andriod studio登录注册页面代码

以下是一个简单的 Android Studio 登录注册页面的代码示例：

**activity_login.xml**

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/login_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

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

    <EditText
        android:id="@+id/password_edittext"
        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" />

    <TextView
        android:id="@+id/register_textview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Don't have an account? Register here." />

</LinearLayout>

**activity_register.xml**

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/register_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

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

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

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

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

</LinearLayout>

**LoginActivity.java**

public class LoginActivity extends AppCompatActivity {

    private EditText usernameEditText, passwordEditText;
    private Button loginButton;
    private TextView registerTextView;

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

        usernameEditText = findViewById(R.id.username_edittext);
        passwordEditText = findViewById(R.id.password_edittext);
        loginButton = findViewById(R.id.login_button);
        registerTextView = findViewById(R.id.register_textview);

        loginButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // Handle login button click
                String username = usernameEditText.getText().toString();
                String password = passwordEditText.getText().toString();
                // Do login validation here
            }
        });

        registerTextView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // Launch register activity
                Intent intent = new Intent(LoginActivity.this, RegisterActivity.class);
                startActivity(intent);
            }
        });
    }
}

**RegisterActivity.java**

public class RegisterActivity extends AppCompatActivity {

    private EditText usernameEditText, passwordEditText, confirmPasswordEditText;
    private Button registerButton;

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

        usernameEditText = findViewById(R.id.username_edittext);
        passwordEditText = findViewById(R.id.password_edittext);
        confirmPasswordEditText = findViewById(R.id.confirm_password_edittext);
        registerButton = findViewById(R.id.register_button);

        registerButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // Handle register button click
                String username = usernameEditText.getText().toString();
                String password = passwordEditText.getText().toString();
                String confirmPassword = confirmPasswordEditText.getText().toString();
                // Do registration validation here
            }
        });
    }
}

注意：这只是一个示例代码，实际应用中需要进行更严格的登录和注册验证。