Android 把按钮放在我最后一个屁股的底部

我很难将我的按钮与“登录密码”的底部对齐 我试过endOf，但它根本不起作用，在父对象的底部对齐，但似乎都不起作用。我尝试使用边距将其移动到底部，但它只是打破了用户名文本框。我遇到的问题有什么解决办法吗

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/myBlue"
    android:orientation="vertical"
    android:gravity="center"
    tools:context="com.vice.jake.ric.fads.view.activites.MainActivity">
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:adjustViewBounds="true"
        android:layout_toStartOf="@id/relativelayout1"
        android:layout_marginBottom="275dp"
        android:id="@+id/relativelayout1">

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:src="@drawable/logov3_4" />

    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_centerVertical="true"
        android:id="@+id/relativelayout2">

        <EditText
            android:id="@+id/login_username"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_alignParentEnd="true"
            android:background="@drawable/luxx_edittext"
            android:drawableStart="@drawable/ic_person_outline_black_24dp"
            android:drawablePadding="15dp"
            android:hint="Username"
            android:padding="16dp" />
        <EditText
            android:id="@+id/login_password"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentEnd="true"
            android:layout_marginTop="112dp"
            android:background="@drawable/luxx_edittext"
            android:drawableStart="@drawable/ic_lock_outline_black_24dp"
            android:drawablePadding="15dp"
            android:hint="Password"
            android:padding="16dp" />

        <Button
            android:id="@+id/button_redirect_register"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/holo_red_light"
            android:layout_toEndOf="@id/login_password"
            android:text="REGISTER"
            android:textColor="@color/ghostWhiteColor" />

    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:id="@+id/label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Don't have an Account? Create one!"
            android:textColor="@color/ghostWhiteColor"
            android:layout_centerHorizontal="true"
            android:padding="20dp"
            android:layout_alignParentBottom="true"/>

    </RelativeLayout>
 </RelativeLayout>

---

您可以使用

线性布局

而不是

相对布局

---

您可以使用

线性布局

而不是

相对布局

试试这个

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorAccent"
    android:gravity="center"
    android:orientation="vertical">




        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_marginBottom="275dp"

            android:src="@drawable/places_ic_search" />


        <LinearLayout
            android:id="@+id/relativelayout2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:orientation="vertical">


            <EditText
                android:id="@+id/login_username"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:layout_centerVertical="true"
                android:background="@color/colorAccent"
                android:drawablePadding="15dp"
                android:drawableStart="@drawable/places_ic_clear"
                android:hint="Username"
                android:padding="16dp" />

            <EditText
                android:id="@+id/login_password"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:background="@color/colorPrimary"
                android:drawablePadding="15dp"
                android:drawableStart="@drawable/places_ic_clear"
                android:hint="Password"
                android:padding="16dp" />

            <Button
                android:id="@+id/button_redirect_register"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_toEndOf="@id/login_password"
                android:background="@color/colorAccent"
                android:text="REGISTER"
                android:textColor="#ff00" />

        </LinearLayout>


        <TextView
            android:id="@+id/label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            android:padding="20dp"
            android:text="Don't have an Account? Create one!"
            android:textColor="#ff00" />


    </RelativeLayout>

输出

试试这个

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorAccent"
    android:gravity="center"
    android:orientation="vertical">




        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_marginBottom="275dp"

            android:src="@drawable/places_ic_search" />


        <LinearLayout
            android:id="@+id/relativelayout2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:orientation="vertical">


            <EditText
                android:id="@+id/login_username"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:layout_centerVertical="true"
                android:background="@color/colorAccent"
                android:drawablePadding="15dp"
                android:drawableStart="@drawable/places_ic_clear"
                android:hint="Username"
                android:padding="16dp" />

            <EditText
                android:id="@+id/login_password"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_alignParentEnd="true"
                android:background="@color/colorPrimary"
                android:drawablePadding="15dp"
                android:drawableStart="@drawable/places_ic_clear"
                android:hint="Password"
                android:padding="16dp" />

            <Button
                android:id="@+id/button_redirect_register"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_toEndOf="@id/login_password"
                android:background="@color/colorAccent"
                android:text="REGISTER"
                android:textColor="#ff00" />

        </LinearLayout>


        <TextView
            android:id="@+id/label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_centerHorizontal="true"
            android:padding="20dp"
            android:text="Don't have an Account? Create one!"
            android:textColor="#ff00" />


