How to leave a fixed footer in the Android layout?

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How to leave a fixed footer in the Android layout?

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#1 by (0 votes)

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I have the following layout in xml in my Android designer:

<?xmlversion="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Ativar Notificações:" />

            <CheckBox
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Inativo"
                android:id="@+id/checkAtivarNotificacao" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Tempo em Minutos das Notificações:"
                android:layout_marginTop="10dp" />

            <EditText
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:inputType="none|number"
                android:ems="10"
                android:id="@+id/txtIntervaloNotificacao"
                android:maxLength="4"
                android:focusable="true"
                android:focusableInTouchMode="true"/>
        </LinearLayout>

    </ScrollView>

<LinearLayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="bottom|center_horizontal">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Salvar"
        android:id="@+id/btSalvarConfiguracao" />

</LinearLayout>

The problem is that according to what I'm adding components on the screen and ScrollView goes down the save button disappears, so I want to leave a footer space with the save button fixed and flexible layout content regardless of how much it grows, just like in the standard android messaging application illustrated below:

android android-layout android-xml

asked by anonymous 16.12.2016 / 13:07

1 answer

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score 0 · Accepted Answer

It would be interesting to put your xml , so we know where to go wrong. But as the question is generic, here is my answer:

Use RelativeLayout . Whatever you want to center within it you use some of its centralization property:

centerInParent - Centers in the middle (horizontally and vertically) of RelativeLayout .

centerHorizontal - Centers horizontally, relative to RelativeLayout

centerVertical - Centralizes vertically, in relation to RelativeLayout

Code sample:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="match_parent">
    <Button
        android:id="@+id/btn"
        android:layout_height="wrap_content"
        android:layout_width="100dp"
        android:layout_centerInParent="true"/>

</RelativeLayout>

// EDIT

With your best specification in the question, I repeat, putting together an android layout each has its own way, and they have several ways of doing the same thing.

In your case I would simply put all that code inside a LinearLayout and assign the layout_weight=1 property to ScrollView .

Follow the code below:

<LinearLayout
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Ativar Notificações:" />

            <CheckBox
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Inativo"
                android:id="@+id/checkAtivarNotificacao" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Tempo em Minutos das Notificações:"
                android:layout_marginTop="10dp" />

            <EditText
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:inputType="none|number"
                android:ems="10"
                android:id="@+id/txtIntervaloNotificacao"
                android:maxLength="4"
                android:focusable="true"
                android:focusableInTouchMode="true"/>
        </LinearLayout>

    </ScrollView>

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center_horizontal">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Salvar"
            android:id="@+id/btSalvarConfiguracao"/>
    </LinearLayout>
</LinearLayout>