Android Lab file 2 to 12

Q2 A. Develop an Android application that uses GUI components, Font and Colors

android_main.xml :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="30dp"
        android:gravity="center"
        android:text="Hello World!"
        android:textSize="25sp"
        android:textStyle="bold" />

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:gravity="center"
        android:text="Change font size"
        android:textSize="25sp" />
    <Button
        android:id="@+id/button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:gravity="center"
        android:text="Change color"
        android:textSize="25sp" />
</LinearLayout>

MainActivity.java :

package com.example.labfile;

import ndroid.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.graphics.Color;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    int ch=1;
    float font=30;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final TextView t= (TextView) findViewById(R.id.textView);
        Button b1= (Button) findViewById(R.id.button1);
        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                t.setTextSize(font);
                font = font + 5;
                if (font == 50)
                    font = 30;
            }
        });
        Button b2= (Button) findViewById(R.id.button2);
        b2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                switch (ch) {
                    case 1:
                        t.setTextColor(Color.RED);
                        break;
                    case 2:
                        t.setTextColor(Color.GREEN);
                        break;
                    case 3:
                        t.setTextColor(Color.BLUE);
                        break;
                    case 4:
                        t.setTextColor(Color.CYAN);
                        break;
                    case 5:
                        t.setTextColor(Color.YELLOW);
                        break;
                    case 6:
                        t.setTextColor(Color.MAGENTA);
                        break;
                }
                ch++;
                if (ch == 7)
                    ch = 1;
            }
        });
    }
}

Output :

==========================================================================

Q2 B . Develop an Android application that uses Layout Managers and event listeners. Subscription form and Login form

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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="100dp">
        <TextView
            android:id="@+id/textView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="30dp"
            android:text="Details Form"
            android:textSize="25sp"
            android:gravity="center"/>
    </LinearLayout>

    <GridLayout
        android:id="@+id/gridLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="100dp"
        android:layout_marginBottom="200dp"
        android:columnCount="2"
        android:rowCount="3">
        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:layout_row="0"
            android:layout_column="0"
            android:text="Name"
            android:textSize="20sp"
            android:gravity="center"/>

        <EditText
            android:id="@+id/editText"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:layout_row="0"
            android:layout_column="1"
            android:ems="10"/>

        <TextView
           android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:layout_row="1"
            android:layout_column="0"
            android:text="Reg.No"
            android:textSize="20sp"
            android:gravity="center"/>

        <EditText
            android:id="@+id/editText2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:layout_row="1"
            android:layout_column="1"
            android:inputType="number"
            android:ems="10"/>

        <TextView
            android:id="@+id/textView3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:layout_row="2"
            android:layout_column="0"
            android:text="Dept"
            android:textSize="20sp"
            android:gravity="center"/>

        <Spinner
            android:id="@+id/spinner"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:layout_row="2"
            android:layout_column="1"
            android:spinnerMode="dropdown"/>

    </GridLayout>

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerInParent="true"
        android:layout_marginBottom="150dp"
        android:text="Submit"/>

</RelativeLayout>

MainActivity.java :

package com.example.labfile;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.content.Intent;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Spinner;

public class MainActivity extends AppCompatActivity {
    EditText e1,e2;
    Button bt;
    Spinner s;
    String [] dept_array={"CSE","ECE","IT","Mech","Civil"};
    String name,reg,dept;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        e1= (EditText) findViewById(R.id.editText);
        e2= (EditText) findViewById(R.id.editText2);
        bt= (Button) findViewById(R.id.button);
       s= (Spinner) findViewById(R.id.spinner);

        ArrayAdapter adapter= new ArrayAdapter(MainActivity.this,android.R.layout.simple_spinner_item,dept_array);
        s.setAdapter(adapter);

        bt.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                name=e1.getText().toString();
                reg=e2.getText().toString();
                dept=s.getSelectedItem().toString();

                Intent i = new Intent(MainActivity.this,SecondActivity.class);
                i.putExtra("name_key", name);
                i.putExtra("reg_key",reg);
                i.putExtra("dept_key", dept);
                startActivity(i);

            }
        });
    }
}

activity_second.xml :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.labfile.SecondActivity"
    android:orientation="vertical"
    android:gravity="center">

