activity_post.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.pradeepkumar.adpost.PostActivity">

    <ImageButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/ibImageselect"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:background="#ffffff"
        android:src="@drawable/add_btn"
        android:adjustViewBounds="true"
        android:scaleType="center" />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/Titlefeild"
        android:layout_centerVertical="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="20dp"
        android:layout_marginRight="20dp"
        android:layout_marginBottom="20dp"
        android:padding="5dp"
        android:hint="Post Title"
        android:singleLine="true" />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="textMultiLine"
        android:ems="10"
        android:id="@+id/DescFeild"
        android:layout_below="@+id/Titlefeild"
        android:layout_marginTop="20dp"
        android:layout_marginRight="20dp"
        android:layout_marginBottom="20dp"
        android:layout_alignLeft="@+id/Titlefeild"
        android:layout_alignStart="@+id/Titlefeild"
        android:padding="5dp"
        android:hint="Post Description" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/Submitpost"
        android:layout_alignParentBottom="true"
        android:layout_alignLeft="@+id/DescFeild"
        android:layout_alignStart="@+id/DescFeild"
        android:text="Submit Post"
        android:singleLine="false" />

</RelativeLayout>