Align a button below the bottom of the screen

Question

Currently my code places a button at the bottom of the screen:

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="bottom"
    android:layout_alignParentBottom="true">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:gravity="center|bottom">

        <ImageButton
            android:id="@+id/button1"
            android:layout_width="95dp"
            android:layout_height="95dp"
            android:layout_centerInParent="true"
            android:gravity="center"
            android:src="@drawable/main_button"
            />
    </LinearLayout>
</RelativeLayout>

However, I wish to align it slightly below the bottom of the screen, so a small part of the button is clipped off (Say, 20%). Ultimately, my end result is that when I tap and drag the button up, it will move up and reveal the entire button, but before that, the bottom part of it is clipped.

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There are many questions on how to align a button to the bottom of a screen, but I can't seem to find any that aligns it to below the bottom of the screen.

Is there any way to do so, or am I not using the correct search terms?

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EDIT: From the answers, I tried android:translationY="20dp" and it did not work, but I tried android:layout_marginBottom="-20dp" and it worked for me.

Answer 1

You can add android:translationY="Xdp" to your button to move it down by X dp.

Alternatively you can create two LinearLayouts . One to fill the screen and hold other components and another that contains the button. You can then add android:layout_below="@id/layout0" and android:margin_top="Xdp" to control how far below the screen the layout with the button should be.

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_gravity="bottom"
    android:layout_alignParentBottom="true">

        </LinearLayout android:id="@+id/layout0"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:layout_below="@id/layout0"
            android:margin_top="Xdp"
            android:gravity="center|bottom">

                <ImageButton
                    android:id="@+id/button1"
                    android:layout_width="95dp"
                    android:layout_height="95dp"
                    android:layout_centerInParent="true"
                    android:gravity="center"
                    android:src="@drawable/main_button"/>
       </LinearLayout>
</RelativeLayout>

Answer 2

You can translate the button:

android:translationY="20dp"

in your xml, that's moves the view 20 dp's down.