blocks|key|1043101|text|您可以将其作为LinearLayout.LayoutParams构造函数的一部分进行传递：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1043102|LinearLayout.LayoutParams+param+=+new+LinearLayout.LayoutParams(
++++LayoutParams.MATCH_PARENT,
++++LayoutParams.MATCH_PARENT,
++++1.0f
);
YOUR_VIEW.setLayoutParams(param);|code-block|syntax|javascript|1043103|最后一个参数是权重。|1043104|entityMap^0|7|P|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

You can pass it in as part of the <code>LinearLayout.LayoutParams</code> constructor:

<pre><code>LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(
 LayoutParams.MATCH_PARENT,
 LayoutParams.MATCH_PARENT,
 1.0f
);
YOUR_VIEW.setLayoutParams(param);
</code></pre>

The last parameter is the weight.

blocks|key|1043134|text|使用LinearLayout.LayoutParams|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1043135|LinearLayout.LayoutParams+params+=+new+LinearLayout.LayoutParams(
++++LayoutParams.WRAP_CONTENT,+LayoutParams.MATCH_PARENT);
params.weight+=+1.0f;
Button+button+=+new+Button(this);
button.setLayoutParams(params);|code-block|syntax|javascript|1043136|编辑:啊，Erich的答案更简单！|1043137|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/android/widget/LinearLayout.LayoutParams.html^0|2|P|2|P|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|G|5|H|7|10|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|11|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

Use <a href="http://developer.android.com/reference/android/widget/LinearLayout.LayoutParams.html" rel="noreferrer"><code>LinearLayout.LayoutParams</code></a>:

<pre><code>LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
 LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
params.weight = 1.0f;
Button button = new Button(this);
button.setLayoutParams(params);
</code></pre>

EDIT: Ah, Erich's answer is easier!

blocks|key|1043325|text|如果您已经在布局(Xml)文件中定义了视图，则只需以编程方式更改权重，这种方式会更好|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1043326|LinearLayout.LayoutParams+params+=+(LinearLayout.LayoutParams)+++
mButton.getLayoutParams();
params.weight+=+1.0f;
mButton.setLayoutParams(params);|code-block|syntax|javascript|1043327|新建一个LayoutParams会覆盖xml文件中定义的其他参数，比如边距，或者您需要在LayoutParams中指定所有参数。|1043328|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If you already define your view in your layout(xml) file, only want to change the weight programmatically, this way is better

<pre><code>LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) 
mButton.getLayoutParams();
params.weight = 1.0f;
mButton.setLayoutParams(params);
</code></pre>

new a LayoutParams overwrites other params defined in you xml file like margins, or you need to specify all of them in LayoutParams.

blocks|key|828372|text|如果宽度、高度和权重的构造函数不起作用，请尝试使用宽度和高度的构造函数。然后手动设置权重。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|828373|如果您想根据权重设置宽度，请在构造函数中将width设置为0。身高也是如此。下面的代码适用于我。|828374|LinearLayout.LayoutParams+childParam1+=+new+LinearLayout.LayoutParams(0,LinearLayout.LayoutParams.MATCH_PARENT);
childParam1.weight+=+0.3f;
child1.setLayoutParams(childParam1);

LinearLayout.LayoutParams+childParam2+=+new+LinearLayout.LayoutParams(0,LinearLayout.LayoutParams.MATCH_PARENT);
childParam2.weight+=+0.7f;
child2.setLayoutParams(childParam2);

parent.setWeightSum(1f);
parent.addView(child1);
parent.addView(child2);|code-block|syntax|javascript|828375|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If the constructor with width, height and weight is not working, try using the constructor with width and height. And then manually set the weight.

And if you want the width to be set according to the weight, set width as 0 in the constructor. Same applies for height.
Below code works for me.

<pre><code>LinearLayout.LayoutParams childParam1 = new LinearLayout.LayoutParams(0,LinearLayout.LayoutParams.MATCH_PARENT);
childParam1.weight = 0.3f;
child1.setLayoutParams(childParam1);

LinearLayout.LayoutParams childParam2 = new LinearLayout.LayoutParams(0,LinearLayout.LayoutParams.MATCH_PARENT);
childParam2.weight = 0.7f;
child2.setLayoutParams(childParam2);

parent.setWeightSum(1f);
parent.addView(child1);
parent.addView(child2);
</code></pre>

blocks|key|1043396|text|如果有人在寻找答案，请使用以下命令：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1043397|LinearLayout.LayoutParams+lay+=+(LinearLayout.LayoutParams)+myLayout.getLayoutParams();
lay.weight+=+0.5;|code-block|syntax|javascript|1043398|如果从xml文件初始化布局，这将比为线性布局提供新的布局参数方便得多。|1043399|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

If I someone looking for answer, use this: 

<pre><code>LinearLayout.LayoutParams lay = (LinearLayout.LayoutParams) myLayout.getLayoutParams();
lay.weight = 0.5;
</code></pre>

If you are initializing your layout from xml file, this will be much more convenient than providing new layout parameters for Linear Layout.

blocks|key|1043453|text|如果已经定义了layoutparams+(以可扩展标记语言或动态方式)，下面是一行代码：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1043454|((LinearLayout.LayoutParams)+mView.getLayoutParams()).weight+=+1;|code-block|syntax|javascript|1043455|entityMap^0|7|C|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

If <code>layoutparams</code> is already defined (in XML or dynamically), Here's a one liner:

<pre><code>((LinearLayout.LayoutParams) mView.getLayoutParams()).weight = 1;
</code></pre>

blocks|key|828307|text|LinearLayout.LayoutParams和TableLayout.LayoutParams中的任何一个都适用于我，对于buttons，右边的是TableRow.LayoutParams。这就是：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|828308|++++++++++++TableRow.LayoutParams+buttonParams+=+new+TableRow.LayoutParams(
++++++++++++++++++++TableRow.LayoutParams.MATCH_PARENT,
++++++++++++++++++++TableRow.LayoutParams.WRAP_CONTENT,+1f);|code-block|syntax|javascript|828309|关于使用MATCH_PARENT或WRAP_CONTENT是一样的。|828310|entityMap^0|0|P|Q|O|24|L|0|0|4|C|H|C|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|N|$]]

Any of <code>LinearLayout.LayoutParams</code> and <code>TableLayout.LayoutParams</code> worked for me, for buttons the right one is <code>TableRow.LayoutParams</code>. That is:

<pre><code> TableRow.LayoutParams buttonParams = new TableRow.LayoutParams(
 TableRow.LayoutParams.MATCH_PARENT,
 TableRow.LayoutParams.WRAP_CONTENT, 1f);
</code></pre>

About using <code>MATCH_PARENT</code> or <code>WRAP_CONTENT</code> be the same.

blocks|key|1043703|text|我已经通过添加这行代码完成了我的任务！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1043704|LinearLayout.LayoutParams+mylayout+=+(LinearLayout.LayoutParams)+++
myview.getLayoutParams();
mylayout.weight+=+2;
myview.setLayoutParams(mylayout);|code-block|syntax|javascript|1043705|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I have done my task by adding this line of code!
<pre><code>LinearLayout.LayoutParams mylayout = (LinearLayout.LayoutParams) 
myview.getLayoutParams();
mylayout.weight = 2;
myview.setLayoutParams(mylayout);
</code></pre>

blocks|key|1043679|text|使用Kotlin，您可以执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1043680|import+android.content.Context
import+android.support.v4.content.ContextCompat
import+android.support.v7.widget.CardView
import+android.widget.*

import+android.widget.LinearLayout

class+RespondTo+:+CardView+{
++++constructor(context:+Context)+:+super(context)+{
++++++++init(context)
++++}

++++private+fun+init(context:+Context)+{


++++++++val+parent+=+LinearLayout(context)

++++++++parent.apply+{
++++++++++++layoutParams+=+LinearLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,
++++++++++++++++++++FrameLayout.LayoutParams.WRAP_CONTENT,+1.0f).apply+{
++++++++++++++++orientation+=+LinearLayout.HORIZONTAL

++++++++++++++++addView(EditText(context).apply+{
++++++++++++++++++++id+=+generateViewId()
++++++++++++++++++++layoutParams+=+LinearLayout.LayoutParams(0,
++++++++++++++++++++++++++++LinearLayout.LayoutParams.WRAP_CONTENT,+0.9f).apply+{
++++++++++++++++++++}
++++++++++++++++})
++++++++++++++++addView(ImageButton(context).apply({
++++++++++++++++++++layoutParams+=+LinearLayout.LayoutParams(0,
++++++++++++++++++++++++++++LinearLayout.LayoutParams.WRAP_CONTENT,+0.1f)
++++++++++++++++++++background+=+null
++++++++++++++++++++setImageDrawable(ContextCompat.getDrawable(context,+R.drawable.ic_save_black_24px))
++++++++++++++++++++id+=+generateViewId()
++++++++++++++++++++layoutParams+=+RelativeLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
++++++++++++++++++++++++++++LinearLayout.LayoutParams.WRAP_CONTENT).apply+{
++++++++++++++++++++++++addRule(RelativeLayout.ALIGN_PARENT_RIGHT)
++++++++++++++++++++++++//+addRule(RelativeLayout.LEFT_OF,+myImageButton.id)
++++++++++++++++++++}
++++++++++++++++}))
++++++++++++}
++++++++}
++++++++this.addView(parent)
++++}
}|code-block|syntax|javascript|1043681|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Using Kotlin you can do something like:

<pre><code>import android.content.Context
import android.support.v4.content.ContextCompat
import android.support.v7.widget.CardView
import android.widget.*

import android.widget.LinearLayout

class RespondTo : CardView {
 constructor(context: Context) : super(context) {
 init(context)
 }

 private fun init(context: Context) {


 val parent = LinearLayout(context)

 parent.apply {
 layoutParams = LinearLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,
 FrameLayout.LayoutParams.WRAP_CONTENT, 1.0f).apply {
 orientation = LinearLayout.HORIZONTAL

 addView(EditText(context).apply {
 id = generateViewId()
 layoutParams = LinearLayout.LayoutParams(0,
 LinearLayout.LayoutParams.WRAP_CONTENT, 0.9f).apply {
 }
 })
 addView(ImageButton(context).apply({
 layoutParams = LinearLayout.LayoutParams(0,
 LinearLayout.LayoutParams.WRAP_CONTENT, 0.1f)
 background = null
 setImageDrawable(ContextCompat.getDrawable(context, R.drawable.ic_save_black_24px))
 id = generateViewId()
 layoutParams = RelativeLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
 LinearLayout.LayoutParams.WRAP_CONTENT).apply {
 addRule(RelativeLayout.ALIGN_PARENT_RIGHT)
 // addRule(RelativeLayout.LEFT_OF, myImageButton.id)
 }
 }))
 }
 }
 this.addView(parent)
 }
}
</code></pre>

How can I set the value for the attribute <code>layout_weight</code> for button in android dynamically from java code ?

How to set layout_weight attribute dynamically from code?

Kotlin

如何在java代码中动态设置android中按钮的属性layout_weight的值？

问如何从代码中动态设置layout_weight属性？
EN

回答 9

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何从代码中动态设置layout_weight属性？EN

回答 9

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何从代码中动态设置layout_weight属性？
EN