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:text="New Text"
        android:textSize="30sp"/>

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:text="New Text"
        android:textSize="30sp"/>

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="20dp"
        android:text="New Text"
        android:textSize="30sp"/>

</LinearLayout>

SecondActivity.java :

package com.example.labfile;

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

public class SecondActivity extends AppCompatActivity {
    TextView t1,t2,t3;
    String name,reg,dept;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);

        t1= (TextView) findViewById(R.id.textView1);
        t2= (TextView) findViewById(R.id.textView2);
        t3= (TextView) findViewById(R.id.textView3);

        Intent i = getIntent();
        name=i.getStringExtra("name_key");
        reg=i.getStringExtra("reg_key");
        dept=i.getStringExtra("dept_key");

        t1.setText(name);
        t2.setText(reg);
        t3.setText(dept);
    }
}

Output :

==========================================================================

Q3.Create a fragment that has its own UI and enable your activities to communicate with fragments.

Activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical"

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=".MainActivity">

<Button

android:id="@+id/firstFragment"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:background="@color/button_background_color"

android:text="First Fragment"

android:textColor="@color/white"

android:textSize="20sp" />

<Button

android:id="@+id/secondFragment"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginTop="10dp"

android:background="@color/button_background_color"

android:text="Second Fragment"

android:textColor="@color/white"

android:textSize="20sp" />

<FrameLayout

android:id="@+id/frameLayout"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_marginTop="10dp" />

</LinearLayout>

MainActivity.java

package com.abhiandroid.fragmentexample;

import android.app.Fragment;

import android.app.FragmentManager;

import android.app.FragmentTransaction;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

public class MainActivity extends AppCompatActivity {

Button firstFragment, secondFragment;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// get the reference of Button's

firstFragment = (Button) findViewById(R.id.firstFragment);

secondFragment = (Button) findViewById(R.id.secondFragment);

// perform setOnClickListener event on First Button

firstFragment.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// load First Fragment

loadFragment(new FirstFragment());

}

});

// perform setOnClickListener event on Second Button

secondFragment.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// load Second Fragment

loadFragment(new SecondFragment());

}

});

}

private void loadFragment(Fragment fragment) {

// create a FragmentManager

FragmentManager fm = getFragmentManager();

// create a FragmentTransaction to begin the transaction and replace the Fragment

FragmentTransaction fragmentTransaction = fm.beginTransaction();

// replace the FrameLayout with new Fragment

fragmentTransaction.replace(R.id.frameLayout, fragment);

fragmentTransaction.commit(); // save the changes

}

FirstFragment.class

package com.abhiandroid.fragmentexample;

import android.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.Toast;

public class FirstFragment extends Fragment {

View view;

Button firstButton;

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container,

Bundle savedInstanceState) {

// Inflate the layout for this fragment

view = inflater.inflate(R.layout.fragment_first, container, false);

// get the reference of Button

firstButton = (Button) view.findViewById(R.id.firstButton);

// perform setOnClickListener on first Button

firstButton.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// display a message by using a Toast

Toast.makeText(getActivity(), "First Fragment", Toast.LENGTH_LONG).show();

}});

return view;

}}

SecondFragment.class

package com.abhiandroid.fragmentexample;

import android.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.Toast;

public class SecondFragment extends Fragment {

View view;

Button secondButton;

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container,

Bundle savedInstanceState) {

// Inflate the layout for this fragment

view = inflater.inflate(R.layout.fragment_second, container, false);

// get the reference of Button

secondButton = (Button) view.findViewById(R.id.secondButton);

// perform setOnClickListener on second Button

secondButton.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

// display a message by using a Toast

Toast.makeText(getActivity(), "Second Fragment", Toast.LENGTH_LONG).show();

}});

return view;

}}

fragment_first.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="com.abhiandroid.fragmentexample.FirstFragment">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerHorizontal="true"

android:layout_marginTop="100dp"

android:text="This is First Fragment"

android:textColor="@color/black"

android:textSize="25sp" />

<Button

android:id="@+id/firstButton"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:layout_marginLeft="20dp"

android:layout_marginRight="20dp"

android:background="@color/green"

android:text="First Fragment"

android:textColor="@color/white"

android:textSize="20sp"

android:textStyle="bold" />

</RelativeLayout>

SecondActivity.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="com.abhiandroid.fragmentexample.SecondFragment">

