Day 2 of 100 Days Android

//Android Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="a100dayschallege.inducesmile.com.putextra">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".SecondActivity">
            <action android:name="a100dayschallege.inducesmile.com.putextra.SecondActivity"/>
            <category android:name="android.intent.category.DEFAULT" />


        </activity>
    </application>

</manifest>

//activity_main.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:id="@+id/activity_main"
    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="a100dayschallege.inducesmile.com.putextra.MainActivity">


    <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:onClick="onClick"
        android:text="Sign in"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginBottom="55dp" />

    <TextView
        android:text="Enter Email "
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginLeft="10dp"
        android:layout_marginStart="10dp"
        android:layout_marginTop="35dp"
        android:id="@+id/text_name"
        android:layout_width="match_parent" />

    <EditText
        android:hint="Enter your email hear"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textEmailAddress"
        android:ems="10"
        android:layout_below="@+id/text_name"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:id="@+id/edit_name"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"

        />

    <TextView
        android:text="Enter Password"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/edit_name"
        android:layout_alignLeft="@+id/text_name"
        android:layout_alignStart="@+id/text_name"
        android:layout_marginTop="28dp"
        android:id="@+id/text_surname"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPassword"
        android:ems="10"
        android:layout_below="@+id/text_surname"
        android:layout_alignLeft="@+id/text_surname"
        android:layout_alignStart="@+id/text_surname"
        android:layout_marginTop="27dp"
        android:id="@+id/edit_surname"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

</RelativeLayout>

//MainActivity.java
package a100dayschallege.inducesmile.com.putextra;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


    }
    public void onClick(View view){
        EditText etName1 = (EditText) findViewById(R.id.edit_name);
        EditText etName2 = (EditText) findViewById(R.id.edit_surname);
        Intent intent = new Intent(MainActivity.this, SecondActivity.class);
        intent.putExtra("name", etName1.getText()+" "+etName2.getText());
        startActivity(intent);
    }

}
//secondactivity.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:id="@+id/activity_main"
    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="a100dayschallege.inducesmile.com.putextra.MainActivity">

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:textColor="#0000ff"
        android:textSize="25dp"
        android:text="Welcome !" />


</RelativeLayout>

//SecondActivity.java
package a100dayschallege.inducesmile.com.putextra;

import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
import android.support.v7.app.AppCompatActivity;
/**
 * Created by SAM on 12/8/2016.
 */

public class SecondActivity extends AppCompatActivity
{
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.secondactivity);
        TextView txtView = (TextView) findViewById(R.id.textView1);
        Intent intent = getIntent();
        Bundle bd = intent.getExtras();
        if (bd != null) {
            String getName = (String) bd.get("name");
            txtView.setText(getName);
        }
    }

    }