    </RelativeLayout>

输出

您可以使用android:layout\u-to-endof来代替

将此视图的上边缘定位在给定的定位点视图ID下方。
容纳此视图的上边缘和定位视图的下边缘

最后

<Button
            android:id="@+id/button_redirect_register"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/holo_red_light"
            android:layout_below="@id/login_password"
            android:text="REGISTER"
            android:textColor="@color/ghostWhiteColor" />


您可以使用android:layout\u-to-endof来代替

将此视图的上边缘定位在给定的定位点视图ID下方。
容纳此视图的上边缘和定位视图的下边缘

最后

<Button
            android:id="@+id/button_redirect_register"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/holo_red_light"
            android:layout_below="@id/login_password"
            android:text="REGISTER"
            android:textColor="@color/ghostWhiteColor" />

您应该使用下面的布局来对齐密码字段下面的按钮。我已经重新格式化了您的代码，添加了密码字段

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/lightBlue"
    android:orientation="vertical"
    android:gravity="center"
    tools:context="com.vice.jake.ric.fads.view.activites.MainActivity">


    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:adjustViewBounds="true"
        android:layout_toStartOf="@id/relativelayout1"
        android:layout_marginBottom="275dp"
        android:id="@+id/relativelayout1">

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:src="@drawable/ic_about" />


    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_centerVertical="true"
        android:id="@+id/relativelayout2">


        <EditText
            android:id="@+id/login_username"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"

            android:layout_alignParentEnd="true"
            android:background="@drawable/luxx_edittext"
            android:drawableStart="@drawable/ic_person_outline_black_24dp"
            android:drawablePadding="15dp"
            android:hint="Username"
            android:padding="16dp" />
        <EditText
            android:id="@+id/login_password"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentEnd="true"
            android:layout_marginTop="112dp"
            android:background="@drawable/luxx_edittext"
            android:drawableStart="@drawable/ic_lock_outline_black_24dp"
            android:drawablePadding="15dp"
            android:hint="Password"
            android:padding="16dp" />

        <Button
            android:id="@+id/button_redirect_register"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/holo_red_light"
            android:layout_below="@id/login_password"
            android:layout_marginTop="5dp"
            android:text="REGISTER"
            android:textColor="@color/ghostWhiteColor" />

    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:id="@+id/label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Don't have an Account? Create one!"
            android:textColor="@color/ghostWhiteColor"
            android:layout_centerHorizontal="true"
            android:padding="20dp"
            android:layout_alignParentBottom="true"/>

    </RelativeLayout>


</RelativeLayout>

您应该使用下面的布局来对齐密码字段下面的按钮。我已经重新格式化了您的代码，添加了密码字段

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/lightBlue"
    android:orientation="vertical"
    android:gravity="center"
    tools:context="com.vice.jake.ric.fads.view.activites.MainActivity">


    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:adjustViewBounds="true"
        android:layout_toStartOf="@id/relativelayout1"
        android:layout_marginBottom="275dp"
        android:id="@+id/relativelayout1">

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:src="@drawable/ic_about" />


    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_centerVertical="true"
        android:id="@+id/relativelayout2">


        <EditText
            android:id="@+id/login_username"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"

            android:layout_alignParentEnd="true"
            android:background="@drawable/luxx_edittext"
            android:drawableStart="@drawable/ic_person_outline_black_24dp"
            android:drawablePadding="15dp"
            android:hint="Username"
            android:padding="16dp" />
        <EditText
            android:id="@+id/login_password"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentEnd="true"
            android:layout_marginTop="112dp"
            android:background="@drawable/luxx_edittext"
            android:drawableStart="@drawable/ic_lock_outline_black_24dp"
            android:drawablePadding="15dp"
            android:hint="Password"
            android:padding="16dp" />

        <Button
            android:id="@+id/button_redirect_register"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/holo_red_light"
            android:layout_below="@id/login_password"
            android:layout_marginTop="5dp"
            android:text="REGISTER"
            android:textColor="@color/ghostWhiteColor" />

    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:id="@+id/label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Don't have an Account? Create one!"
            android:textColor="@color/ghostWhiteColor"
            android:layout_centerHorizontal="true"
            android:padding="20dp"
            android:layout_alignParentBottom="true"/>

    </RelativeLayout>


</RelativeLayout>


试试这个

 <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#f6faf7"
    android:gravity="center"
    android:orientation="vertical">


    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:gravity="center"
            android:orientation="vertical">

            <RelativeLayout
                android:id="@+id/relativelayout1"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginBottom="275dp"
                android:layout_toStartOf="@id/relativelayout1"
                android:adjustViewBounds="true">

                <ImageView
                    android:id="@+id/imageView"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignParentTop="true" />


            </RelativeLayout>

            <RelativeLayout
                android:id="@+id/relativelayout2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:orientation="vertical">