<TextView

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerHorizontal="true"

android:layout_marginTop="100dp"

android:text="This is Second Fragment"

android:textColor="@color/black"

android:textSize="25sp" />

<Button

android:id="@+id/secondButton"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:layout_marginLeft="20dp"

android:layout_marginRight="20dp"

android:background="@color/green"

android:text="Second Fragment"

android:textColor="@color/white"

android:textSize="20sp"

android:textStyle="bold" />

</RelativeLayout>

Output :

==========================================================================

Q4. Write an android code to make simple registration page using Intent

activity_main.xml :

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

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent">

<EditText

android:id="@+id/editTextUsername"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:hint="Username"

android:layout_marginTop="20dp"

android:layout_marginHorizontal="20dp"/>

<EditText

android:id="@+id/editTextEmail"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:hint="Email"

android:layout_below="@id/editTextUsername"

android:layout_marginTop="20dp"

android:layout_marginHorizontal="20dp"/>

<EditText

android:id="@+id/editTextPassword"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:hint="Password"

android:inputType="textPassword"

android:layout_below="@id/editTextEmail"

android:layout_marginTop="20dp"

android:layout_marginHorizontal="20dp"/>

<Button

android:id="@+id/btnRegister"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="Register"

android:layout_below="@id/editTextPassword"

android:layout_marginTop="20dp"

android:layout_marginHorizontal="20dp"/>

</RelativeLayout>

MainActivity.java :

package com.example.myapplication;// src/main/java/your_package_name/MainActivity.java

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 MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

// Get the views from the layout

EditText editTextUsername = findViewById(R.id.editTextUsername);

EditText editTextEmail = findViewById(R.id.editTextEmail);

EditText editTextPassword = findViewById(R.id.editTextPassword);

Button btnRegister = findViewById(R.id.btnRegister);

// Set click listener for the Register button

btnRegister.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

// Get the entered values

String username = editTextUsername.getText().toString().trim();

String email = editTextEmail.getText().toString().trim();

String password = editTextPassword.getText().toString().trim();

// Validate and display a toast with registration information

if (!username.isEmpty() && !email.isEmpty() && !password.isEmpty()) {

String registrationInfo = "Username: " + username + "\nEmail: " + email + "\nPassword: " + password;

showToast("Registration successful:\n" + registrationInfo);

} else {

showToast("Please fill in all the fields.");

}

});

}

private void showToast(String message) {

Toast.makeText(this, message, Toast.LENGTH_SHORT).show();

}

Output :

==========================================================================

Q5 . Write an application to demonstrate Alert Dialog Box in android.

activity_main.xml :

MainActivity.java :

package com.example.alertbox;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
    Button b;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        b = (Button) findViewById(R.id.alertBox);
        b.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                builder.setTitle("Alert !");
                builder.setMessage("Do you want to exit ?");
                builder.setPositiveButton("Yes",null)
                        .setNegativeButton("No",null);
                builder.show();
            }
        });
    }
}

Output :

==========================================================================

Q6. Demonstrate Array Adapter using List View to display list of fruits.

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">

<ListView

android:id="@+id/listViewFruits"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:divider="@android:color/darker_gray"

android:dividerHeight="0.5dp"/>

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.java :

package com.example.myapplication;// src/main/java/your_package_name/MainActivity.java

import android.os.Bundle;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import androidx.appcompat.app.AppCompatActivity;

import java.util.ArrayList;

import java.util.Arrays;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

ArrayList<String> fruitsList = new ArrayList<>(Arrays.asList(

"Apple", "Banana", "Orange", "Grapes", "Watermelon", "Mango", "Strawberry", "Pineapple"));

// Create ArrayAdapter

ArrayAdapter<String> arrayAdapter = new ArrayAdapter<>(

this,

android.R.layout.simple_list_item_1,

fruitsList);

ListView listViewFruits = findViewById(R.id.listViewFruits);

listViewFruits.setAdapter(arrayAdapter);

}

Output :

