Notes

package com.example.program1;

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

public class MainActivity extends AppCompatActivity {

EditText name, password, address, age;
RadioGroup genderGroup;
Button submit;
TextView result;

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

name = findViewById(R.id.etName);
password = findViewById(R.id.etPassword);
address = findViewById(R.id.etAddress);
age = findViewById(R.id.etAge);
genderGroup = findViewById(R.id.rgGender);
submit = findViewById(R.id.btnSubmit);
result = findViewById(R.id.txtResult);

submit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

String uname = name.getText().toString();
String pass = password.getText().toString();
String addr = address.getText().toString();
String uage = age.getText().toString();

int selectedId = genderGroup.getCheckedRadioButtonId();
RadioButton rb = findViewById(selectedId);
String gender = rb.getText().toString();

result.setText(
"Name: " + uname +
"nPassword: " + pass +
"nAddress: " + addr +
"nGender: " + gender +
"nAge: " + uage
);
}
});
}
}


package com.example.program2;



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

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

EditText name, password, address, age;
RadioGroup genderGroup;
Button submit;
TextView result;

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

name = findViewById(R.id.etName);
password = findViewById(R.id.etPassword);
address = findViewById(R.id.etAddress);
age = findViewById(R.id.etAge);
genderGroup = findViewById(R.id.rgGender);
submit = findViewById(R.id.btnSubmit);
result = findViewById(R.id.txtResult);

submit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

String uname = name.getText().toString();
String pass = password.getText().toString();
String addr = address.getText().toString();
String uage = age.getText().toString();

int selectedId = genderGroup.getCheckedRadioButtonId();
RadioButton rb = findViewById(selectedId);
String gender = rb.getText().toString();

result.setText(
"Name: " + uname +
"nPassword: " + pass +
"nAddress: " + addr +
"nGender: " + gender +
"nAge: " + uage
);
}
});
}
}
















package com.example.program3;
import android.os.Bundle;
import android.view.View;
import android.widget.*;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

EditText num1, num2;
TextView result;
Button add, sub, mul, div;

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

num1 = findViewById(R.id.etNum1);
num2 = findViewById(R.id.etNum2);
result = findViewById(R.id.txtResult);

add = findViewById(R.id.btnAdd);
sub = findViewById(R.id.btnSub);
mul = findViewById(R.id.btnMul);
div = findViewById(R.id.btnDiv);

add.setOnClickListener(v -> {
int a = Integer.parseInt(num1.getText().toString());
int b = Integer.parseInt(num2.getText().toString());
result.setText("Result: " + (a + b));
});

sub.setOnClickListener(v -> {
int a = Integer.parseInt(num1.getText().toString());
int b = Integer.parseInt(num2.getText().toString());
result.setText("Result: " + (a - b));
});

mul.setOnClickListener(v -> {
int a = Integer.parseInt(num1.getText().toString());
int b = Integer.parseInt(num2.getText().toString());
result.setText("Result: " + (a * b));
});

div.setOnClickListener(v -> {
int a = Integer.parseInt(num1.getText().toString());
int b = Integer.parseInt(num2.getText().toString());
result.setText("Result: " + (a / b));
});
}}


package com.example.program4;

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

public class MainActivity extends AppCompatActivity {

EditText username, password;
Button btnLogin;

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

username = findViewById(R.id.username);
password = findViewById(R.id.password);
btnLogin = findViewById(R.id.btnLogin);

btnLogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

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

if (user.equals("user") && pass.equals("123")) {
Toast.makeText(MainActivity.this,
"Login Successful",
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this,
"Invalid Login",
Toast.LENGTH_SHORT).show();
}
}
});
}
}





package com.example.program5;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.*;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
EditText name, password;
Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
name = findViewById(R.id.name);
password = findViewById(R.id.password);
btn = findViewById(R.id.btnRegister);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String uname = name.getText().toString();
String pass = password.getText().toString();
Intent intent = new Intent(MainActivity.this, SecondActivity.class);
intent.putExtra("name", uname);
intent.putExtra("password", pass);
startActivity(intent);
}
});
}

package com.example.program6;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.*;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

EditText number, message;
Button send;

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

number = findViewById(R.id.etNumber);
message = findViewById(R.id.etMessage);
send = findViewById(R.id.btnSend);

send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {

String num = number.getText().toString();
String msg = message.getText().toString();

if (num.isEmpty() || msg.isEmpty()) {
Toast.makeText(MainActivity.this,
"Please enter number and message",
Toast.LENGTH_SHORT).show();
} else {
Intent intent = new Intent(Intent.ACTION_SENDTO);
intent.setData(Uri.parse("smsto:" + num));
intent.putExtra("sms_body", msg);
startActivity(intent);
}
}
});
}
}


package com.example.program7;

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

public class MainActivity extends AppCompatActivity {

Button b1, b2, b3;

