android - Buttons in dialog boxes sticking to the bottom -

i'm building custom dialog box application. while doing so, ok , cancel buttons going right bottom of view i.e. bottom edges of dialog box. how can pull these little there slight gap between buttons , bottom edge of dialog box. xml code follows:

<textview     android:id="@+id/settingsview"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignparenttop="true"     android:layout_centerhorizontal="true"     android:layout_margintop="18dp"     android:text="select settings" />  <radiobutton     android:id="@+id/onemin"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignleft="@+id/settingsview"     android:layout_below="@+id/settingsview"     android:layout_margintop="14dp"     android:text="@string/radio_one" />  <radiobutton     android:id="@+id/twomin"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignleft="@+id/onemin"     android:layout_below="@+id/onemin"     android:text="@string/radio_two" />  <radiobutton     android:id="@+id/tenmins"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignleft="@+id/twomin"     android:layout_below="@+id/twomin"     android:text="@string/radio_three" />  <button     android:id="@+id/set"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignright="@+id/onemin"     android:layout_below="@+id/tenmins"     android:layout_marginright="54dp"     android:layout_margintop="30dp"     android:background="@drawable/custom_btn_livid_brown"     android:text="@string/submit_btn" />  <button     android:id="@+id/cancel"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:layout_alignbaseline="@+id/set"     android:layout_alignbottom="@+id/set"     android:layout_torightof="@+id/twomin"     android:background="@drawable/custom_btn_livid_brown"     android:text="@string/cancel" /> 

have tried using gravities? solution when have trouble positioning widgets.

basically, need parent "container" buttons in , position them changing gravities within container widgets.

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