                <EditText
                    android:id="@+id/login_username"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignParentEnd="true"

                    android:layout_centerVertical="true"
                    android:drawablePadding="15dp"
                    android:hint="Username"
                    android:padding="16dp" />

                <EditText
                    android:id="@+id/login_password"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignParentEnd="true"
                    android:layout_marginTop="112dp"
                    android:drawablePadding="15dp"
                    android:hint="Password"
                    android:padding="16dp" />

                <Button
                    android:id="@+id/button_redirect_register"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/login_password"
                    android:text="REGISTER" />

            </RelativeLayout>

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <TextView
                    android:id="@+id/label"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentBottom="true"
                    android:layout_centerHorizontal="true"
                    android:padding="20dp"
                    android:text="Don't have an Account? Create one!" />

            </RelativeLayout>
        </LinearLayout>
    </ScrollView>

</RelativeLayout>



你的输出是这样的。。
试试这个

 <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#f6faf7"
    android:gravity="center"
    android:orientation="vertical">


    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center"
            android:gravity="center"
            android:orientation="vertical">

            <RelativeLayout
                android:id="@+id/relativelayout1"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginBottom="275dp"
                android:layout_toStartOf="@id/relativelayout1"
                android:adjustViewBounds="true">

                <ImageView
                    android:id="@+id/imageView"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignParentTop="true" />


            </RelativeLayout>

            <RelativeLayout
                android:id="@+id/relativelayout2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_centerVertical="true"
                android:orientation="vertical">


                <EditText
                    android:id="@+id/login_username"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignParentEnd="true"

                    android:layout_centerVertical="true"
                    android:drawablePadding="15dp"
                    android:hint="Username"
                    android:padding="16dp" />

                <EditText
                    android:id="@+id/login_password"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_alignParentEnd="true"
                    android:layout_marginTop="112dp"
                    android:drawablePadding="15dp"
                    android:hint="Password"
                    android:padding="16dp" />

                <Button
                    android:id="@+id/button_redirect_register"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@+id/login_password"
                    android:text="REGISTER" />

            </RelativeLayout>

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent">

                <TextView
                    android:id="@+id/label"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentBottom="true"
                    android:layout_centerHorizontal="true"
                    android:padding="20dp"
                    android:text="Don't have an Account? Create one!" />

            </RelativeLayout>
        </LinearLayout>
    </ScrollView>

</RelativeLayout>



你的输出是这样的。。
试试这个：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/main_relative"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <RelativeLayout
        android:id="@+id/container_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ScrollView
            android:id="@+id/scrollView"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <RelativeLayout
                android:id="@+id/second_container_layout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">


                <LinearLayout
                    android:id="@+id/card_linearLayout"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="vertical"
                    android:paddingBottom="50dp">




                    <RelativeLayout
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:adjustViewBounds="true"
                        android:layout_toStartOf="@id/relativelayout1"
                        android:layout_marginBottom="275dp"
                        android:id="@+id/relativelayout1">

                        <ImageView
                            android:id="@+id/imageView"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:layout_alignParentTop="true"
                             />


                    </RelativeLayout>

                    <RelativeLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:orientation="vertical"
                        android:layout_centerVertical="true"
                        android:id="@+id/relativelayout2">


                    <EditText
                        android:id="@+id/login_username"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_centerVertical="true"

                        android:layout_alignParentEnd="true"
                        android:background="@drawable/luxx_edittext"
                        android:drawableStart="@drawable/ic_person_outline_black_24dp"
                        android:drawablePadding="15dp"
                        android:hint="Username"
                        android:padding="16dp" />
                    <EditText
                        android:id="@+id/login_password"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_alignParentEnd="true"
                        android:background="@drawable/luxx_edittext"
                        android:drawableStart="@drawable/ic_lock_outline_black_24dp"
                        android:drawablePadding="15dp"
                        android:hint="Password"
                        android:padding="16dp" />

                    <Button
                        android:id="@+id/button_redirect_register"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:background="@color/holo_red_light"
                        android:layout_toEndOf="@id/login_password"
                        android:text="REGISTER"
                        android:textColor="@color/ghostWhiteColor" />


                    <TextView
                        android:layout_width="20dp"
                        android:layout_height="20dp" />

                </LinearLayout>

            </RelativeLayout>


        </ScrollView>


    </RelativeLayout>


    <RelativeLayout
        android:id="@+id/pay_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true">

        <TextView
            android:id="@+id/label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Don't have an Account? Create one!"
            android:textColor="@color/ghostWhiteColor"
            android:layout_centerHorizontal="true"
            android:padding="20dp"
            android:layout_alignParentBottom="true"/>
    </RelativeLayout>


