ANDROID STUDIO PRACTICAL : LINK ACTIVITIES WITH INTENT : CS619

 

TO DOWNLOAD COMPLETE CODE

CLICK ON LINK BELOW

https://docs.google.com/uc?export=download&id=1CHr5pbB8FCRCuOYBUdXHMBl_w4k_ah8b

Screen 1 layout file

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

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:layout_gravity="center"

    android:gravity="center"

    android:layout_margin="15dp"

    android:orientation="vertical">

    <TextView

        android:layout_width="wrap_content"

        android:text="Login Screen"

        android:textSize="30sp"

        android:layout_margin="20dp"

        android:layout_height="wrap_content"></TextView>

    <EditText

        android:layout_margin="15dp"

        android:layout_width="match_parent"

        android:id="@+id/etUsername"

        android:hint="Enter Your ID"

        android:layout_height="wrap_content"></EditText>

    <EditText

        android:inputType="numberPassword"

        android:layout_margin="15dp"

        android:layout_width="match_parent"

        android:id="@+id/etPassword"

        android:hint="Enter Your Password"

        android:layout_height="wrap_content"></EditText>

    <Button

        android:onClick="btnLoginClick"

        android:layout_width="wrap_content"

        android:text="Login"

        android:id="@+id/btnLogin"

        android:layout_height="wrap_content"></Button>

</LinearLayout>

.............

Screen 1 Java File

package com.example.intents;

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;

import android.widget.Toast;

import javax.xml.transform.Source;

public class Screen1 extends AppCompatActivity

{

    EditText etUsername;

    EditText etPassword;

    String myUsername = "bs130200310";

    String myPassword = "111111111";

    String myName = "Rehan Attari";

    @Override

    protected void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_screen1);

        etUsername = findViewById(R.id.etUsername);

        etPassword = findViewById(R.id.etPassword);

    }

    public void btnLoginClick(View view)

    {

        String inputUsername = etUsername.getText().toString();

        String inputPassword = etPassword.getText().toString();

        if (inputUsername.equals(myUsername) && inputPassword.equals(myPassword))

        {

            Toast.makeText(this, "Login Success", Toast.LENGTH_SHORT).show();

            Intent intent = new Intent(Screen1.this, Screen2.class);

            intent.putExtra("key", myName);

            startActivity(intent);

        } else

        {

            Toast.makeText(this, "Invalid Username Or Password. Please Try again", Toast.LENGTH_SHORT).show();

        }

    }

}

..........

Screen 2 layout file

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

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:layout_gravity="center"

    android:gravity="center"

    android:orientation="vertical">

<TextView

    android:id="@+id/tv"

    android:textSize="30sp"

    android:layout_width="wrap_content"

    android:text="Welcome"

    android:layout_height="wrap_content"></TextView>

</LinearLayout>

......

Screen 2 Java File

package com.example.intents;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;

import android.os.Bundle;

import android.widget.TextView;

public class Screen2 extends AppCompatActivity

{

    TextView tv;

    @Override

    protected void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_screen2);

        tv = findViewById(R.id.tv);

        Intent intent = getIntent();

        String receivedName = intent.getStringExtra("key");

        tv.setText("Welcome : " + receivedName);

    }

}

ANDROID STUDIO APP 2

xml code

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

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:layout_gravity="center"

    android:gravity="center"

    android:padding="20dp"

    android:orientation="vertical">

    <TextView

        android:layout_width="wrap_content"

        android:text="Addition Calcluator"

        android:textSize="30dp"

        android:layout_marginBottom="30dp"

        android:layout_height="wrap_content"></TextView>

    <EditText

        android:id="@+id/et1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:hint="Enter Value 1"

        android:inputType="numberSigned"></EditText>

    <EditText

        android:id="@+id/et2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:hint="Enter Value 2"

        android:inputType="numberSigned"></EditText>

    <Button

        android:onClick="getAnswer"

        android:id="@+id/btnAdd"

        android:layout_marginTop="20dp"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Add"></Button>

    <TextView

        android:layout_marginTop="20dp"

        android:textSize="30dp"

        android:layout_width="wrap_content"

        android:id="@+id/tvAnswer"

        android:layout_height="wrap_content"></TextView>

</LinearLayout>

package com.example.additioncalculatorapp2;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity

{

    @Override

    protected void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

    public void getAnswer(View view)

    {

        // linking to layout xml file

        EditText editText1 = findViewById(R.id.et1);

        EditText editText2 = findViewById(R.id.et2);

        TextView tvAns = findViewById(R.id.tvAnswer);

        int input1 = Integer.parseInt ( editText1.getText().toString() );

        int input2 = Integer.parseInt ( editText2.getText().toString() );

        int answer = input1 + input2;

        

        tvAns.setText(String.valueOf(answer));

        

        Toast.makeText(this, String.valueOf(answer), Toast.LENGTH_SHORT).show();

    }

}