LAB MANUAL MOBILE APPLICATION DEVELOPMENT LAB

LAB MANUAL

MOBILE

APPLICATION

DEVELOPMENT

LAB

Practical No. 1

Create “Hello World” application to display “Hello World” in the middle of the

screen in red colour with white background.

XML File :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"

android:background="#EBECEF"

android:textAlignment="center"

tools:context=".MainActivity">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_above="@+id/practical1"

android:layout_alignParentEnd="true"

android:layout_marginTop="78dp"

android:layout_marginEnd="59dp"

android:layout_marginBottom="120dp"

android:paddingLeft="3dp"

android:paddingTop="10dp"

android:paddingEnd="10dp"

android:paddingRight="3dp"

android:text="Crate Hello world application.. "

android:textColor="#050505"

android:textSize="20dp"

android:textStyle="bold" />

<TextView

android:id="@+id/practical1index"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_above="@+id/practical1"

android:layout_alignParentEnd="true"

android:layout_marginEnd="160dp"

android:layout_marginBottom="244dp"

android:background="@color/white"

android:paddingLeft="3dp"

android:paddingTop="5dp"

android:paddingRight="3dp"

android:text="Practical 1"

android:textColor="#535252"

android:textSize="20dp"

android:textStyle="bold" />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="122dp"

android:layout_marginBottom="189dp"

android:onClick="practical2"

android:text="back to index" />

<EditText

android:id="@+id/editTextTextPersonName3"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:ems="10"

android:inputType="textPersonName"

android:text="Hello World "

android:textColor="#A31212" />

" />

</RelativeLayout>

Java File :

package com.example.practicalbook;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

public void practical2(View view) {

Intent intent = new Intent(this,index.class);

startActivity(intent);

}

Output :

Practical No. 2

Create sample application with login module. (Check username and password),

validate it for login screen or alert the user with a Toast.

XML File :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"

android:background="@color/background"

tools:context=".practical2">

<TextView

android:id="@+id/practical1index"

android:layout_width="wrap_content"

android:layout_height="44dp"

android:layout_alignParentEnd="true"

android:layout_marginTop="10dp"

android:layout_marginEnd="166dp"

android:layout_marginBottom="244dp"

android:background="@color/white"

android:paddingLeft="3dp"

android:paddingTop="10dp"

android:paddingRight="3dp"

android:text=" Practical 2 "

android:textColor="#535252"

android:textSize="18dp"

android:textStyle="bold" />

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_marginTop="78dp"

android:layout_marginEnd="83dp"

android:layout_marginBottom="120dp"

android:paddingLeft="3dp"

android:paddingEnd="10dp"

android:paddingRight="3dp"

android:text="Enter the Username,Email,Password"

android:textSize="15dp"

android:textStyle="bold" />

<LinearLayout

android:layout_width="394dp"

android:layout_height="256dp"

android:layout_alignParentStart="true"

android:layout_alignParentTop="true"

android:layout_marginStart="10dp"

android:layout_marginTop="135dp"

android:layout_marginEnd="10dp"

android:background="@color/teal_200"

android:gravity="center"

android:orientation="vertical">

<EditText

android:id="@+id/PersonName"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:layout_marginStart="10dp"

android:layout_marginTop="5dp"

android:layout_marginEnd="10dp"

android:ems="10"

android:hint="enter the username"

android:inputType="textPersonName"

android:minHeight="48dp"

android:padding="5dp"

<EditText

android:id="@+id/Personemailid"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginStart="10dp"

android:layout_marginTop="5dp"

android:layout_marginEnd="10dp"

android:ems="10"

android:hint="enter the email"

android:inputType="textPersonName"

android:minHeight="48dp"

android:padding="5dp"

android:paddingLeft="5dp"

android:paddingTop="5dp"

<EditText

android:id="@+id/Personpassword"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginStart="10dp"

android:layout_marginTop="5dp"

android:layout_marginEnd="10dp"

android:ems="10"

android:hint="enter the password"

android:inputType="textPersonName"

android:minHeight="48dp"

android:padding="5dp"

android:paddingLeft="5dp"

android:paddingTop="5dp"

<EditText

android:id="@+id/Personconformpassword"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginStart="10dp"

android:layout_marginTop="5dp"

android:layout_marginEnd="10dp"

android:ems="10"

android:hint="Re-enter the password"

android:inputType="textPersonName"

android:minHeight="48dp"

android:padding="5dp"

android:paddingLeft="5dp"

android:paddingTop="5dp"

</LinearLayout>

<Button

android:id="@+id/submitdata"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentStart="true"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginStart="163dp"

android:layout_marginEnd="157dp"

android:layout_marginBottom="235dp"

android:text="submit">

</Button>

</RelativeLayout>

Java File :

package com.example.practicalbook;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

public class practical2 extends AppCompatActivity {

EditText username,email, password, reenterpassword;

Button submit;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_practical2);

username= (EditText) findViewById(R.id.PersonName);

email= (EditText) findViewById(R.id.Personemailid);

password= (EditText) findViewById(R.id.Personpassword);

reenterpassword= (EditText) findViewById(R.id.Personconformpassword);

submit = (Button) findViewById(R.id.submitdata);

//after submit button press

submit.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

String name =username.getText().toString();

String useremail =email.getText().toString();

String pass =password.getText().toString();

String confpass =reenterpassword.getText().toString();

Intent intent = new

Intent(getApplicationContext(),userdatapractical2.class);

intent.putExtra("name",name);

intent.putExtra("email",useremail);

intent.putExtra("password",pass);

intent.putExtra("conformpassword",confpass);

startActivity(intent);

}

});

}

Output :

Practical No. 3

Create and validate a login application using username as Email ID else login

button must remain disabled.

