如何在Androidstudio中用kotlin制作登录界面,具体要求1. When the user clicks on "LOGIN" for the first time, a toast message will pop up saying "Please register first...". 2. Click "REGISTER", and the APP will jump to the "Register" interface. 3. In the "Register" interface, enter the "Username" and "Password", and click "REGISTER" to return to the "Login" interface. 4. In the "Login" interface, after the user enters the accurate "username" and "password", the APP jumps to the "Login Successful" interface. The interface displays "Welcome + username!". 5. If the user enters the wrong username or password three times and the login fails, the login button becomes unavailable
时间: 2023-07-06 08:43:21 浏览: 63
好的,以下是一个简单的示例代码,用于在Android Studio中用Kotlin实现登录界面的要求:
MainActivity.kt
```
import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.EditText
import android.widget.Toast
class MainActivity : AppCompatActivity() {
private lateinit var usernameEditText: EditText
private lateinit var passwordEditText: EditText
private lateinit var loginButton: Button
private lateinit var registerButton: Button
private var remainingAttempts = 3
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
usernameEditText = findViewById(R.id.username_edit_text)
passwordEditText = findViewById(R.id.password_edit_text)
loginButton = findViewById(R.id.login_button)
registerButton = findViewById(R.id.register_button)
loginButton.setOnClickListener {
if (remainingAttempts > 0) {
if (usernameEditText.text.toString() == "user" && passwordEditText.text.toString() == "password") {
val intent = Intent(this, LoginSuccessfulActivity::class.java)
intent.putExtra("username", usernameEditText.text.toString())
startActivity(intent)
remainingAttempts = 3
} else {
remainingAttempts--
if (remainingAttempts == 0) {
loginButton.isEnabled = false
}
Toast.makeText(this, "Incorrect username or password. Remaining attempts: $remainingAttempts", Toast.LENGTH_SHORT).show()
}
} else {
Toast.makeText(this, "Login button disabled. Please try again later.", Toast.LENGTH_SHORT).show()
}
}
registerButton.setOnClickListener {
Toast.makeText(this, "Please register first...", Toast.LENGTH_SHORT).show()
val intent = Intent(this, RegisterActivity::class.java)
startActivity(intent)
}
}
}
```
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:gravity="center"
android:orientation="vertical"
tools:context=".MainActivity">
<EditText
android:id="@+id/username_edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Username" />
<EditText
android:id="@+id/password_edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Password"
android:inputType="textPassword" />
<Button
android:id="@+id/login_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="LOGIN" />
<Button
android:id="@+id/register_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="REGISTER" />
</LinearLayout>
```
RegisterActivity.kt
```
import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.EditText
class RegisterActivity : AppCompatActivity() {
private lateinit var usernameEditText: EditText
private lateinit var passwordEditText: EditText
private lateinit var registerButton: Button
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_register)
usernameEditText = findViewById(R.id.username_edit_text)
passwordEditText = findViewById(R.id.password_edit_text)
registerButton = findViewById(R.id.register_button)
registerButton.setOnClickListener {
val intent = Intent(this, MainActivity::class.java)
intent.putExtra("username", usernameEditText.text.toString())
intent.putExtra("password", passwordEditText.text.toString())
startActivity(intent)
}
}
}
```
activity_register.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:gravity="center"
android:orientation="vertical"
tools:context=".RegisterActivity">
<EditText
android:id="@+id/username_edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Username" />
<EditText
android:id="@+id/password_edit_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Password"
android:inputType="textPassword" />
<Button
android:id="@+id/register_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="REGISTER" />
</LinearLayout>
```
LoginSuccessfulActivity.kt
```
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.TextView
class LoginSuccessfulActivity : AppCompatActivity() {
private lateinit var welcomeTextView: TextView
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_login_successful)
welcomeTextView = findViewById(R.id.welcome_text_view)
val username = intent.getStringExtra("username")
welcomeTextView.text = "Welcome $username!"
}
}
```
activity_login_successful.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:gravity="center"
android:orientation="vertical"
tools:context=".LoginSuccessfulActivity">
<TextView
android:id="@+id/welcome_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Welcome!" />
</LinearLayout>
```
希望这个示例代码对你有帮助!