Question

I’m trying to create a android layout like:

[####EditText###][Button]

[####listview#####]

For that i’m using weight, but the following xml is giving me something very strang like:

[editText][button][ListView]

Someone know why?

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="@drawable/background"
    android:weightSum="10"
     >

    <EditText android:id="@+id/nova_lista"
        android:inputType="text"
        android:layout_height="wrap_content"
        android:layout_width="0dp"
        android:layout_weight="9"
        android:hint="@string/new_list_hint">

    </EditText>

    <Button android:id="@+id/nova_lista_botao"
        android:layout_height="wrap_content"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:text="@string/new_list"/>

    <ListView
        android:id="@+id/list_of_lists"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >
    </ListView>

</LinearLayout>

Answer 1

You are using android:orientation="vertical"

and you are specifying android:layout_width equal to 0dp.

For vertical layout layout_height should be 0 dp and for Horizontal layout layout_width should be 0 dp if you are using weight in LinearLayout.

Put EditText and Button in separate Horizontal Layout. Use below code

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
    android:background="@drawable/background"
     >
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:weightSum="10"
     >

    <EditText android:id="@+id/nova_lista"
        android:inputType="text"
        android:layout_height="wrap_content"
        android:layout_width="0dp"
        android:layout_weight="9"
        android:hint="@string/new_list_hint">

    </EditText>

    <Button android:id="@+id/nova_lista_botao"
        android:layout_height="wrap_content"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:text="@string/new_list"/>
</LinearLayout>
    <ListView
        android:id="@+id/list_of_lists"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >
    </ListView>

</LinearLayout>