XML File :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"

android:background="@color/background"

tools:context=".practical3">

<TextView

android:id="@+id/practical1index"

android:layout_width="wrap_content"

android:layout_height="44dp"

android:layout_alignParentEnd="true"

android:layout_marginTop="10dp"

android:layout_marginEnd="166dp"

android:layout_marginBottom="244dp"

android:background="@color/white"

android:paddingLeft="3dp"

android:paddingTop="10dp"

android:paddingRight="3dp"

android:text=" Practical 3 "

android:textColor="#535252"

android:textSize="18dp"

android:textStyle="bold" />

<TextView

android:layout_width="395dp"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_marginTop="78dp"

android:layout_marginEnd="0dp"

android:layout_marginBottom="120dp"

android:paddingLeft="3dp"

android:paddingEnd="10dp"

android:paddingRight="3dp"

android:text="Enter the Username,Email,Password with Validations"

android:textSize="15dp"

android:textStyle="bold" />

<LinearLayout

android:layout_width="394dp"

android:layout_height="256dp"

android:layout_alignParentStart="true"

android:layout_alignParentTop="true"

android:layout_marginStart="10dp"

android:layout_marginTop="135dp"

android:layout_marginEnd="10dp"

android:background="@color/teal_200"

android:gravity="center"

android:orientation="vertical">

<EditText

android:id="@+id/PersonName"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:layout_marginStart="10dp"

android:layout_marginTop="5dp"

android:layout_marginEnd="10dp"

android:ems="10"

android:hint="enter the username"

android:inputType="textPersonName"

android:minHeight="48dp"

android:padding="5dp"

<EditText

android:id="@+id/Personemailid"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginStart="10dp"

android:layout_marginTop="5dp"

android:layout_marginEnd="10dp"

android:ems="10"

android:hint="enter the email"

android:inputType="textPersonName"

android:minHeight="48dp"

android:padding="5dp"

android:paddingLeft="5dp"

android:paddingTop="5dp"

<EditText

android:id="@+id/Personpassword"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginStart="10dp"

android:layout_marginTop="5dp"

android:layout_marginEnd="10dp"

android:ems="10"

android:hint="enter the password"

android:inputType="textPersonName"

android:minHeight="48dp"

android:padding="5dp"

android:paddingLeft="5dp"

android:paddingTop="5dp"

<EditText

android:id="@+id/Personconformpassword"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginStart="10dp"

android:layout_marginTop="5dp"

android:layout_marginEnd="10dp"

android:ems="10"

android:hint="Re-enter the password"

android:inputType="textPersonName"

android:minHeight="48dp"

android:padding="5dp"

android:paddingLeft="5dp"

android:paddingTop="5dp"

</LinearLayout>

<Button

android:id="@+id/submitdata"

android:layout_width="141dp"

android:layout_height="wrap_content"

android:layout_alignParentStart="true"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginStart="151dp"

android:layout_marginEnd="135dp"

android:layout_marginBottom="235dp"

android:layout_centerHorizontal="true"

android:text="submit">

</Button>

</RelativeLayout>

Java File :

package com.example.practicalbook;

import android.os.Bundle;

import android.util.Patterns;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.basgeekball.awesomevalidation.AwesomeValidation;

import com.basgeekball.awesomevalidation.ValidationStyle;

import com.basgeekball.awesomevalidation.utility.RegexTemplate;

public class practical3 extends AppCompatActivity {

EditText Username,Email, Password, Reenterpassword;

Button submit;

AwesomeValidation awesomeValidation;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_practical3);

Username = (EditText) findViewById(R.id.PersonName);

Email = (EditText) findViewById(R.id.Personemailid);

Password = (EditText) findViewById(R.id.Personpassword);

Reenterpassword = (EditText)

findViewById(R.id.Personconformpassword);

submit = (Button) findViewById(R.id.submitdata);

if (Username.getText().toString().isEmpty()){

submit.setEnabled(true);

}

awesomeValidation = new AwesomeValidation(ValidationStyle.BASIC);

awesomeValidation.addValidation(this,R.id.PersonName,

RegexTemplate.NOT_EMPTY,R.string.invalid_username);

awesomeValidation.addValidation(this,R.id.Personemailid,

Patterns.EMAIL_ADDRESS,R.string.invalid_email);

awesomeValidation.addValidation(this,R.id.Personpassword,".{6,}",R.string.inv

alid_password);

awesomeValidation.addValidation(this,R.id.Personconformpassword,R.id.Personpa

ssword,R.string.invalid_conform_password);

submit.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

if (awesomeValidation.validate()) {

Toast.makeText(getApplicationContext(), "form validation

successful", Toast.LENGTH_SHORT).show();

} else {

Toast.makeText(getApplicationContext(), "validation

failed", Toast.LENGTH_SHORT).show();

}

});

}

Output :

Practical No. 4

Create a Login application and open a browser with any one search engine.

