Moko Moko - 5 months ago 11
Android Question

Invisible components still take up space

So, I have this one activity that looks like this:

http://i.imgur.com/UzexgEA.jpg

As you can see, it has a button, a list and a button.

If certain conditions are met, I want to hide both buttons just show the list, but as you can see in the next image, the buttons are still taking up space:

http://i.imgur.com/OyLIfSk.jpg

So my question, what can I do to enlarge the list to take that space out?

Here is my layout for the buttons and the list:

<?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" >

<Button
android:id="@+id/findSelected"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="registrarAsistencia"
android:text="Registrar Asistencia" />

<ListView
android:id="@+id/listaAlumnos"
android:layout_width="fill_parent"
android:layout_height="376dp"
android:layout_weight="2.29" />

<Button
android:id="@+id/btnChecarBoxes"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="seleccionarTodosNinguno"
android:text="Seleccionar / Deseleccionar todo" />
</LinearLayout>


And here it is the layout for the list's contents:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:orientation="vertical" >

<TextView
android:id="@+id/rowTextView"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:padding="10dp"
android:textSize="16sp"
android:textStyle="bold"/>

<TextView
android:id="@+id/rowTextView2"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:padding="10dp"
android:textSize="16sp"
android:textStyle="italic"/>

</LinearLayout>

<CheckBox
android:id="@+id/CheckBox01"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:focusable="false"
android:padding="10dp" />
</RelativeLayout>

Answer

Do not make the buttons View.INVISIBLE. Make the buttons View.GONE. There are three visibility states:

  • visible (normal)
  • invisible (pixels not drawn, but still takes up space)
  • gone (not included in rendering)