android账号填写代码,Android制作登录页面并且记住账号密码功能的实现代码

以下是一个简单的 Android 登录页面的示例，并包含记住账号密码功能的实现代码：

1. activity_login.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/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" />

    <CheckBox
        android:id="@+id/remember_checkbox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Remember Me" />

    <Button
        android:id="@+id/login_button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Log In" />

</LinearLayout>

2. LoginActivity.java

public class LoginActivity extends AppCompatActivity {

    private EditText mUsernameEditText;
    private EditText mPasswordEditText;
    private CheckBox mRememberCheckbox;

    private SharedPreferences mSharedPreferences;
    private SharedPreferences.Editor mEditor;

    private static final String PREFS_NAME = "MyPrefsFile";
    private static final String KEY_USERNAME = "username";
    private static final String KEY_PASSWORD = "password";
    private static final String KEY_REMEMBER = "remember";

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

        mUsernameEditText = findViewById(R.id.username_edittext);
        mPasswordEditText = findViewById(R.id.password_edittext);
        mRememberCheckbox = findViewById(R.id.remember_checkbox);

        mSharedPreferences = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
        mEditor = mSharedPreferences.edit();

        boolean rememberMe = mSharedPreferences.getBoolean(KEY_REMEMBER, false);
        mRememberCheckbox.setChecked(rememberMe);

        if (rememberMe) {
            String username = mSharedPreferences.getString(KEY_USERNAME, "");
            String password = mSharedPreferences.getString(KEY_PASSWORD, "");

            mUsernameEditText.setText(username);
            mPasswordEditText.setText(password);
        }

        Button loginButton = findViewById(R.id.login_button);
        loginButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String username = mUsernameEditText.getText().toString().trim();
                String password = mPasswordEditText.getText().toString().trim();

                if (username.isEmpty() || password.isEmpty()) {
                    Toast.makeText(LoginActivity.this, "Please enter username and password", Toast.LENGTH_SHORT).show();
                } else {
                    if (mRememberCheckbox.isChecked()) {
                        mEditor.putString(KEY_USERNAME, username);
                        mEditor.putString(KEY_PASSWORD, password);
                        mEditor.putBoolean(KEY_REMEMBER, true);
                        mEditor.apply();
                    } else {
                        mEditor.clear();
                        mEditor.apply();
                    }

                    // Do login logic here
                }
            }
        });
    }
}

在上面的代码中，我们使用了 Android 的 SharedPreferences 来存储记住的账号密码信息。如果用户勾选了“记住我”的复选框，则将账号密码信息存储到 SharedPreferences 中，并在下次打开应用时自动填充。如果用户没有勾选“记住我”的复选框，则清除 SharedPreferences 中的账号密码信息。