Android Views

TextView

<TextView
    android:text="Shalvin P D 1!"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="56sp"
    android:fontFamily="sans-serif-light"
    android:textColor="@android:color/black"
    android:background="#ccddff"
    android:padding="20dp"/>

LayoutView

<LinearLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

    
    <TextView
    android:text="Shalvin P D 1!"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="56sp"
    android:fontFamily="sans-serif-light"
    android:textColor="@android:color/black"
    android:background="#ccddff"
    android:padding="20dp"/>
    
     <TextView
    android:text="Shalvin P D 2!"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textSize="56sp"
    android:fontFamily="sans-serif-light"
    android:textColor="@android:color/black"
    android:background="#ccddff"
    android:padding="20dp"
   />
    
</LinearLayout>

RelativeLayour

<RelativeLayout 
   android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

        <TextView android:text="Shalvin P D."
           android:layout_width="wrap_content"
           android:textColor="#555555"
            android:layout_height="wrap_content"
           android:layout_alignParentTop="true"
            android:textSize="30sp"/>

        <TextView android:text="Shalvin P D."
            android:layout_width="wrap_content"
            android:textColor="#555555"
            android:layout_alignParentBottom="true"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            />

 </RelativeLayout>

Event Handling

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    tools:context="com.blogspot.shalvinpd.helloevents.MainActivity">

   

    <EditText
        android:id="@+id/etName"
        android:layout_width="wrap_content"
        android:layout_height="40sp" />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello"
        android:id="@+id/btnHello"
        android:onClick="btnHello_Click"
        android:layout_centerVertical="true"
        android:layout_toEndOf="@+id/textView" />


</LinearLayout>

public void btnHello_Click(View view)
    {
        EditText et = (EditText)(findViewById(R.id.etName));
        Toast.makeText(this, "Hello " + et.getText().toString(), Toast.LENGTH_SHORT).show();
    }