关于android系统弹出软键盘把界面顶上去的有关问题。在线急等

关于android系统弹出软键盘把界面顶上去的问题。。在线急等！
先看看我的布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/background" >

    <RelativeLayout
        android:id="@+id/top"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:background="@drawable/top" >
 
        <Button
            android:id="@+id/managerKeyButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:layout_marginRight="20dip"
            android:background="@drawable/bnext"
            android:text="@string/geilflowonenext"
            android:textColor="#ffffff"
            android:textSize="15sp" />

        <TextView
            android:id="@+id/showtitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_marginRight="32dp"
            android:layout_toLeftOf="@+id/managerKeyButton"
            android:text="输入管理员密码"
            android:textColor="#ffffff"
            android:textSize="20sp" />

    </RelativeLayout>

    <RelativeLayout
        android:id="@+id/bottom"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:background="@drawable/bottom" >
    </RelativeLayout>
    
<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    >

    <TextView
        android:id="@+id/showinputmanagerpassword"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/top"
        android:layout_marginLeft="40dp"
        android:layout_marginTop="112dp"
        android:text="请输入管理员密码"
        android:textColor="#000000"
        android:textSize="20sp" />

    <EditText
        android:id="@+id/managerkeypasswords"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/showinputmanagerpassword"
        android:layout_below="@+id/showinputmanagerpassword"
        android:layout_marginTop="40dip"
        android:background="@drawable/edittext"
        android:digits="0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
        android:hint="请输入管理员密码"
        android:maxLength="20"