right_to_left_layout

  <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/notice_item_tv_time"
            android:layout_alignBottom="@id/notice_item_fl_avatar"
            android:layout_toRightOf="@id/notice_item_fl_avatar"
            android:orientation="horizontal" >

          
            <Button
                android:id="@+id/notice_item_btn_operation"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true"
                android:layout_alignParentBottom="true"
                android:textSize="10dp"
                android:visibility="gone" />
            
              <TextView
                android:id="@+id/notice_item_tv_content"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
               android:layout_toLeftOf="@id/notice_item_btn_operation"
                android:ellipsize="end"
                android:singleLine="true"
                android:text="您有5条评论" />
            
        </RelativeLayout>