在code安卓weightSum XML属性 [英] weightSum xml attribute in code android

问题描述

在我的Andr​​oid应用程序，我需要动态地创建几个LinearLayout中的文本。
但我不能设置权重的每个元素。我想那LL看起来像XML部分：

 ＆LT;的LinearLayout
    机器人：方向=横向
    机器人：layout_width =FILL_PARENT
    机器人：layout_height =WRAP_CONTENT
    机器人：layout_margin =10px的
    机器人：weightSum =1
    机器人：ID =@ + ID / QWE＆GT;
＆LT;的TextView
    机器人：layout_weight =0.1
    机器人：layout_width =WRAP_CONTENT
    机器人：layout_height =WRAP_CONTENT
    机器人：文本=一些
/＆GT;
＆LT;的TextView
    机器人：layout_weight =0.8
    机器人：layout_width =WRAP_CONTENT
    机器人：layout_height =WRAP_CONTENT
    机器人：文字=字
/＆GT;
＆LT;的TextView
    机器人：layout_weight =0.1
    机器人：layout_width =WRAP_CONTENT
    机器人：layout_height =WRAP_CONTENT
    机器人：文字=这里
    机器人：重力=右
/＆GT;
＆LT; / LinearLayout中＆GT;
 

这看起来不错，但我需要同样的动态。
在java中code我写的：

 的LinearLayout LL =新的LinearLayout（背景）;
LinearLayout.LayoutParams的LayoutParams =新LinearLayout.LayoutParams（LinearLayout.LayoutParams.FILL_PARENT，LinearLayout.LayoutParams.WRAP_CONTENT）;
layoutParams.setMargins（10，10，10，10）;
ll.setLayoutParams（的LayoutParams）;
ll.setOrientation（LinearLayout.HORIZONTAL）;
ll.setBackgroundColor（0xFF888888）;
rootLL.addView（Ⅱ）;LinearLayout.LayoutParams PARAMS =新LinearLayout.LayoutParams（0，LinearLayout.LayoutParams.WRAP_CONTENT）;
params.setMargins（10，10，10，10）;LinearLayout.LayoutParams params1 =参数;
params1.weight = 0.15f;
TextView中1 =新的TextView（背景）;
one.setLayoutParams（params1）;
one.setText（一些）;
ll.addView（之一）;LinearLayout.LayoutParams params2 =参数;
params2.weight = 0.7f;
TextView的2 =新的TextView（背景）;
two.setLayoutParams（params2）;
two.setText（字）;
ll.addView（二）;LinearLayout.LayoutParams params3 =参数;
params3.weight = 0.15f;
TextView中3 =新的TextView（背景）;
three.setLayoutParams（params3）;
three.setText（这里）;
ll.addView（三级）;
 

但在这种情况下，我获得3 TextView中的等宽。看起来，我没加weightSum属性，主要LL，但我不知道该怎么做...

请帮帮忙！

感谢您！

解决方案

1. 在浮法preFER整数。这样你可以得到你想要的任何类型的分数（甚至1/3）。




2. 如果您设置每个视图的重量，则不需要设置weightSum。




3. 如果您设置的weightSum，你可以离开一个视图中没有任何重量，赋予其可用空间的其余部分。




4. 好像你给所有的意见相同的LayoutParams，而不是克隆它为他们每个人的。当您使用params2 =参数; ，这意味着你设置它的一个引用，而不是您创建一个新的。在该方法的结束时，都将指向相同的LayoutParams，与0.15f的重量（因为这是最后一个）。

In my android app I need dynamically create few LinearLayout's with text. But I can not set weight of each element. I want that LL looks like in xml part:

<LinearLayout
    android:orientation="horizontal"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_margin="10px"
    android:weightSum="1"
    android:id="@+id/qwe">
<TextView 
    android:layout_weight="0.1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="some"
/>
<TextView 
    android:layout_weight="0.8"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="word"
/>
<TextView 
    android:layout_weight="0.1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="here"
    android:gravity="right"
/>
</LinearLayout>

It looks good but I need the same dynamically. In java code I wrote:

LinearLayout ll = new LinearLayout(context);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParams.setMargins(10, 10, 10, 10);
ll.setLayoutParams(layoutParams);
ll.setOrientation(LinearLayout.HORIZONTAL);
ll.setBackgroundColor(0xFF888888);
rootLL.addView(ll);

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT);
params.setMargins(10, 10, 10, 10);

LinearLayout.LayoutParams params1 = params;
params1.weight = 0.15f;
TextView one = new TextView(context);
one.setLayoutParams(params1);
one.setText("some");
ll.addView(one);

LinearLayout.LayoutParams params2 = params;
params2.weight = 0.7f;
TextView two = new TextView(context);
two.setLayoutParams(params2);
two.setText("word");
ll.addView(two);

LinearLayout.LayoutParams params3 = params;
params3.weight = 0.15f;
TextView three = new TextView(context);
three.setLayoutParams(params3);
three.setText("here");
ll.addView(three);

But in this case I obtain three textView's with equal width. It looks that I did not add weightSum attribute for main LL but I don't know how to do it...

Please help!

Thank you!

解决方案

1. prefer integer over float . this way you can get any kind of fraction you wish (even 1/3) .

2. if you set the weight of each of the views , you don't need to set the weightSum .

3. if you set the weightSum , you can leave one view without any weight , giving it the rest of the space available.

4. it seems you give all of the views the same layoutparams instead of cloning it for each of them . when you use "params2 = params;" , it means that you set a reference to it and not that you create a new one . in the end of the method , all will point to the same layoutParams , with the weight of 0.15f (since that's the last one) .

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