</RelativeLayout>


试试这个：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/main_relative"
    android:layout_width="match_parent"
    android:layout_height="match_parent">


    <RelativeLayout
        android:id="@+id/container_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ScrollView
            android:id="@+id/scrollView"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <RelativeLayout
                android:id="@+id/second_container_layout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">


                <LinearLayout
                    android:id="@+id/card_linearLayout"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:orientation="vertical"
                    android:paddingBottom="50dp">




                    <RelativeLayout
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:adjustViewBounds="true"
                        android:layout_toStartOf="@id/relativelayout1"
                        android:layout_marginBottom="275dp"
                        android:id="@+id/relativelayout1">

                        <ImageView
                            android:id="@+id/imageView"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:layout_alignParentTop="true"
                             />


                    </RelativeLayout>

                    <RelativeLayout
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:orientation="vertical"
                        android:layout_centerVertical="true"
                        android:id="@+id/relativelayout2">


                    <EditText
                        android:id="@+id/login_username"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_centerVertical="true"

                        android:layout_alignParentEnd="true"
                        android:background="@drawable/luxx_edittext"
                        android:drawableStart="@drawable/ic_person_outline_black_24dp"
                        android:drawablePadding="15dp"
                        android:hint="Username"
                        android:padding="16dp" />
                    <EditText
                        android:id="@+id/login_password"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_alignParentEnd="true"
                        android:background="@drawable/luxx_edittext"
                        android:drawableStart="@drawable/ic_lock_outline_black_24dp"
                        android:drawablePadding="15dp"
                        android:hint="Password"
                        android:padding="16dp" />

                    <Button
                        android:id="@+id/button_redirect_register"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:background="@color/holo_red_light"
                        android:layout_toEndOf="@id/login_password"
                        android:text="REGISTER"
                        android:textColor="@color/ghostWhiteColor" />


                    <TextView
                        android:layout_width="20dp"
                        android:layout_height="20dp" />

                </LinearLayout>

            </RelativeLayout>


        </ScrollView>


    </RelativeLayout>


    <RelativeLayout
        android:id="@+id/pay_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true">

        <TextView
            android:id="@+id/label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Don't have an Account? Create one!"
            android:textColor="@color/ghostWhiteColor"
            android:layout_centerHorizontal="true"
            android:padding="20dp"
            android:layout_alignParentBottom="true"/>
    </RelativeLayout>


</RelativeLayout>


试试下面的XML代码

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/myBlue"
    android:orientation="vertical"
    android:gravity="center"
    tools:context="com.vice.jake.ric.fads.view.activites.MainActivity">


    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:adjustViewBounds="true"
        android:layout_toStartOf="@id/relativelayout1"
        android:layout_marginBottom="275dp"
        android:id="@+id/relativelayout1">

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:src="@drawable/logov3_4" />


    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_centerVertical="true"
        android:id="@+id/relativelayout2">


        <EditText
            android:id="@+id/login_username"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"

            android:layout_alignParentEnd="true"
            android:background="@drawable/luxx_edittext"
            android:drawableStart="@drawable/ic_person_outline_black_24dp"
            android:drawablePadding="15dp"
            android:hint="Username"
            android:padding="16dp" />
        <EditText
            android:id="@+id/login_password"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentEnd="true"
            android:layout_marginTop="112dp"
            android:background="@drawable/luxx_edittext"
            android:drawableStart="@drawable/ic_lock_outline_black_24dp"
            android:drawablePadding="15dp"
            android:hint="Password"
            android:padding="16dp" />

        <Button
            android:id="@+id/button_redirect_register"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/holo_red_light"
            android:layout_below="@id/login_password"
            android:text="REGISTER"
            android:textColor="@color/ghostWhiteColor" />

    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Don't have an Account? Create one!"
            android:textColor="@color/ghostWhiteColor"
            android:layout_centerHorizontal="true"
            android:padding="20dp"
            android:layout_alignParentBottom="true"/>

    </RelativeLayout>


</RelativeLayout>



您将得到低于输出的值

试试下面的XML代码

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/myBlue"
    android:orientation="vertical"
    android:gravity="center"
    tools:context="com.vice.jake.ric.fads.view.activites.MainActivity">


    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:adjustViewBounds="true"
        android:layout_toStartOf="@id/relativelayout1"
        android:layout_marginBottom="275dp"
        android:id="@+id/relativelayout1">

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:src="@drawable/logov3_4" />


    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_centerVertical="true"
        android:id="@+id/relativelayout2">