==========================================================================

Q7.Write an application to produce Notification

activity_main.xml :

MainActivity.java :

package com.example.a8;

import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.NotificationCompat;
import androidx.core.app.NotificationManagerCompat;

public class MainActivity extends AppCompatActivity {

    private final String channelId = "notification_channel";
    private final int notificationId = 1;

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

        createNotificationChannel();

        Button showNotificationButton = findViewById(R.id.showNotificationButton);
        showNotificationButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                showNotification();
            }
        });
    }

    private void createNotificationChannel() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            String name = "My Notification Channel";
            String descriptionText = "Channel description";
            int importance = NotificationManager.IMPORTANCE_DEFAULT;
            NotificationChannel channel = new NotificationChannel(channelId, name, importance);
            channel.setDescription(descriptionText);

            NotificationManager notificationManager =
                    (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            notificationManager.createNotificationChannel(channel);
        }
    }

    private void showNotification() {
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, channelId)
                .setSmallIcon(R.drawable.ic_notification)
                .setContentTitle("Notification Example")
                .setContentText("This is an Notification Example.")
                .setPriority(NotificationCompat.PRIORITY_DEFAULT);

        NotificationManagerCompat.from(this).notify(notificationId, builder.build());
    }
}

Output:-

==========================================================================

Q8. Create an application which demonstrate radio button, check button, and Spinner.

Activity_main.xml :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp"
    tools:context=".MainActivity">

    <RadioGroup
        android:id="@+id/radioGroup"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <RadioButton
            android:id="@+id/radioButtonOption1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Option 1" />

        <RadioButton
            android:id="@+id/radioButtonOption2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Option 2" />
    </RadioGroup>

    <CheckBox
        android:id="@+id/checkBox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Check me" />

    <Spinner
       android:id="@+id/spinner"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"/>
</LinearLayout>

MainActivity.java

package com.example.a9;

import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

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

        RadioGroup radioGroup = findViewById(R.id.radioGroup);
        CheckBox checkBox = findViewById(R.id.checkBox);
        Spinner spinner = findViewById(R.id.spinner);

        // Set a listener for RadioGroup
        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                RadioButton radioButton = findViewById(checkedId);
                if (radioButton != null) {
                    showToast("Selected: " + radioButton.getText());
                }
            }
        });

        // Set a listener for CheckBox
        checkBox.setOnClickListener(new View.OnClickListener() {
          @Override
            public void onClick(View v) {
                if (checkBox.isChecked()) {
                    showToast("CheckBox checked");
                } else {
                    showToast("CheckBox unchecked");
                }
            }
        });

        // Populate the Spinner with data
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
                this,
                R.array.spinner_options,
                android.R.layout.simple_spinner_item
        );
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);

        // Set a listener for Spinner
        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
                String selectedOption = (String) parentView.getItemAtPosition(position);
                showToast("Selected Spinner Option: " + selectedOption);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parentView) {
                // Do nothing here
            }
        });
    }

    private void showToast(String message) {
        Toast.makeText(this, message, Toast.LENGTH_LONG).show();
    }
}

strings.xml

<resources>
    <string-array name="spinner_options">
        <item>Option A</item>
        <item>Option B</item>
        <item>Option C</item>
    </string-array>
</resources>

Output:-

==========================================================================

Q9. Design screen to send email (compose email) using linear layout.

Activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20sp"
        android:text="Design screen to send email (compose email) using linear layout.\n" />

    <EditText
        android:id="@+id/recipientEditText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Recipient"
        android:inputType="textEmailAddress" />

    <EditText
        android:id="@+id/subjectEditText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Subject" />

    <MultiAutoCompleteTextView
        android:id="@+id/bodyEditText"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:hint="Email Body"
        android:inputType="textMultiLine" />

    <Button
        android:id="@+id/sendButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Send Email" />

</LinearLayout>

MainActivity.java

package com.example.composeemail;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.MultiAutoCompleteTextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    private EditText recipientEditText, subjectEditText;
    private MultiAutoCompleteTextView bodyEditText;

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

        recipientEditText = findViewById(R.id.recipientEditText);
        subjectEditText = findViewById(R.id.subjectEditText);
        bodyEditText = findViewById(R.id.bodyEditText);

        Button sendButton = findViewById(R.id.sendButton);
        sendButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                sendEmail();
            }
        });
    }

    private void sendEmail() {
        String recipient = recipientEditText.getText().toString();
        String subject = subjectEditText.getText().toString();
        String body = bodyEditText.getText().toString();

        // You can implement the email sending logic here

        String message = "Email Sent!\nRecipient: " + recipient + "\nSubject: " + subject + "\nBody: " + body;
        Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
    }
}

Output :|

==========================================================================

Q10. Create application to demonstrate date and time picker.

