WeightSum not working as expected in a LinearLayout in android

Question

Well, I have a LinearLayout with two children, an EditText and a Button and they both have a weightSum of 3. All I want is to have a horizontal line with 2 layout_weight EditText and 1 layout_weight Button. Here is my code:

<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:weightSum="3">

    <EditText
        android:id="@+id/edit1"
        android:inputType="textAutoComplete"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="2"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/DBLocations"
        android:layout_weight="1"/>
</LinearLayout>

But weights aren't working, here is the result: screenshot of the wrong result What I have to do in order to have 2 layout_weight in EditText and 1 for the Button?

Both the widths must be **0dp**. And `weightSum` can be omitted. — Phantômaxx, Sep 09 '17 at 15:25
My question shows scientific effort it is completely clear, useful and professional. Why you downvoted me? I already reported this. — ArgonOne, Sep 09 '17 at 16:53
Your question shows no effort in reading and understanding the official docs about weights. — Phantômaxx, Sep 09 '17 at 17:01
You have right but it also needs to write in second line of code `android:layout_width="match_parent"` instead of wrap_content. It isn't working differently. — ArgonOne, Sep 09 '17 at 18:16
Then don't argue that weights don't work as **you** expect them to. — Phantômaxx, Sep 09 '17 at 21:29

score 5 · Accepted Answer · answered Sep 09 '17 at 15:08

You should set android:orientation="horizontal" in your XML code .

And add android:layout_width="0dp" in your Button and EditText .

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal
    android:weightSum="3">

<EditText
    android:id="@+id/edit1"
    android:inputType="textAutoComplete"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_weight="2"/>
<Button
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:text="@string/DBLocations"
    android:layout_weight="1"/>
</LinearLayout>

And also change the second line `android:layout_width` to be `match_parent` instead of `wrap_content` right? :) Now its working!Thanks. — ArgonOne, Sep 09 '17 at 15:24

score 0 · Answer 2 · edited Jan 20 '18 at 08:52

Make 'layout_width' as '0dp' for Button and set orientation for LinearLayout as horizontal as shown

<LinearLayout android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:orientation="horizontal 
    android:weightSum="3"> 

    <EditText android:id="@+id/edit1" 
        android:inputType="textAutoComplete" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="2"/> 

    <Button android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:text="@string/DBLocations" 
        android:layout_weight="1"/> 
</LinearLayout>

I think I can ommit the code for horizontal orientation as it is the default value, right? — ArgonOne, Sep 09 '17 at 15:43

WeightSum not working as expected in a LinearLayout in android

2 Answers2