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

b1 = findViewById(R.id.button1);
b2 = findViewById(R.id.button2);
b3 = findViewById(R.id.button3);

b1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FragmentManager fm = getSupportFragmentManager();
fm.beginTransaction()
.replace(R.id.myframe, new FragmentOne())
.commit();
}
});

b2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FragmentManager fm = getSupportFragmentManager();
fm.beginTransaction()
.replace(R.id.myframe, new FragmentTwo())
.commit();
}
});

b3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FragmentManager fm = getSupportFragmentManager();
fm.beginTransaction()
.replace(R.id.myframe, new FragmentThree())
.commit();
}
});
}
}



package com.example.program7;


import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.fragment.app.Fragment;

public class FragmentOne extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {

TextView tv = new TextView(getActivity());
tv.setText("This is Fragment One");
tv.setTextSize(20);
return tv;
}
}



package com.example.program7;



import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.fragment.app.Fragment;

public class FragmentTwo extends Fragment {

@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container,
Bundle savedInstanceState) {

TextView tv = new TextView(getActivity());
tv.setText("This is Fragment Two");
tv.setTextSize(20);
return tv;
}
}


package com.example.program8;


import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(new ShapeView(this));
}
}


package com.example.program8;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;

public class ShapeView extends View {

Paint paint;

public ShapeView(Context context) {
super(context);
paint = new Paint();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
paint.setColor(Color.BLUE);
canvas.drawRect(100, 100, 400, 300, paint);
paint.setColor(Color.RED);
canvas.drawCircle(550, 250, 100, paint);
paint.setColor(Color.GREEN);
canvas.drawRect(100, 400, 400, 600, paint);

paint.setColor(Color.RED);
canvas.drawCircle(550, 550, 100, paint);
}
}









































package com.example.program9;


import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.widget.*;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

EditText inputId, inputTask, inputNotes;
TextView output;
SQLiteDatabase db;

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

inputId = findViewById(R.id.inputId);
inputTask = findViewById(R.id.inputTask);
inputNotes = findViewById(R.id.inputNotes);
output = findViewById(R.id.output);

db = openOrCreateDatabase("TodoDB", MODE_PRIVATE, null);
db.execSQL("CREATE TABLE IF NOT EXISTS tasks(" +
"id INTEGER PRIMARY KEY AUTOINCREMENT," +
"task TEXT," +
"notes TEXT)");

findViewById(R.id.addBtn).setOnClickListener(v -> addTask());
findViewById(R.id.viewBtn).setOnClickListener(v -> viewTasks());
findViewById(R.id.updateBtn).setOnClickListener(v -> updateTask());
findViewById(R.id.deleteBtn).setOnClickListener(v -> deleteTask());
}

private void addTask() {
ContentValues cv = new ContentValues();
cv.put("task", inputTask.getText().toString());
cv.put("notes", inputNotes.getText().toString());
db.insert("tasks", null, cv);
toast("Added");
clear();
}

private void updateTask() {
ContentValues cv = new ContentValues();
cv.put("task", inputTask.getText().toString());
cv.put("notes", inputNotes.getText().toString());
db.update("tasks", cv, "id=?",
new String[]{inputId.getText().toString()});
toast("Updated");
clear();
}

private void deleteTask() {
db.delete("tasks", "id=?",
new String[]{inputId.getText().toString()});
toast("Deleted");
clear();
}

private void viewTasks() {
Cursor c = db.rawQuery("SELECT * FROM tasks", null);
StringBuilder sb = new StringBuilder();

if (c.moveToFirst()) {
do {
sb.append("ID: ").append(c.getInt(0))
.append("nTask: ").append(c.getString(1))
.append("nNotes: ").append(c.getString(2))
.append("nn");
} while (c.moveToNext());
} else {
sb.append("No Records Found");
}

output.setText(sb.toString());
c.close();
}

private void clear() {
inputId.setText("");
inputTask.setText("");
inputNotes.setText("");
}

private void toast(String msg) {
Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
}
}



























package com.example.program10;

import android.os.Bundle;
import android.widget.*;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

EditText etName, etEmail, etPassword;
Button btnRegister, btnLogin;
DBHelper db;

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

etName = findViewById(R.id.etName);
etEmail = findViewById(R.id.etEmail);
etPassword = findViewById(R.id.etPassword);
btnRegister = findViewById(R.id.btnRegister);
btnLogin = findViewById(R.id.btnLogin);

db = new DBHelper(this);

btnRegister.setOnClickListener(v -> {
boolean result = db.insertUser(
etName.getText().toString(),
etEmail.getText().toString(),
etPassword.getText().toString()
);

if (result)
Toast.makeText(this, "Registered Successfully", Toast.LENGTH_SHORT).show();
else
Toast.makeText(this, "Registration Failed", Toast.LENGTH_SHORT).show();
});

btnLogin.setOnClickListener(v -> {
boolean check = db.checkUser(
etEmail.getText().toString(),
etPassword.getText().toString()
);

