res/activity_main.xml

gistfile1.txt

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
    tools:context="com.example.apicall.testapp.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Testing HTTP with OK"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.17" />

    <Button
        android:id="@+id/button"
        android:layout_width="234dp"
        android:layout_height="54dp"
        android:text="Http Request"
        tools:layout_editor_absoluteX="78dp"
        tools:layout_editor_absoluteY="181dp" />

    <EditText
        android:id="@+id/editText"
        android:layout_width="232dp"
        android:layout_height="145dp"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="Http Response"
        tools:layout_editor_absoluteX="97dp"
        tools:layout_editor_absoluteY="340dp" />

</android.support.constraint.ConstraintLayout>