how to align button at the bottom of the screen in LinearLayout

Question

I am using linearlayout as parent and inside it I have two child linearlayouts. I want to align the buttons in the last linearlayout to the bottom of the screen.The bottom margin of the buttons should match the main linearlayouts bottom margin

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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:id="@+id/parentlayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="top"
        android:orientation="vertical" >
    </LinearLayout>
</ScrollView>

<LinearLayout
    android:id="@+id/buttons"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="bottom"
    android:orientation="horizontal" >

    <Button
        android:id="@+id/save"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Save" />

    <Button
        android:id="@+id/submit"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Submit" />

    <Button
        android:id="@+id/cancel"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Cancel" />

    <Button
        android:id="@+id/delete"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Delete" />

    <Button
        android:id="@+id/reset"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:text="Reset" />
    </LinearLayout>
</LinearLayout>

Answer 1

try this using your parent as RelativeLayout

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

    <LinearLayout
        android:id="@+id/parentlayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="top"
        android:orientation="vertical" >
    </LinearLayout>
</ScrollView>

<LinearLayout
    android:id="@+id/buttons"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_gravity="bottom"
    android:orientation="horizontal" >

    <Button
        android:id="@+id/save"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:text="Save" />

    <Button
        android:id="@+id/submit"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:text="Submit" />

    <Button
        android:id="@+id/cancel"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:text="Cancel" />

    <Button
        android:id="@+id/delete"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:text="Delete" />

    <Button
        android:id="@+id/reset"
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:text="Reset" />
</LinearLayout>

Answer 2

Its better if you use RelativeLayout for this kind of requirements. Would work without hassle.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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:id="@+id/parentlayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="top"
    android:orientation="vertical" >
</LinearLayout>
</ScrollView>

<LinearLayout
android:id="@+id/buttons"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="bottom"
android:layout_alignParentBottom="true"
android:orientation="horizontal" >

<Button
    android:id="@+id/save"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:text="Save" />

<Button
    android:id="@+id/submit"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:text="Submit" />

<Button
    android:id="@+id/cancel"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:text="Cancel" />

<Button
    android:id="@+id/delete"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:text="Delete" />

<Button
    android:id="@+id/reset"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:text="Reset" />
</LinearLayout>
</RelativeLayout>

Answer 3

Just reduce the textsize of the button Text. Since it is not able to display text in one line the margin is getting distorted.

Here I have made textSize to 11dp for each buttontext and the view is perfect for NexusOne size display

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
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:id="@+id/parentlayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="top"
            android:orientation="vertical" >
        </LinearLayout>
    </ScrollView>

    <LinearLayout
        android:id="@+id/buttons"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="bottom"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/save"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Save"
            android:textSize="11dp" />

        <Button
            android:id="@+id/submit"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Submit"
            android:textSize="11dp" />

        <Button
            android:id="@+id/cancel"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Cancel"
            android:textSize="11dp" />

        <Button
            android:id="@+id/delete"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Delete"
            android:textSize="11dp" />

        <Button
            android:id="@+id/reset"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="Reset"
            android:textSize="11dp" />
    </LinearLayout>

</LinearLayout>

Answer 4

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

<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        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:id="@+id/parentlayout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_gravity="top"
                android:orientation="vertical" >
            </LinearLayout>
        </ScrollView>
    </LinearLayout>

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

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

            <LinearLayout
                android:id="@+id/buttons"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="bottom"
                android:orientation="horizontal" >

                <Button
                    android:id="@+id/save"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_weight="1"
                    android:text="Save"
                    android:textSize="12sp" />

                <Button
                    android:id="@+id/submit"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_weight="1"
                    android:text="Submit"
                    android:textSize="12sp" />

                <Button
                    android:id="@+id/cancel"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_weight="1"
                    android:text="Cancel"
                    android:textSize="12sp" />

                <Button
                    android:id="@+id/delete"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_weight="1"
                    android:text="Delete"
                    android:textSize="12sp" />

                <Button
                    android:id="@+id/reset"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_weight="1"
                    android:text="Reset"
                    android:textSize="12sp" />
            </LinearLayout>
        </LinearLayout>
    </FrameLayout>
</FrameLayout>