if (check)
Toast.makeText(this, "Login Successful", Toast.LENGTH_SHORT).show();
else
Toast.makeText(this, "Invalid Credentials", Toast.LENGTH_SHORT).show();
});
}
}



package com.example.program10;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DBHelper extends SQLiteOpenHelper {

public DBHelper(Context context) {
super(context, "UserDB", null, 1);
}

@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE users(" +
"id INTEGER PRIMARY KEY AUTOINCREMENT," +
"name TEXT," +
"email TEXT," +
"password TEXT)");
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS users");
onCreate(db);
}

public boolean insertUser(String name, String email, String password) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put("name", name);
cv.put("email", email);
cv.put("password", password);
long res = db.insert("users", null, cv);
return res != -1;
}

public boolean checkUser(String email, String password) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor c = db.rawQuery(
"SELECT * FROM users WHERE email=? AND password=?",
new String[]{email, password}
);
boolean result = c.getCount() > 0;
c.close();
return result;
}
}



















<?xml1 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"
android:background="@drawable/img">

<TextView
android:id="@+id/textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello MCA"
android:textSize="24sp"
android:textColor="#FFFFFF"
android:layout_centerInParent="true" />
</RelativeLayout>



<?xml2 version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="16dp">

<EditText
android:id="@+id/etName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="User Name" />

<EditText
android:id="@+id/etPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Password"
android:inputType="textPassword" />

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

<RadioGroup
android:id="@+id/rgGender"
android:layout_width="wrap_content"
android:layout_height="wrap_content">

<RadioButton
android:id="@+id/rbMale"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Male" />

<RadioButton
android:id="@+id/rbFemale"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Female" />
</RadioGroup>

<EditText
android:id="@+id/etAge"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Age"
android:inputType="number" />

<Button
android:id="@+id/btnSubmit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Submit" />

<TextView
android:id="@+id/txtResult"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="16sp"
android:paddingTop="20dp" />

</LinearLayout>
</ScrollView>






<?xml3 version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="16dp">

<EditText
android:id="@+id/etNum1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter Number 1"
android:inputType="number" />

<EditText
android:id="@+id/etNum2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter Number 2"
android:inputType="number" />

<Button
android:id="@+id/btnAdd"
android:text="Add"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<Button
android:id="@+id/btnSub"
android:text="Sub"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<Button
android:id="@+id/btnMul"
android:text="Mul"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<Button
android:id="@+id/btnDiv"
android:text="Div"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

<TextView
android:id="@+id/txtResult"
android:text="Result:"
android:textSize="18sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />

</LinearLayout>


<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="20dp">

<TableRow>
<TextView
android:text="Username"
android:textSize="16sp"
android:padding="10dp"/>

<EditText
android:id="@+id/username"
android:hint="Enter Username"
android:layout_width="200dp"/>
</TableRow>

<TableRow>
<TextView
android:text="Password"
android:textSize="16sp"
android:padding="10dp"/>

<EditText
android:id="@+id/password"
android:hint="Enter Password"
android:inputType="textPassword"
android:layout_width="200dp"/>
</TableRow>

<TableRow>
<Button
android:id="@+id/btnLogin"
android:text="Login"/>
</TableRow>

</TableLayout>

<?xml5 version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="20dp">

<EditText
android:id="@+id/name"
android:hint="Enter Name"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<EditText
android:id="@+id/password"
android:hint="Enter Password"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<Button
android:id="@+id/btnRegister"
android:text="Register"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>





<?xml6 version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="20dp">

<EditText
android:id="@+id/etNumber"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter Mobile Number"
android:inputType="phone"/>

<EditText
android:id="@+id/etMessage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Enter Message"
android:inputType="text"/>

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

</LinearLayout>


<?xml7 version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="@+id/button1"
android:text="Fragment 1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button
android:id="@+id/button2"
android:text="Fragment 2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>

<Button
android:id="@+id/button3"
android:text="Fragment 3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>

<FrameLayout
android:id="@+id/myframe"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>

<?xml9 version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="16dp">
<EditText
android:id="@+id/inputId"
android:hint="ID"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<EditText
android:id="@+id/inputTask"
android:hint="Task"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<EditText
android:id="@+id/inputNotes"
android:hint="Notes"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<Button
android:id="@+id/addBtn"
android:text="Add"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<Button
android:id="@+id/viewBtn"
android:text="View"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<Button
android:id="@+id/updateBtn"
android:text="Update"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<Button
android:id="@+id/deleteBtn"
android:text="Delete"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<TextView
android:id="@+id/output"
android:textSize="16sp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="10dp"/>
</LinearLayout>



<?xml10 version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical"
android:padding="16dp">

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

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

<EditText
android:id="@+id/etPassword"
android:hint="Password"
android:inputType="textPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>

<Button
android:id="@+id/btnRegister"
android:text="Register"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<Button
android:id="@+id/btnLogin"
android:text="Login"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>