XML File :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"

android:background="@color/background"

tools:context=".practical4">

<TextView

android:id="@+id/practical1index"

android:layout_width="wrap_content"

android:layout_height="44dp"

android:layout_alignParentEnd="true"

android:layout_marginTop="10dp"

android:layout_marginEnd="166dp"

android:layout_marginBottom="244dp"

android:background="@color/white"

android:paddingLeft="3dp"

android:paddingTop="10dp"

android:paddingRight="3dp"

android:text=" Practical 4 "

android:textColor="#535252"

android:textSize="18dp"

android:textStyle="bold" />

<TextView

android:layout_width="343dp"

android:layout_height="52dp"

android:layout_alignParentStart="true"

android:layout_alignParentTop="true"

android:layout_alignParentEnd="true"

android:layout_marginStart="35dp"

android:layout_marginTop="111dp"

android:layout_marginEnd="33dp"

android:paddingLeft="3dp"

android:paddingEnd="10dp"

android:paddingRight="3dp"

android:text="Enter the Username, Password.\nThen go to the Browser

that you want"

android:textColor="@color/black"

android:textSize="15dp"

android:textStyle="bold" />

<LinearLayout

android:layout_width="402dp"

android:layout_height="130dp"

android:layout_alignParentStart="true"

android:layout_alignParentTop="true"

android:layout_marginStart="10dp"

android:layout_marginTop="185dp"

android:layout_marginEnd="10dp"

android:background="@color/teal_200"

android:gravity="center"

android:orientation="vertical">

<EditText

android:id="@+id/editTextTextPersonName"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:ems="10"

android:layout_marginStart="10dp"

android:layout_marginEnd="5dp"

android:hint="Username"

android:inputType="textPersonName"

android:textColor="#0d0707" />

<EditText

android:id="@+id/editTextPersonpassword"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:ems="10"

android:layout_marginStart="10dp"

android:layout_marginEnd="5dp"

android:hint="Password"

android:inputType="textPersonName"

android:textColor="#0d0707" />

<Button

android:id="@+id/button"

android:layout_marginStart="75dp"

android:layout_marginEnd="75dp"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:onClick="enter"

android:text="Enter" />

</LinearLayout>

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="122dp"

android:layout_marginBottom="189dp"

android:onClick="BACKTOINDEX3"

android:text="back to index" />

</RelativeLayout>

XML File 2 :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"

android:background="@color/background"

android:gravity="center"

tools:context=".bwindow">

<TextView

android:layout_width="337dp"

android:layout_height="40dp"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="59dp"

android:layout_marginBottom="557dp"

android:paddingStart="20dp"

android:text="which browser you want to select:"

android:textColor="@color/black"

android:textSize="12dp">

</TextView>

<Button

android:id="@+id/googleweb"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentStart="true"

android:layout_alignParentTop="true"

android:layout_alignParentEnd="true"

android:layout_marginStart="24dp"

android:layout_marginTop="259dp"

android:layout_marginEnd="16dp"

android:text="google">

</Button>

<Button

android:id="@+id/braveweb"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentStart="true"

android:layout_alignParentTop="true"

android:layout_alignParentEnd="true"

android:layout_marginStart="24dp"

android:layout_marginTop="312dp"

android:layout_marginEnd="16dp"

android:text="brave">

</Button>

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="122dp"

android:layout_marginBottom="123dp"

android:onClick="bti4"

android:text="back to index" />

</RelativeLayout>

Java File :

package com.example.practicalbook;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class practical4 extends AppCompatActivity {

private EditText username, password;

private Button enter;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_practical4);

username= (EditText) findViewById(R.id.editTextTextPersonName);

password= (EditText) findViewById(R.id.editTextPersonpassword);

enter = (Button) findViewById(R.id.button);

enter.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

validate(username.getText().toString()

,password.getText().toString());

}

});

}

private void validate(String uname,String upass){

if (uname.equals("admin") && upass.equals("12345")){

Intent intent = new Intent(practical4.this,bwindow.class);

startActivity(intent);

}else {

Toast.makeText(this, "Enter the given details",

Toast.LENGTH_SHORT).show();

}

public void BACKTOINDEX3(View view) {

Intent intent = new Intent(this,index.class);

startActivity(intent);

}

Java File 2 :

package com.example.practicalbook;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;

import android.net.Uri;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.ImageView;

public class bwindow extends AppCompatActivity {

Button google, brave;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_bwindow);

google =findViewById(R.id.googleweb);

brave =findViewById(R.id.braveweb);

google.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

gotourl("https://www.google.co.in/");

}

private void gotourl(String s) {

Uri uri= Uri.parse(s);

startActivity(new Intent(Intent.ACTION_VIEW,uri));

}

});

brave.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

gotourl("https://brave.com/en-in/");

}

private void gotourl(String s) {

Uri uri= Uri.parse(s);

startActivity(new Intent(Intent.ACTION_VIEW,uri));

}

});

}

public void bti4(View view) {

Intent intent = new Intent(this,index.class);

startActivity(intent);

}

Output :

Practical No. 5

Create an application to change screen colour as per the user choice from a

menu.