Activity_main.xml

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

<RelativeLayout

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent">

<Button

android:id="@+id/btnShowDatePicker"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Show Date Picker"

android:layout_centerHorizontal="true"

android:layout_marginTop="50dp"/>

<Button

android:id="@+id/btnShowTimePicker"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Show Time Picker"

android:layout_below="@id/btnShowDatePicker"

android:layout_centerHorizontal="true"

android:layout_marginTop="20dp"/>

</RelativeLayout>

MainActivity.java :

package com.example.myapplication;// src/main/java/your_package_name/MainActivity.java

import android.app.DatePickerDialog;

import android.app.TimePickerDialog;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.DatePicker;

import android.widget.TimePicker;

import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import java.util.Calendar;

public class MainActivity extends AppCompatActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Button btnShowDatePicker = findViewById(R.id.btnShowDatePicker);

Button btnShowTimePicker = findViewById(R.id.btnShowTimePicker);

btnShowDatePicker.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

showDatePickerDialog();

}

});

btnShowTimePicker.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

showTimePickerDialog();

}

});

}

private void showDatePickerDialog() {

// Get the current date

Calendar calendar = Calendar.getInstance();

int year = calendar.get(Calendar.YEAR);

int month = calendar.get(Calendar.MONTH);

int day = calendar.get(Calendar.DAY_OF_MONTH);

// Create a Date Picker Dialog

DatePickerDialog datePickerDialog = new DatePickerDialog(

this,

new DatePickerDialog.OnDateSetListener() {

@Override

public void onDateSet(DatePicker datePicker, int selectedYear, int selectedMonth, int selectedDay) {

String date = selectedYear + "-" + (selectedMonth + 1) + "-" + selectedDay;

showToast("Selected Date: " + date);

}

year, month, day);

// Show the Date Picker Dialog

datePickerDialog.show();

}

private void showTimePickerDialog() {

Calendar calendar = Calendar.getInstance();

int hour = calendar.get(Calendar.HOUR_OF_DAY);

int minute = calendar.get(Calendar.MINUTE);

// Create a Time Picker Dialog

TimePickerDialog timePickerDialog = new TimePickerDialog(

this,

new TimePickerDialog.OnTimeSetListener() {

@Override

public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) {

String time = selectedHour + ":" + selectedMinute;

showToast("Selected Time: " + time);

}

hour, minute, true); // true for 24-hour format

// Show the Time Picker Dialog

timePickerDialog.show();

}

private void showToast(String message) {

Toast.makeText(this, message, Toast.LENGTH_SHORT).show();

}

Output :

==========================================================================

Q11 . Design screen for payment board and display message on button click.

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">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="443dp"
        android:layout_height="247dp"
        android:layout_marginTop="2dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/paypal" />

    <TextView
        android:id="@+id/textView"
      android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Card Number :"
        android:textSize="20sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.175"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.414"
        tools:ignore="TouchTargetSizeCheck" />

    <EditText
        android:id="@+id/editText"
        android:layout_width="300dp"
        android:layout_height="40dp"
        android:layout_marginStart="49dp"
        android:layout_marginTop="14dp"
        android:layout_marginEnd="62dp"
        android:hint="Enter card number"
        android:inputType="number"
        android:textSize="18sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView"
        tools:ignore="TouchTargetSizeCheck" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="24dp"
        android:layout_marginEnd="250dp"
        android:text="Expiry Date :"
        android:textSize="20sp"
        android:textStyle="bold"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="1.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editText" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="170dp"
        android:layout_height="39dp"
        android:layout_marginStart="17dp"
        android:layout_marginTop="24dp"
        android:layout_marginEnd="62dp"
        android:hint="Enter expiry date"
        android:textSize="18sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/textView2"
        app:layout_constraintTop_toBottomOf="@+id/editText"
        tools:ignore="TouchTargetSizeCheck" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="32dp"
        android:text="CVV :"
        android:textSize="20sp"
        android:textStyle="bold"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.135"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView2" />

