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Activity Main - XML

The document contains an XML layout for a login screen with two EditText fields for username and password, and a disabled login button. The MainActivity.java file implements the functionality to enable the login button when both fields are filled and checks the credentials upon clicking the button. If the credentials match predefined values, a success message is displayed; otherwise, an invalid credentials message appears.

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huzaifasalim10
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18 views5 pages

Activity Main - XML

The document contains an XML layout for a login screen with two EditText fields for username and password, and a disabled login button. The MainActivity.java file implements the functionality to enable the login button when both fields are filled and checks the credentials upon clicking the button. If the credentials match predefined values, a success message is displayed; otherwise, an invalid credentials message appears.

Uploaded by

huzaifasalim10
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Activity_main.

xml:
<?xml 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/i1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Username"
android:inputType="text"/>

<EditText
android:id="@+id/e2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Password"
android:inputType="textPassword"/>

<Button
android:id="@+id/b1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Login"
android:enabled="false"
android:layout_marginTop="20dp"/>
</LinearLayout>

MainActivity.java:
package com.example.p28;

import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
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 {
private EditText i1, e2;
private Button b1;

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

i1 = findViewById(R.id.i1);
e2 = findViewById(R.id.e2);
b1 = findViewById(R.id.b1);
b1.setEnabled(false);

TextWatcher textWatcher = new TextWatcher() {


@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
validateInputs();
}

@Override
public void afterTextChanged(Editable s) {}
};

i1.addTextChangedListener(textWatcher);
e2.addTextChangedListener(textWatcher);

b1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String username = i1.getText().toString();
String password = e2.getText().toString();

if (username.equals("Aqdus") && password.equals("password")) {


Toast.makeText(MainActivity.this, "Login Successful",
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "Invalid Credentials",
Toast.LENGTH_SHORT).show();
}
}
});
}
private void validateInputs() {
String username = i1.getText().toString().trim();
String password = e2.getText().toString().trim();
b1.setEnabled(!username.isEmpty() && !password.isEmpty());
}
}

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