XML File :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"

android:id="@+id/rr"

android:background="@color/background"

tools:context=".practical5">

<TextView

android:layout_width="wrap_content"

android:layout_height="44dp"

android:layout_alignParentEnd="true"

android:layout_marginTop="10dp"

android:layout_marginEnd="166dp"

android:layout_marginBottom="244dp"

android:background="@color/white"

android:paddingLeft="3dp"

android:paddingTop="10dp"

android:text=" Practical 5 "

android:textColor="#535252"

android:textSize="18dp"

android:textStyle="bold" />

<TextView

android:layout_width="match_parent"

android:layout_height="75dp"

android:layout_alignParentEnd="true"

android:layout_marginTop="78dp"

android:layout_marginEnd="0dp"

android:layout_marginBottom="120dp"

android:paddingLeft="3dp"

android:paddingEnd="10dp"

android:paddingRight="3dp"

android:paddingStart="20dp"

android:textColor="@color/black"

android:text="Changing the background colour with given

options.\n\nThe options are:"

android:textSize="15dp"

android:textStyle="bold" />

<TextView

android:id="@+id/whiteclr"

android:layout_width="match_parent"

android:layout_height="41dp"

android:layout_alignParentBottom="true"

android:layout_marginBottom="325dp"

android:background="@color/white"

android:gravity="center"

android:text="White"

android:layout_marginEnd="100dp"

android:layout_marginStart="100dp"

android:textColor="@color/black"

android:textSize="20dp">

</TextView>

<TextView

android:id="@+id/blackcolor"

android:layout_width="match_parent"

android:layout_height="41dp"

android:layout_alignParentBottom="true"

android:layout_marginBottom="380dp"

android:background="@color/black"

android:gravity="center"

android:text="Black"

android:layout_marginEnd="100dp"

android:layout_marginStart="100dp"

android:textColor="@color/white"

android:textSize="20dp">

</TextView>

<TextView

android:id="@+id/purpleclr"

android:layout_width="match_parent"

android:layout_height="41dp"

android:layout_alignParentBottom="true"

android:layout_marginBottom="271dp"

android:background="@color/purple_500"

android:gravity="center"

android:text="Purple"

android:layout_marginEnd="100dp"

android:layout_marginStart="100dp"

android:textColor="@color/white"

android:textSize="20dp">

</TextView>

<TextView

android:id="@+id/greenclr"

android:layout_width="match_parent"

android:layout_height="41dp"

android:layout_alignParentBottom="true"

android:layout_marginBottom="218dp"

android:background="@color/teal_200"

android:gravity="center"

android:text="Green"

android:layout_marginEnd="100dp"

android:layout_marginStart="100dp"

android:textColor="@color/white"

android:textSize="20dp">

</TextView>

<TextView

android:id="@+id/bluecolor"

android:layout_width="match_parent"

android:layout_height="41dp"

android:layout_alignParentBottom="true"

android:layout_marginBottom="434dp"

android:background="@color/blue"

android:gravity="center"

android:text="Blue"

android:layout_marginEnd="100dp"

android:layout_marginStart="100dp"

android:textColor="@color/white"

android:textSize="20dp">

</TextView>

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="122dp"

android:layout_marginBottom="140dp"

android:onClick="practical5"

android:text="back to index" />

</RelativeLayout>

Java File :

package com.example.practicalbook;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.RelativeLayout;

import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class practical5 extends AppCompatActivity {

TextView blue,black,white,green,purple;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_practical5);

//layout id

final RelativeLayout relativeLayout;

relativeLayout =findViewById(R.id.rr);

blue = findViewById(R.id.bluecolor);

black = findViewById(R.id.blackcolor);

white = findViewById(R.id.whiteclr);

green = findViewById(R.id.greenclr);

purple = findViewById(R.id.purpleclr);

//methods are to change back ground color....

blue.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

relativeLayout.setBackgroundResource(R.color.blue);

}

});

black.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

relativeLayout.setBackgroundResource(R.color.black);

}

});

green.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

relativeLayout.setBackgroundResource(R.color.teal_200);

}

});

white.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

relativeLayout.setBackgroundResource(R.color.white);

}

});

purple.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

relativeLayout.setBackgroundResource(R.color.purple_500);

}

});

}

public void practical5(View view) {

Intent intent = new Intent(this,index.class);

startActivity(intent);

}

Output :

Practical No. 6

Create a background application that will open activity on specific time.