    <EditText
        android:id="@+id/editText3"
        android:layout_width="170dp"
        android:layout_height="39dp"
        android:layout_marginTop="20dp"
        android:hint="Enter CVV"
        android:inputType="number"
        android:textSize="18sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.563"
        app:layout_constraintStart_toEndOf="@+id/textView3"
        app:layout_constraintTop_toBottomOf="@+id/editText2"
        tools:ignore="TouchTargetSizeCheck" />

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="49dp"
        android:layout_marginTop="35dp"
        android:layout_marginEnd="67dp"
        android:text="Name :"
        android:textSize="20sp"
        android:textStyle="bold"
        app:layout_constraintEnd_toStartOf="@+id/editText4"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView3" />

    <EditText
        android:id="@+id/editText4"
        android:layout_width="170dp"
        android:layout_height="40dp"
        android:layout_marginTop="23dp"
        android:layout_marginEnd="62dp"
        android:layout_marginBottom="173dp"
        android:hint="Enter card owner name"
        android:textSize="18sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/editText3"
        tools:ignore="TouchTargetSizeCheck" />

    <Button
        android:id="@+id/button"
       android:layout_width="121dp"
        android:layout_height="48dp"
        android:layout_marginBottom="96dp"
        android:text="Add Card"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        tools:ignore="TouchTargetSizeCheck" />

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.java:

package com.example.labq11;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    EditText cNo, oName;
    String cardNo, ownerName;
    Button b;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        cNo = (EditText) findViewById(R.id.editText);
        oName = (EditText) findViewById(R.id.editText4);

        b = (Button) findViewById(R.id.button);
        b.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                submit(view);
            }
        });
    }
    public void submit(View v){
        cardNo = cNo.getText().toString();
        ownerName = oName.getText().toString();
        Toast.makeText(MainActivity.this,"Card "+cardNo +"\n added Successful",Toast.LENGTH_SHORT).show();
    }

}

Output :

==========================================================================

Q12. Write a program to demonstrate Options Menu in android for a restaurant and display appropriate message related to the dish user has opted from the menu on text field.

activity_main.xml.

Array.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="menu_options">
        <item>Pizza</item>
        <item>Burger</item>
        <item>Pasta</item>
        
    </string-array>

</resources>

MainActivity.java:

package com.example.a12practical;

import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import com.example.a12practical.R;

public class MainActivity extends AppCompatActivity {

    private Spinner menuSpinner;
    private TextView resultText;

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

        menuSpinner = findViewById(R.id.menuSpinner);
        resultText = findViewById(R.id.resultText);

        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
                this,
                R.array.menu_options,
                android.R.layout.simple_spinner_item
        );
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        menuSpinner.setAdapter(adapter);
    }

    public void displaySelectedDish(View view) {
        String selectedDish = menuSpinner.getSelectedItem().toString();
        String message = "You selected: " + selectedDish;
        resultText.setText(message);

Output-

Ticker

Android Lab file 2 to 12

Post a Comment

0 Comments

Subscribe Us

Most Popular

sort elements using quick sort and merge two sorted array elements.

search insert elements using binary search method in one dimensional array

Facebook

Search This Blog

Report Abuse

About Me

Popular Posts

sort elements using quick sort and merge two sorted array elements.

search insert elements using binary search method in one dimensional array

Footer Menu Widget

Ad Code

Ticker

Android Lab file 2 to 12

Post a Comment

0 Comments

Social Plugin

Subscribe Us

Most Popular

sort elements using quick sort and merge two sorted array elements.

search insert elements using binary search method in one dimensional array

Facebook

Search This Blog

Report Abuse

About Me

Ad Code

Popular Posts

sort elements using quick sort and merge two sorted array elements.

search insert elements using binary search method in one dimensional array

Footer Menu Widget