Mobile Application Development Practical 18
Question 1
Write a program to create a text field and a button “Navigate”. When you enter “www.google.com” and press navigate button it should open google page.
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">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/editText"
android:layout_centerHorizontal="true"
android:text="Nevigate" />
<EditText
android:id="@+id/editText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center"
android:ems="10"
android:hint="Enter url" />
</RelativeLayout>
</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.Button;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
EditText ed;
Button b;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ed=findViewById(R.id.editText);
b=findViewById(R.id.button);
View.OnClickListener cl=new View.OnClickListener() {
@Override
public void onClick(View view) {
String url=ed.getText().toString();
Intent i=new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
}
};
b.setOnClickListener(cl);
}
}Output
Question 2
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"?>
<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">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/editText"
android:layout_centerHorizontal="true"
android:text="Start Dialer" />
<EditText
android:id="@+id/editText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center"
android:ems="10"
android:hint="Enter number" />
</RelativeLayout>
</androidx.constraintlayout.widget.ConstraintLayout>MainActivity.java
package com.example.practical18_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 ed;
Button b;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ed=findViewById(R.id.editText);
b=findViewById(R.id.button);
View.OnClickListener cl=new View.OnClickListener() {
@Override
public void onClick(View view) {
String url=ed.getText().toString();
Intent i=new Intent(Intent.ACTION_DIAL);
i.setData(Uri.parse("tel:"+url));
startActivity(i);
}
};
b.setOnClickListener(cl);
}
}Output
Question 3
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
<?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">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/editText"
android:layout_centerHorizontal="true"
android:text="Factorial" />
<EditText
android:id="@+id/editText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center"
android:inputType="number"
android:ems="10"
android:hint="Enter number" />
</RelativeLayout>
</androidx.constraintlayout.widget.ConstraintLayout>activity_factorial.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=".Factorial">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/factorial"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="30dp"/>
</FrameLayout>
</androidx.constraintlayout.widget.ConstraintLayout>MainActivity.java
package com.example.practical18_3;
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 MainActivity extends AppCompatActivity {
EditText ed;
Button b;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ed=findViewById(R.id.editText);
b=findViewById(R.id.button);
View.OnClickListener cl=new View.OnClickListener() {
@Override
public void onClick(View view) {
String str=ed.getText().toString();
Intent i=new Intent(getApplicationContext(),Factorial.class);
i.putExtra("num",str);
startActivity(i);
}
};
b.setOnClickListener(cl);
}
}Factorial.java
package com.example.practical18_3;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
public class Factorial extends AppCompatActivity {
TextView tv;
int fact=1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_factorial);
tv=findViewById(R.id.factorial);
Intent i1=getIntent();
String str=i1.getStringExtra("num");
int n=Integer.parseInt(str);
while(n>=1)
{
fact=fact*n;
n--;
}
tv.setText("Factorial is: "+fact);
}
}Output