XML File :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"

android:background="@color/background"

tools:context=".practical6">

<TextView

android:id="@+id/practical1index"

android:layout_width="wrap_content"

android:layout_height="44dp"

android:layout_alignParentEnd="true"

android:layout_marginTop="10dp"

android:layout_marginEnd="166dp"

android:layout_marginBottom="244dp"

android:background="@color/white"

android:paddingLeft="3dp"

android:paddingTop="10dp"

android:paddingRight="3dp"

android:text=" Practical 6 "

android:textColor="#535252"

android:textSize="18dp"

android:textStyle="bold" />

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_marginTop="78dp"

android:layout_marginEnd="113dp"

android:layout_marginBottom="120dp"

android:paddingLeft="3dp"

android:paddingEnd="10dp"

android:paddingRight="3dp"

android:text="Open activity for specific time"

android:textSize="15dp"

android:textStyle="bold" />

<Button

android:id="@+id/button3"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="93dp"

android:layout_marginBottom="352dp"

android:onClick="bckactivity"

android:text="background activity" />

</RelativeLayout>

Java File :

package com.example.practicalbook;

import android.annotation.SuppressLint;

import android.app.AlarmManager;

import android.app.PendingIntent;

import android.content.Context;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import androidx.appcompat.app.AppCompatActivity;

public class practical6 extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_practical6);

}

@SuppressLint("ShortAlarm")

public void bckactivity(View view) {

Intent intent= new Intent(this,backgroundprocess.class);

intent.setAction("backprocess");

@SuppressLint("UnspecifiedImmutableFlag") PendingIntent

pendingIntent=PendingIntent.getBroadcast(this,0,intent,0);

AlarmManager alarmManager =(AlarmManager)

getSystemService(Context.ALARM_SERVICE);

alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,0,10,pendingIntent);

finish();

}

Output :

Practical No. 7

Create spinner with strings from the resource folder . On changing spinner

value, change image.

XML File :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"

android:background="@color/background"

tools:context=".practical7">

<TextView

android:id="@+id/practical1index"

android:layout_width="wrap_content"

android:layout_height="44dp"

android:layout_alignParentEnd="true"

android:layout_marginTop="10dp"

android:layout_marginEnd="166dp"

android:layout_marginBottom="244dp"

android:background="@color/white"

android:paddingLeft="3dp"

android:paddingTop="10dp"

android:paddingRight="3dp"

android:text=" Practical 7 "

android:textColor="#535252"

android:textSize="18dp"

android:textStyle="bold" />

<TextView

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_marginTop="78dp"

android:layout_marginEnd="0dp"

android:layout_marginBottom="120dp"

android:paddingLeft="3dp"

android:paddingEnd="10dp"

android:paddingRight="3dp"

android:padding="3dp"

android:text="Create a spinner that that take value from the resource

file."

android:textSize="15dp"

android:textStyle="bold" />

<TextView

android:id="@+id/selectmenu"

android:layout_width="225dp"

android:layout_height="45dp"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="126dp"

android:layout_marginBottom="487dp"

android:paddingTop="5dp"

android:text="Select Image Name."

android:textColor="@color/black"

android:textSize="20dp">

</TextView>

<ImageView

android:id="@+id/imageView"

android:layout_width="wrap_content"

android:layout_height="129dp"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="89dp"

android:layout_marginBottom="268dp"

app:srcCompat="@drawable/google" />

<Spinner

android:id="@+id/spinner"

android:layout_width="66dp"

android:layout_height="50dp"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="85dp"

android:layout_marginBottom="486dp"></Spinner>

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="122dp"

android:layout_marginBottom="123dp"

android:onClick="btn"

android:text="back to index" />

</RelativeLayout>

Java File :

package com.example.practicalbook;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.ImageView;

import android.widget.Spinner;

import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class practical7 extends AppCompatActivity {

Spinner spinner;

ImageView imageView;

ArrayAdapter arrayAdapter;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_practical7);

spinner=findViewById(R.id.spinner);

imageView = findViewById(R.id.imageView);

arrayAdapter=ArrayAdapter.createFromResource(this,R.array.spinner_array,

androidx.appcompat.R.layout.support_simple_spinner_dropdown_item);

arrayAdapter.setDropDownViewResource(androidx.appcompat.R.layout.support_simp

le_spinner_dropdown_item);

spinner.setAdapter(arrayAdapter);

spinner.setOnItemSelectedListener(new

AdapterView.OnItemSelectedListener() {

@Override

public void onItemSelected(AdapterView<?> parent, View view, int

i, long l) {

switch(i) { case 0 :

imageView.setImageResource(R.drawable.google);break;

case 1 :

imageView.setImageResource(R.drawable.bing);break;

case 2 :

imageView.setImageResource(R.drawable.brave);break;

case 3 :

imageView.setImageResource(R.drawable.operamini);break;

default:

Toast.makeText(practical7.this, "invalid choice.",

Toast.LENGTH_SHORT).show();

}

});

}

@Override

public void onNothingSelected(AdapterView<?> adapterView) {

}

public void btn(View view) {

Intent intent = new Intent(this,index.class);

startActivity(intent);

}

Output :

Practical No. 8

Create an UI listing the engineering branches. If user selects a branch name,

display the number of semesters and subjects in each semester.

XML File :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"

android:background="@color/background"

tools:context=".practical8">

<TextView

android:id="@+id/practical1index"

android:layout_width="wrap_content"

android:layout_height="44dp"

android:layout_alignParentEnd="true"

android:layout_marginTop="10dp"

android:layout_marginEnd="166dp"

android:layout_marginBottom="244dp"

android:background="@color/white"

android:paddingLeft="3dp"

android:paddingTop="10dp"

android:paddingRight="3dp"

android:text=" Practical 8 "

android:textColor="#535252"

android:textSize="18dp"

android:textStyle="bold" />

<TextView

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_marginTop="78dp"

android:layout_marginEnd="0dp"

android:layout_marginBottom="120dp"

android:paddingLeft="3dp"

android:paddingEnd="10dp"

android:paddingRight="3dp"

android:padding="3dp"

android:text=" Design for Engineering course structure "

android:textSize="15dp"

android:textStyle="bold" />

<LinearLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:orientation="vertical"

android:layout_centerInParent="true"

android:paddingStart="19dp"

android:paddingEnd="19dp">

<Button

android:id="@+id/cs"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="computer science"

android:onClick="cc"/>

<Button

android:id="@+id/mech"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="mechanical"

android:onClick="mech"/>

<Button

android:id="@+id/ece"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="electrical"

android:onClick="ece"/>

<Button

android:id="@+id/civil"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="civil"

android:onClick="civil"/>

</LinearLayout>

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="122dp"

android:layout_marginBottom="189dp"

android:onClick="btindex"

android:text="back to index" />

</RelativeLayout>

Java File :

package com.example.practicalbook;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import androidx.appcompat.app.AppCompatActivity;

public class practical8 extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_practical8);

}

public void cc(View view) {

Intent intent = new Intent(this,computerengg.class);

startActivity(intent);

}

public void mech(View view) {

Intent intent = new Intent(this,Mech.class);

startActivity(intent);

}

public void ece(View view) { Intent intent = new Intent(this,ece.class);

startActivity(intent);

}

public void civil(View view) {

Intent intent = new Intent(this,civil.class);

startActivity(intent);

}

public void btindex(View view) {

Intent intent = new Intent(this,index.class);

startActivity(intent);

}

XML Civil File : 
<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout 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:background="@color/background" 
android:layout_height="match_parent" 
tools:context=".civil"> 
 
<TextView 
android:layout_width="398dp" 
android:layout_height="wrap_content" 
android:layout_alignParentTop="true" 
android:layout_alignParentEnd="true" 
android:layout_marginTop="67dp" 
android:layout_marginEnd="13dp" 
android:paddingStart="10dp" 
android:text="  CIVIL ENGINEERING" 
android:textColor="@color/black" 
android:textSize="35dp" /> 
 
<TextView 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:text="Fields will be added soon.." 
android:layout_centerInParent="true" 
android:textSize="25dp" 
android:textColor="#CFC465"/> 
 
</RelativeLayout> 
 
 
XML ECE File : 
<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout 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" 
android:background="@color/background" 
tools:context=".ece"> 
<TextView 
android:layout_width="wrap_content" 
android:layout_height="98dp" 
android:layout_alignParentTop="true" 
android:layout_alignParentEnd="true" 
android:layout_marginTop="67dp" 
android:layout_marginEnd="87dp" 
android:paddingStart="10dp" 
android:text=" ELECTRICAL\nENGINEERING" 
android:textColor="@color/black" 
android:textSize="35dp" /> 
<TextView 

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Fields will be added soon.."

android:layout_centerInParent="true"

android:textSize="25dp"

android:textColor="#CFC465"/>

</RelativeLayout>

XML CSE File :

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout 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"

android:background="@color/background"

android:orientation="vertical"

android:layout_margin="30dp"

tools:context=".computerengg">

<TextView

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="COMPUTER SCIENCE ENGINEERING"

android:textAlignment="center"

android:textSize="40dp"/>

<Spinner

android:id="@+id/SPN1"

android:layout_width="match_parent"

android:layout_height="wrap_content"/>

<Spinner

android:id="@+id/SPN2"

android:layout_width="match_parent"

android:layout_height="wrap_content"/>

<Spinner

android:id="@+id/SPN3"

android:layout_width="match_parent"

android:layout_height="wrap_content"/>

<Spinner

android:id="@+id/SPN4"

android:layout_width="match_parent"

android:layout_height="wrap_content" />

<Spinner

android:id="@+id/SPN5"

android:layout_width="match_parent"

android:layout_height="wrap_content"/>

<Spinner

android:id="@+id/SPN6"

android:layout_width="match_parent"

android:layout_height="wrap_content"/>

</LinearLayout>

XML MECH File :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"

android:background="@color/background"

tools:context=".Mech">

<TextView

android:layout_width="wrap_content"

android:layout_height="98dp"

android:layout_alignParentTop="true"

android:layout_alignParentEnd="true"

android:layout_marginTop="67dp"

android:layout_marginEnd="87dp"

android:paddingStart="10dp"

android:text="MECHANICAL\nENGINEERING"

android:textColor="@color/black"

android:textSize="35dp" />

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Fields will be added soon.."

android:layout_centerInParent="true"

android:textSize="25dp"

android:textColor="#CFC465"/>

</RelativeLayout>

Java Civil File :

package com.example.practicalbook;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

public class civil extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_civil);

}

Java ECE File :

package com.example.practicalbook;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

public class ece extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_ece);

}

Java CSE File :

package com.example.practicalbook;

import android.os.Bundle;

import android.view.View;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.Spinner;

import androidx.appcompat.app.AppCompatActivity;

public class computerengg extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

Spinner spn1,spn2,spn3,spn4, spn5,spn6;

ArrayAdapter adapter1, adapter2, adapter3, adapter4, adapter5,

adapter6;

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_computerengg);

spn1 = findViewById(R.id.SPN1);

spn2 = findViewById(R.id.SPN2);

spn3 = findViewById(R.id.SPN3);

spn4 = findViewById(R.id.SPN4);

spn5 = findViewById(R.id.SPN5);

spn6 = findViewById(R.id.SPN6);

//adapter 1

adapter1 =

ArrayAdapter.createFromResource(this,R.array.sem1,

androidx.appcompat.R.layout.support_simple_spinner_dropdown_item);

adapter1.setDropDownViewResource(androidx.appcompat.R.layout.support_simple_s

pinner_dropdown_item);

spn1.setAdapter(adapter1);

spn1.setOnItemSelectedListener(new

AdapterView.OnItemSelectedListener() {

@Override

public void onItemSelected(AdapterView<?> parent, View view, int

position, long id) {

spn1.setSelection(0);

});

}

@Override

public void onNothingSelected(AdapterView<?> parent) {

}

//adapter 2

adapter2 =

ArrayAdapter.createFromResource(this,R.array.sem2,

androidx.appcompat.R.layout.support_simple_spinner_dropdown_item);

adapter2.setDropDownViewResource(androidx.appcompat.R.layout.support_simple_s

pinner_dropdown_item);

spn2.setAdapter(adapter2);

spn2.setOnItemSelectedListener(new

AdapterView.OnItemSelectedListener() {

@Override

public void onItemSelected(AdapterView<?> parent, View view, int

position, long id) {

spn2.setSelection(0);

});

}

@Override

public void onNothingSelected(AdapterView<?> parent) {

}

//adapter3

adapter3 =

ArrayAdapter.createFromResource(this,R.array.sem3,

androidx.appcompat.R.layout.support_simple_spinner_dropdown_item);

adapter3.setDropDownViewResource(androidx.appcompat.R.layout.support_simple_s

pinner_dropdown_item);

spn3.setAdapter(adapter3);

spn3.setOnItemSelectedListener(new

AdapterView.OnItemSelectedListener() {

@Override

public void onItemSelected(AdapterView<?> parent, View view, int

position, long id) {

spn3.setSelection(0);

}

@Override

public void onNothingSelected(AdapterView<?> parent) {

}

});

//adapter4

adapter4 =

ArrayAdapter.createFromResource(this,R.array.sem4,

androidx.appcompat.R.layout.support_simple_spinner_dropdown_item);

adapter4.setDropDownViewResource(androidx.appcompat.R.layout.support_simple_s

pinner_dropdown_item);

spn4.setAdapter(adapter4);

spn4.setOnItemSelectedListener(new

AdapterView.OnItemSelectedListener() {

@Override

public void onItemSelected(AdapterView<?> parent, View view, int

position, long id) {

spn4.setSelection(0);

});

}

@Override

public void onNothingSelected(AdapterView<?> parent) {

}

//adapter5

adapter5 =

ArrayAdapter.createFromResource(this,R.array.sem5,

androidx.appcompat.R.layout.support_simple_spinner_dropdown_item);

adapter5.setDropDownViewResource(androidx.appcompat.R.layout.support_simple_s

pinner_dropdown_item);

spn5.setAdapter(adapter5);

spn5.setOnItemSelectedListener(new

AdapterView.OnItemSelectedListener() {

@Override

public void onItemSelected(AdapterView<?> parent, View view, int

position, long id) {

spn5.setSelection(0);

});

}

@Override

public void onNothingSelected(AdapterView<?> parent) {

}

adapter6 =

ArrayAdapter.createFromResource(this,R.array.sem6,

androidx.appcompat.R.layout.support_simple_spinner_dropdown_item);

adapter6.setDropDownViewResource(androidx.appcompat.R.layout.support_simple_s

pinner_dropdown_item);

spn6.setAdapter(adapter6);

spn6.setOnItemSelectedListener(new

AdapterView.OnItemSelectedListener() {

@Override

public void onItemSelected(AdapterView<?> parent, View view, int

position, long id) {

spn6.setSelection(0);

}

@Override

public void onNothingSelected(AdapterView<?> parent) {

}

});

}

Java Mech. File :

package com.example.practicalbook;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

public class Mech extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_mech);

}

Output :

Practical No. 9

Create an application that will create database to store username and

password.

XML File :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"

android:background="@color/background"

tools:context=".practical9">

<TextView

android:id="@+id/practical1index"

android:layout_width="wrap_content"

android:layout_height="44dp"

android:layout_alignParentEnd="true"

android:layout_marginTop="10dp"

android:layout_marginEnd="159dp"

android:layout_marginBottom="244dp"

android:background="@color/white"

android:paddingLeft="3dp"

android:paddingTop="10dp"

android:paddingRight="3dp"

android:text=" Practical 9 "

android:textColor="#535252"

android:textSize="18dp"

android:textStyle="bold" />

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_marginTop="78dp"

android:layout_marginEnd="48dp"

android:layout_marginBottom="120dp"

android:paddingStart="10dp"

android:paddingLeft="3dp"

android:paddingEnd="10dp"

android:paddingRight="3dp"

android:text="Store the Username,Password in Database"

android:textColor="@color/black"

android:textSize="15dp"

android:textStyle="bold" />

<LinearLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:layout_marginStart="60dp"

android:orientation="vertical">

<EditText

android:id="@+id/editTextTextPersonName2"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:ems="10"

android:hint="Enter username"

android:inputType="textPersonName"

<EditText

android:id="@+id/editTextTextPassword"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:ems="10"

android:hint="Enter password"

android:inputType="textPassword" />

<Button

android:id="@+id/enterdta"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:padding="8dp"

android:onClick="enter"

android:text="enter"/>

</LinearLayout>

</RelativeLayout>

Java File 1

package com.example.practicalbook;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.google.firebase.database.DatabaseReference;

import com.google.firebase.database.FirebaseDatabase;

public class practical9 extends AppCompatActivity {

EditText username,password;

Button enter;

DatabaseReference Studentdb;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_practical9);

username =(EditText) findViewById(R.id.editTextTextPersonName2);

password =(EditText) findViewById(R.id.editTextTextPassword);

enter =(Button) findViewById(R.id.enterdta);

Studentdb =

FirebaseDatabase.getInstance().getReference().child("students");

enter.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

insertdata();

Intent intent =new

Intent(getApplicationContext(),practical9output.class);

startActivity(intent);

}

});

}

private void insertdata(){

String Username = username.getText().toString();

String Password = password.getText().toString();

studata Studata =new studata(Username,Password);

Studentdb.push().setValue(Studata);

Toast.makeText(this, "data inserted..", Toast.LENGTH_SHORT).show();

}

Java File 2

package com.example.practicalbook;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import androidx.appcompat.app.AppCompatActivity;

public class practical9output extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_practical9output);

}

public void Bti9(View view) {

Intent intent = new Intent(this,index.class);

startActivity(intent);

}

Output :

Realtime database

Data inserting window Data inserted window

Practical No. 10

Create an application to call a phone number entered by the user in the Edit text

box.

XML File :

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"

android:background="@color/background"

tools:context=".practical10">

<TextView

android:id="@+id/practical1index"

android:layout_width="wrap_content"

android:layout_height="44dp"

android:layout_alignParentEnd="true"

android:layout_marginTop="10dp"

android:layout_marginEnd="166dp"

android:layout_marginBottom="244dp"

android:background="@color/white"

android:paddingLeft="3dp"

android:paddingTop="10dp"

android:paddingRight="3dp"

android:text=" Practical 10 "

android:textColor="#535252"

android:textSize="18dp"

android:textStyle="bold" />

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_marginTop="78dp"

android:layout_marginEnd="58dp"

android:layout_marginBottom="120dp"

android:paddingLeft="3dp"

android:paddingEnd="10dp"

android:paddingRight="3dp"

android:text="App for calling the entered phone number."

android:textSize="15dp"

android:textStyle="bold" />

<EditText

android:id="@+id/phonenumber"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_alignParentStart="true"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginStart="113dp"

android:layout_marginEnd="66dp"

android:layout_marginBottom="442dp"

android:hint="Enter The Number" />

<ImageButton

android:id="@+id/imageButton"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="311dp"

android:layout_marginBottom="438dp"

android:rotationX="176"

app:srcCompat="@android:drawable/ic_menu_call" />

<Button

android:id="@+id/callnumber"

android:layout_width="243dp"

android:layout_height="wrap_content"

android:layout_alignParentEnd="true"

android:layout_alignParentBottom="true"

android:layout_marginEnd="66dp"

android:layout_marginBottom="353dp"

android:text="call" />

<TextView

android:id="@+id/textView2"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentBottom="true"

android:layout_marginBottom="103dp"

android:text="This is ' THE END ' of project."

android:textSize="30dp"

android:textStyle="bold"

android:layout_marginStart="12dp"

android:textColor="@color/black"/>

</RelativeLayout>

Java File

package com.example.practicalbook;

import android.Manifest;

import android.content.Intent;

import android.content.pm.PackageManager;

import android.net.Uri;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import androidx.core.app.ActivityCompat;

public class practical10 extends AppCompatActivity {

EditText phone;

Button call;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_practical10);

phone= (EditText) findViewById(R.id.phonenumber);

call=(Button) findViewById(R.id.callnumber);

call.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

Intent intent= new Intent(Intent.ACTION_CALL);

String number=phone.getText().toString();

if (number.trim().isEmpty()){

Toast.makeText(practical10.this, "Please enter the

number.", Toast.LENGTH_SHORT).show();

}

else{

intent.setData(Uri.parse("tel:"+number));

}

(ActivityCompat.checkSelfPermission(getApplicationContext(),

Manifest.permission.CALL_PHONE)!= PackageManager.PERMISSION_GRANTED){

Toast.makeText(practical10.this, "Please Grant the

permissions", Toast.LENGTH_SHORT).show();

request();

}

else {

startActivity(intent);

}

});

}

private void request(){

ActivityCompat.requestPermissions(practical10.this,new

String[]{Manifest.permission.CALL_PHONE},1);

}

Output :

Phone number dialing pad Calling