android - Ordering elements in a layout file -

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i have been trying layout elements such button occupies bottom of screen , remaining elements arranged in successive manner @ top of screen no success. last editext(opedt) showed bit distant others somewhere in middle of screen. changes have them in desired order? here xml layout file:

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"     android:background="@drawable/beezlinkbackg"     android:layout_height="match_parent" android:paddingleft="@dimen/activity_horizontal_margin"     android:paddingright="@dimen/activity_horizontal_margin"     android:paddingtop="@dimen/activity_vertical_margin"     android:paddingbottom="@dimen/activity_vertical_margin"     tools:context="gsie.beezlink.opportunityactivity">      <relativelayout         android:id="@+id/footer"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_alignparentbottom="true"         android:gravity="center" >         <button             android:layout_width= "match_parent"             android:layout_height="wrap_content"             android:text="@string/posterbtn"             android:background="#008000"             android:id="@+id/posterbtn"              />      </relativelayout>      <textview         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/cinteretxt"         android:textsize="20sp"         android:textstyle="bold"         android:id="@+id/cinteretxt"         android:layout_alignparenttop="true"       />      <spinner         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:id="@+id/cinteretspin"         android:layout_below="@+id/cinteretxt"         android:layout_alignparentleft="true"         android:layout_alignparentstart="true" />     <textview         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/optitretxt"         android:textsize="20sp"         android:textstyle="bold"         android:id="@+id/optitretxt"         android:layout_below="@+id/cinteretspin"         />     <edittext         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:id="@+id/optitreedt"         android:layout_below="@+id/optitretxt"         android:hint="@string/hintoptitre"         android:layout_alignparentleft="true"         android:layout_alignparentstart="true" />     <textview         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/optxt"         android:textsize="20sp"         android:textstyle="bold"         android:id="@+id/optxt"         android:layout_below="@+id/optitreedt"         />     <edittext         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:id="@+id/opedt"         android:hint="@string/hintpost"         android:layout_below="@+id/optxt"         android:layout_above="@+id/footer"         android:layout_alignparentleft="true"         android:layout_alignparentstart="true" />  </relativelayout>

edit: looks have awarded points without testing. when type long text in last edittext(opedt),it overlaps button @ bottom. text gets on top of button. want text stop before reaching button , scrolls.

remove relativelayout-wrapper button , add following attribute button: android:layout_alignparentbottom="true"


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