        <EditText
            android:id="@+id/login_username"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"

            android:layout_alignParentEnd="true"
            android:background="@drawable/luxx_edittext"
            android:drawableStart="@drawable/ic_person_outline_black_24dp"
            android:drawablePadding="15dp"
            android:hint="Username"
            android:padding="16dp" />
        <EditText
            android:id="@+id/login_password"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentEnd="true"
            android:layout_marginTop="112dp"
            android:background="@drawable/luxx_edittext"
            android:drawableStart="@drawable/ic_lock_outline_black_24dp"
            android:drawablePadding="15dp"
            android:hint="Password"
            android:padding="16dp" />

        <Button
            android:id="@+id/button_redirect_register"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/holo_red_light"
            android:layout_below="@id/login_password"
            android:text="REGISTER"
            android:textColor="@color/ghostWhiteColor" />

    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Don't have an Account? Create one!"
            android:textColor="@color/ghostWhiteColor"
            android:layout_centerHorizontal="true"
            android:padding="20dp"
            android:layout_alignParentBottom="true"/>

    </RelativeLayout>


</RelativeLayout>



您将得到低于输出的值

您正在将按钮与endOf对齐，endOf表示编辑文本的右侧。您必须在edittext布局下方对齐，如下所示

<Button
            android:id="@+id/button_redirect_register"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/login_password"
            android:text="REGISTER"
            android:textColor="@color/ghostWhiteColor" />



因此，您应该能够看到登录密码下方的按钮
您正在将按钮与endOf对齐，这意味着编辑文本的右侧。您必须在edittext布局下方对齐，如下所示

<Button
            android:id="@+id/button_redirect_register"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/login_password"
            android:text="REGISTER"
            android:textColor="@color/ghostWhiteColor" />

Use Linear Layout(orientation- vertical) with weight when working for Login screen so that it fits fine to all the screen sizes

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/blue"
    android:gravity="center"
    android:orientation="vertical"
    android:weightSum="10">


    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_alignParentTop="true"
        android:layout_weight="2"
        android:src="@drawable/logov3_4" />

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"></View>


    <EditText
        android:id="@+id/login_username"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="@drawable/luxx_edittext"
        android:drawableLeft="@drawable/ic_person_outline_black_24dp"
        android:drawablePadding="15dp"
        android:hint="Username"
        android:padding="16dp" />

    <EditText
        android:id="@+id/login_password"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="@drawable/luxx_edittext"
        android:drawableLeft="@drawable/ic_lock_outline_black_24dp"
        android:drawablePadding="15dp"
        android:hint="Password"
        android:padding="16dp" />

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"></View>

    <Button
        android:id="@+id/button_redirect_register"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="@color/holo_red_light"
        android:text="REGISTER"
        android:textColor="@color/ghostWhiteColor" />

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="2"></View>

    <TextView
        android:id="@+id/label"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:gravity="center"
        android:padding="20dp"
        android:text="Don't have an Account? Create one!"
        android:textColor="@color/ghostWhiteColor" />


</LinearLayout>



因此，在登录屏幕工作时，您应该能够看到登录密码下方的按钮
使用带重量的线性布局（方向-垂直），以便适合所有屏幕大小
Use Linear Layout(orientation- vertical) with weight when working for Login screen so that it fits fine to all the screen sizes

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/blue"
    android:gravity="center"
    android:orientation="vertical"
    android:weightSum="10">


    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_alignParentTop="true"
        android:layout_weight="2"
        android:src="@drawable/logov3_4" />

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"></View>


    <EditText
        android:id="@+id/login_username"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="@drawable/luxx_edittext"
        android:drawableLeft="@drawable/ic_person_outline_black_24dp"
        android:drawablePadding="15dp"
        android:hint="Username"
        android:padding="16dp" />

    <EditText
        android:id="@+id/login_password"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="@drawable/luxx_edittext"
        android:drawableLeft="@drawable/ic_lock_outline_black_24dp"
        android:drawablePadding="15dp"
        android:hint="Password"
        android:padding="16dp" />

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"></View>

    <Button
        android:id="@+id/button_redirect_register"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="@color/holo_red_light"
        android:text="REGISTER"
        android:textColor="@color/ghostWhiteColor" />

    <View
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="2"></View>

    <TextView
        android:id="@+id/label"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:gravity="center"
        android:padding="20dp"
        android:text="Don't have an Account? Create one!"
        android:textColor="@color/ghostWhiteColor" />


</LinearLayout>

在登录屏幕工作时，使用带重量的线性布局（方向-垂直），以便适合所有屏幕大小