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Android App Practical Examples

The document describes the code for 3 activities - MainActivity, SecondActivity and their XML layout files. MainActivity has a button that takes the number entered in an edit text and passes it to SecondActivity via an intent extra. SecondActivity retrieves the number from the intent extra, calculates its factorial in a for loop and displays the result in a text view. The activities demonstrate passing data between activities via intents and extras, and performing calculations on passed data in the receiving activity.

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atharvabutte03
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80 views4 pages

Android App Practical Examples

The document describes the code for 3 activities - MainActivity, SecondActivity and their XML layout files. MainActivity has a button that takes the number entered in an edit text and passes it to SecondActivity via an intent extra. SecondActivity retrieves the number from the intent extra, calculates its factorial in a for loop and displays the result in a text view. The activities demonstrate passing data between activities via intents and extras, and performing calculations on passed data in the receiving activity.

Uploaded by

atharvabutte03
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Practical No 18

Q1.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".MainActivity">

<EditText
android:layout_width="162dp"
android:layout_height="48dp"
android:ems="10"
android:inputType="textPersonName"
android:singleLine="false"
android:text="Atharva Butte"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />

<LinearLayout
android:layout_width="279dp"
android:layout_height="410dp"
android:layout_marginTop="160dp"
android:orientation="vertical"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">

<EditText
android:id="@+id/textfld"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="text" />

<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="10dp"
android:text="Navigate" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.java
package com.example.practical18;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.*;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button b = findViewById(R.id.btn);
EditText e = findViewById(R.id.textfld);
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_VIEW,
Uri.parse(e.getText().toString()));
startActivity(intent);
}
});
}
}

Q2.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".MainActivity">

<EditText
android:layout_width="162dp"
android:layout_height="48dp"
android:ems="10"
android:inputType="textPersonName"
android:singleLine="false"
android:text="Atharva Butte"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />

<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Open Dialer"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.java
package com.example.practical18;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.*;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button b = findViewById(R.id.btn);
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTIO
N_DIAL);
startActivity(intent);
}
});
}
}

Q3.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".MainActivity">

<EditText
android:layout_width="162dp"
android:layout_height="48dp"
android:ems="10"
android:inputType="textPersonName"
android:singleLine="false"
android:text="Atharva Butte"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />

<LinearLayout
android:layout_width="279dp"
android:layout_height="410dp"
android:layout_marginTop="160dp"
android:orientation="vertical"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">

<EditText
android:id="@+id/textfld"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:inputType="number" />

<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="10dp"
android:text="Find Factorial" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.java
package com.example.practical18;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.*;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button b = findViewById(R.id.btn);
EditText e = findViewById(R.id.textfld);
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,SecondActivity.class);
intent.putExtra("num",Integer.parseInt(e.getText().toString()));
startActivity(intent);
}
});
}
}

activity_second.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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=".SecondActivity">
<TextView
android:id="@+id/ans"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="24sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="@+id/editTextTextPersonName"
android:layout_width="162dp"
android:layout_height="48dp"
android:ems="10"
android:inputType="textPersonName"
android:singleLine="false"
android:text="Atharva Butte"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

SecondActivity.java
package com.example.practical18;

import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.EditText;
import android.widget.TextView;

public class SecondActivity extends AppCompatActivity {


@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
Intent intent = getIntent();
int fact = 1;
int num = intent.getIntExtra("num",0);
for (int i = 1; i <=num; i++) {
fact *= i;
}
TextView e = findViewById(R.id.ans);
e.setText("factorial is "+fact);
}
}

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