The perfect solution for Android development soft keyboard to block the login button

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/login_bg" > 
<LinearLayout 
android:id="@+id/ll_center"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" > 
<ScrollView 
android:id="@+id/sl_center"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:fadingEdge="none"
android:scrollbars="none" > 
<RelativeLayout 
android:id="@+id/rl_center"
android:layout_width="fill_parent"
android:layout_height="wrap_content" > 
<LinearLayout 
android:id="@+id/sms_login_ll_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="90dip"
android:orientation="horizontal" > 
<ImageView 
android:id="@+id/sms_login_iv_icon"
android:layout_width="70dip"
android:layout_height="70dip"
android:layout_gravity="center_vertical"
android:src="@drawable/login_top_icon" /> 
<ImageView 
android:id="@+id/sms_login_iv_big_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="15dip"
android:src="@drawable/sms_login_icon_big" /> 
</LinearLayout> 
<ImageView 
android:id="@+id/sms_login_iv_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/sms_login_ll_title"
android:layout_centerHorizontal="true"
android:layout_marginTop="28dip"
android:background="@drawable/sms_login_icon_small" /> 
<RelativeLayout 
android:id="@+id/sms_login_rl_input_name"
android:layout_width="fill_parent"
android:layout_height="43dip"
android:layout_below="@id/sms_login_iv_name"
android:layout_centerHorizontal="true"
android:layout_marginLeft="40dip"
android:layout_marginRight="40dip"
android:layout_marginTop="40dip"
android:background="@drawable/login_top_input" > 
<ImageView 
android:id="@+id/sms_login_iv_input_name_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
android:background="@drawable/login_input_icon_user" /> 
<FrameLayout 
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toRightOf="@id/sms_login_iv_input_name_icon" > 
<EditText 
android:id="@+id/sms_login_et_accout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/transparent_white"
android:digits="@string/sms_login_accout_text"
android:hint="请输入账号"
android:singleLine="true"
android:text=""
android:textSize="20sp" /> 
</FrameLayout> 
</RelativeLayout> 
<RelativeLayout 
android:id="@+id/sms_login_rl_input_pass"
android:layout_width="fill_parent"
android:layout_height="43dip"
android:layout_below="@id/sms_login_rl_input_name"
android:layout_centerHorizontal="true"
android:layout_marginLeft="40dip"
android:layout_marginRight="40dip"
android:background="@drawable/login_top_input" > 
<ImageView 
android:id="@+id/sms_login_iv_input_pass_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
android:background="@drawable/login_input_icon_pwd" /> 
<FrameLayout 
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toRightOf="@id/sms_login_iv_input_pass_icon" > 
<EditText 
android:id="@+id/sms_login_et_password"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/transparent_white"
android:digits="@string/sms_et_change_password_old_text"
android:hint="请输入密码"
android:inputType="textPassword"
android:singleLine="true"
android:text=""
android:textSize="20sp" /> 
</FrameLayout> 
</RelativeLayout> 
</RelativeLayout> 
</ScrollView> 
<Button 
android:id="@+id/sms_login_bt_confirm"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@id/sms_login_rl_input_pass"
android:layout_centerHorizontal="true"
android:layout_marginLeft="40dip"
android:layout_marginRight="40dip"
android:layout_marginTop="16dip"
android:background="@drawable/sms_update_pass_bg_selector"
android:text="登 录"
android:textColor="@color/white"
android:textSize="20sp" /> 
</LinearLayout> 
</RelativeLayout>

etAccount = (EditText) this.findViewById(R.id.sms_login_et_accout); 
etAccount.setOnClickListener(this); 
etAccount.setOnTouchListener(new OnTouchListener() { 
@Override
public boolean onTouch(View v, MotionEvent event) { 
changeScrollView(); 
return false; 
} 
}); 
/** 
* 使ScrollView指向底部 
*/
private void changeScrollView(){ 
h.postDelayed(new Runnable() { 
@Override
public void run() { 
sl_center.scrollTo(0, sl_center.getHeight()); 
} 
}, 300); 
} 
Handler h = new Handler(){ 
public void handleMessage(Message msg) { 
}; 
};