Relative Layout

Relative Layout enables you to specify how child views are positioned relative to each other. The position of each view can be specified as relative to sibling elements or relative to the parent.

 Important attributed for Relative Layout:

Attribute
Description
android:id
This is the ID which uniquely identifies the layout.
android:gravity
This specifies how an object should position its content, on both X and Y axis. Possible values are top, bottom, left, right, center, center_horizontal, center_vertical etc.
android:ignoreGravity
This indicates what view should not be affected by gravity.

By Relative Layout, you can align two elements by right border, or make one below another, centered in the screen, centeref left, and so on. Bydefault, all the child views are drawn at the top-left of the layout. So must define the positionof each view using the various layout parameters such as android:layout_above, android:layout_below, android:layout_alignTop, android:layout_alignBottom, android:layout_alignLeft, android:layout_alignRight and so on..

For example, following is the content of activity_main.xml containing RelativeLayout

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/RelativeLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="17dp"
        android:ems="10"
        android:hint="Enter name:" />
    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText1"
        android:layout_centerVertical="true"
        android:layout_marginLeft="50dp"
        android:text="Button" />
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/editText1"
        android:layout_marginLeft="22dp"
        android:layout_marginTop="31dp"
        android:text="TextView" />
    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/textView1"
        android:layout_alignBottom="@+id/textView1"
        android:layout_alignRight="@+id/editText1"
        android:text="TextView" />
    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/button1"
        android:layout_alignRight="@+id/textView2"
        android:layout_marginBottom="36dp"
        android:layout_marginRight="14dp"
        android:text="This is example of Relative Layout" />
</RelativeLayout>

Write following in your MainActivity's onCreate()

 SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MMMM-yyyy");
Date date = new Date();

String nowDate = dateFormat.format(date);
TextView dateView = (TextView) findViewById(R.id.textView1);
dateView.setText(nowDate);

SimpleDateFormat timeFormat = new SimpleDateFormat("hh:mm");
String nowTime = timeFormat.format(date);
TextView timeView = (TextView) findViewById(R.id.textView2);
timeView.setText(nowTime);

Output

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