<RelativeLayout
                     android:id="@+id/wodeshouchang_layout"
                     android:layout_width="fill_parent"
                     android:layout_height="wrap_content" 
                     android:layout_centerVertical="true"  
>
                     <TextView
                         android:id="@+id/newnumber"
                      android:textSize="20sp"
                      android:layout_alignParentLeft="true"                
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:textColor="#707070"
                      android:layout_marginLeft="15dp
                         android:text="新手机号:" 
                         android:textSize="15sp"
                       android:padding="10dp"
/>
                     <EditText
                      android:textSize="15sp"
                      android:paddingLeft="2dp"
                      android:layout_toRightOf="@id/newnumber"               
                      android:layout_width="fill_parent"
                      android:layout_height="wrap_content"
                      android:layout_marginRight="15dp"
                      android:background = "@drawable/edittext_style"
                      android:textColor="#707070"
                     android:padding="10dp"
                        />
                 </RelativeLayout>
写代码要注意一点,尽量不要指定控件的宽高,你这里可以通过字体大小和margin和padding来控制距离,上面的我没试过,不过应该可以了吧。。