简单的RelativeLayout布局

简单的RelativeLayout布局实例

 <?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"
      >

     <TextView
         android:id="@+id/textView1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignParentTop="true"
         android:layout_centerHorizontal="true"
         android:layout_marginTop="20dp"
         android:text="Please input the username and password to log on."
         android:textSize="14sp"
         android:textAppearance="?android:attr/textAppearanceMedium"
         android:layout_marginLeft="20dp"
         android:layout_marginRight="20dp"
         android:layout_marginBottom="20dp"
          />
     <TextView
         android:id="@+id/text_username"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_below="@id/textView1"
         android:layout_alignLeft="@id/textView1"
         android:layout_marginRight="20dp"
         android:text="User Name:"
         android:textSize="20sp"
         android:layout_marginBottom="20dp"
         />

     <EditText
         android:id="@+id/edit_username"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_alignBaseline="@id/text_username"
         android:layout_toRightOf="@id/text_username"
         android:layout_alignRight="@id/textView1"
         android:layout_below="@id/textView1"
         />

     <TextView
         android:id="@+id/text_psw"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_below="@id/text_username"
         android:layout_alignLeft="@id/text_username"
         android:layout_marginRight="20dp"
         android:text="Password"
         android:textSize="20sp"
         />

     <EditText
         android:id="@+id/edit_psw"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignBaseline="@id/text_psw"
         android:layout_alignLeft="@id/edit_username"
         android:layout_alignRight="@id/edit_username"
         android:layout_below="@id/edit_username"
         android:inputType="textPassword" />

     <Button
         android:id="@+id/btn_logon"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignRight="@id/edit_psw"
         android:text="Log in"
         android:textSize="21sp"
         android:layout_below="@id/edit_psw"
         android:layout_marginTop="20dp"
         android:layout_marginLeft="20dp"
         />

     <Button
         android:id="@+id/btn_signin"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignBaseline="@+id/btn_logon"
         android:layout_toLeftOf="@+id/btn_logon"
         android:text="Sign in"
         android:textSize="21sp" />

 </RelativeLayout>