayout等有自己的内部类LayoutParams，因此setMargins的可用性并不总是可用。

Answer 6

试试这个：它有用......

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
               xmlns:s="library://ns.adobe.com/flex/spark" 
               xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"
               creationComplete="application1_creationCompleteHandler(event)">
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <fx:Script>
        <![CDATA[
            import mx.events.FlexEvent;

                [Bindable] public var isDoctor:Boolean;
                [Bindable] public var isLawyer:Boolean; 

            protected function application1_creationCompleteHandler(event:FlexEvent):void
            {
                isDoctor = Session.isDoctor();
                isLawyer = Session.isLawyer();
            }

        ]]>
    </fx:Script>
    <s:VGroup>
        <s:Label text="Some Text Lawyer" includeInLayout="{isLawyer}"  visible="{isLawyer}"/>
        <s:Label text="Some Text Doctor" includeInLayout="{isDoctor}"  visible="{isDoctor}"/>
    </s:VGroup>
</s:Application>

Answer 7

您可以使用setMargins()上的LinearLayout.LayoutParams。有关详细信息，请参阅this StackOverflow question的答案。

Answer 8

        TextView tv = (TextView)findViewById(R.id.item_title));
        RelativeLayout.LayoutParams mRelativelp = (RelativeLayout.LayoutParams) tv
                    .getLayoutParams();
        mRelativelp.setMargins(DptoPxConvertion(15), 0, DptoPxConvertion (15), 0);
        tv.setLayoutParams(mRelativelp);

    private int DptoPxConvertion(int dpValue)
    {
       return (int)((dpValue * mContext.getResources().getDisplayMetrics().density) + 0.5);
    }

textview的getLayoutParams（）应根据 xml 中textview的父对象，转换为相应的Params。

<RelativeLayout>
   <TextView
    android:id="@+id/item_title">
</RelativeLayout>

如果TextView的父级是RelativeLayout意味着，那么RelativeLayout.LayoutParams如上所述。如果parent是LinearLayout则意味着

LinearLayout.LayoutParams mLinearlp = (LinearLayout.LayoutParams) tv
                    .getLayoutParams();

要在不同设备上呈现相同的实际大小，请使用我上面使用的DptoPxConvertion（）方法。 setMargin（left，top，right，bottom）params将以像素为单位值而不是dp 。

以编程方式对文本视图的布局边距

8 个答案: