Q. Write a program to create a text field and a xmlns:app="http://schemas.android.
com/apk/res-
button “Navigate”. When you enter auto"
“www.google.com” and press navigate button it xmlns:tools="http://schemas.android.com/tools"
should open google page. android:layout_width="match_parent"
android:layout_height="match_parent"
acitivity_main.xml
android:orientation="vertical"
<?xml version="1.0" encoding="utf-8"?> android:gravity="center"
<LinearLayout tools:context=".MainActivity">
xmlns:android="http://schemas.android.com/apk/res
/android" <EditText
xmlns:app="http://schemas.android.com/apk/res- android:layout_width="250dp"
auto" android:layout_height="wrap_content"
xmlns:tools="http://schemas.android.com/tools" android:id="@+id/etxturl"
android:layout_width="match_parent" android:hint="Enter a URL : "
android:layout_height="match_parent" android:layout_margin="40dp"
android:orientation="vertical" android:textSize="24sp"/>
android:gravity="center"
tools:context=".MainActivity"> <Button
android:layout_width="wrap_content"
<EditText android:layout_height="wrap_content"
android:layout_width="250dp" android:layout_margin="40dp"
android:layout_height="wrap_content" android:text="Send"
android:id="@+id/etxturl" android:onClick="send"
android:hint="Enter a URL : " android:textSize="20sp"
android:layout_margin="40dp" />
android:textSize="24sp"/>
</LinearLayout>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="40dp"
android:text="Send"
android:onClick="send"
android:textSize="20sp"
/>
</LinearLayout>
MainAcitivity.java
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res
/android"
Q. Write a program to create button “Start
Dialer”. When u click on this button it should
open the phone dialer.
activity_main.xml
<?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:orientation="vertical"
android:gravity="center"
tools:context=".MainActivity">
<EditText
android:layout_width="250dp"
android:layout_height="wrap_content"
android:id="@+id/etxturl"
android:hint="Enter a Phone no. : "
android:layout_margin="40dp"
android:textSize="24sp"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="40dp"
android:text="Send"
android:onClick="send"
android:textSize="20sp"
/>
</LinearLayout>
MainActivity.java
package com.example.practicalno18_2;
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.EditText;
public class MainActivity extends
AppCompatActivity {
EditText etxturl;
@Override
protected void onCreate(Bundle
savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
etxturl = findViewById(R.id.etxturl);
}
public void send(View view) {
String str = etxturl.getText().toString();
Intent i = new Intent(Intent.ACTION_DIAL);
i.setData(Uri.parse("tel:+91" + str));
startActivity(i);
} Q. Write a program to create two screens. First
} screen will take one number input from user.
After click on Factorial button, second screen will
open and it should display factorial of the same
number. Also specify which type of intent you will
use in this case.
activity_main.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res
/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center"
android:padding="16dp">
<EditText
android:id="@+id/e1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter a number"
android:layout_marginBottom="20dp"
android:inputType="number" /> Toast.makeText(MainActivity.this,
"Please enter a number",
<Button Toast.LENGTH_SHORT).show();
android:id="@+id/fact" } else {
android:background="#ff00ff" int number =
android:layout_width="match_parent" Integer.parseInt(numberStr);
android:layout_height="wrap_content" Intent intent = new
android:text="Factorial" /> Intent(MainActivity.this, ResultActivity.class);
</LinearLayout> intent.putExtra("number", number); //
Pass the number to the second screen
MainActivity.java startActivity(intent); // Navigate to the
package com.example.practicalno18_2; second screen
}
import android.content.Intent; }
import android.os.Bundle; });
import android.view.View; }
import android.widget.Button; }
import android.widget.EditText;
import android.widget.Toast; activity_result.xml
import <LinearLayout
androidx.appcompat.app.AppCompatActivity; xmlns:android="http://schemas.android.com/apk/res
/android"
public class MainActivity extends android:layout_width="match_parent"
AppCompatActivity { android:layout_height="match_parent"
android:orientation="vertical"
EditText inputNumber; android:padding="16dp">
Button factorialButton;
<TextView
@Override android:id="@+id/resultText"
protected void onCreate(Bundle android:layout_width="match_parent"
savedInstanceState) { android:layout_height="wrap_content"
super.onCreate(savedInstanceState); android:textSize="18sp" />
setContentView(R.layout.activity_main); </LinearLayout>
inputNumber = findViewById(R.id.e1); ResultActivity.java
factorialButton = findViewById(R.id.fact);
package com.example.practicalno18_2;
factorialButton.setOnClickListener(new
View.OnClickListener() { import android.os.Bundle;
@Override import android.widget.TextView;
public void onClick(View v) {
String numberStr = import
inputNumber.getText().toString(); androidx.appcompat.app.AppCompatActivity;
if (numberStr.isEmpty()) {
public class ResultActivity extends
AppCompatActivity { android:dataExtractionRules="@xml/data_extractio
n_rules"
TextView resultText;
android:fullBackupContent="@xml/backup_rules"
@Override android:icon="@mipmap/ic_launcher"
protected void onCreate(Bundle android:label="@string/app_name"
savedInstanceState) {
super.onCreate(savedInstanceState); android:roundIcon="@mipmap/ic_launcher_round"
setContentView(R.layout.activity_result); android:supportsRtl="true"
resultText = findViewById(R.id.resultText); android:theme="@style/Theme.PracticalNo18_2"
tools:targetApi="31">
// Retrieve the number passed from <activity
MainActivity android:name=".MainActivity"
int number = getIntent().getIntExtra("number", android:exported="true">
0); <intent-filter>
<action
// Calculate factorial android:name="android.intent.action.MAIN" />
long factorial = calculateFactorial(number); <category
android:name="android.intent.category.LAUNCHE
// Display result R" />
resultText.setText("Factorial of " + number + " </intent-filter>
is: " + factorial); </activity>
} <activity
android:name=".ResultActivity"
private long calculateFactorial(int n) { android:exported="false">
long result = 1; </activity>
for (int i = 1; i <= n; i++) { </application>
result *= i; </manifest>
}
return result;
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest
xmlns:android="http://schemas.android.com/apk/res
/android"
xmlns:tools="http://schemas.android.com/tools">
<application
android:allowBackup="true"
