java - 为什么我的电子邮件 EditText 保存在我的昵称 EditText 上？

Question

我正在努力完成 “Sam 的 24 小时 Android 应用程序开发技术”，但在某些时候我的昵称和电子邮件设置停止正确保存。它现在根本不保存昵称并将电子邮件保存到两者。我做了什么导致这个，我该如何解决？

我认为这些是代码的相关领域，但如果您需要更多请询问。据我所知，这仍然是书中的代码，并且曾经有效。也许某处打字错误？

public class QuizActivity extends Activity {
public static final String GAME_PREFERENCES = "GamePrefs"; 
public static final String GAME_PREFERENCES_NICKNAME = null; //String
public static final String GAME_PREFERENCES_EMAIL = null; //String

@Override
protected void onPause() {
    super.onPause();

    EditText nicknameText = (EditText) findViewById(R.id.EditText_Nickname);
    EditText emailText = (EditText) findViewById(R.id.EditText_Email);

    String strNickname = nicknameText.getText().toString();
    String strEmail = emailText.getText().toString();

    // TODO: fix password and email saving and displaying improperly
    Editor editor = mGameSettings.edit();
    editor.putString(GAME_PREFERENCES_NICKNAME, strNickname);
    editor.putString(GAME_PREFERENCES_EMAIL, strEmail);
    editor.commit();

    Toast.makeText(QuizSettingsActivity.this, R.string.settings_saved,
            Toast.LENGTH_SHORT).show();

}

public void initNicknameEntry() {
    EditText nicknameText = (EditText) findViewById(R.id.EditText_Nickname);
    if (mGameSettings.contains(GAME_PREFERENCES_NICKNAME)) {
        nicknameText.setText(mGameSettings.getString(
                GAME_PREFERENCES_NICKNAME, ""));
    }
}

public void initEmailEntry() {
    EditText emailText = (EditText) findViewById(R.id.EditText_Email);
    if (mGameSettings.contains(GAME_PREFERENCES_EMAIL)) {
        emailText.setText(mGameSettings.getString(GAME_PREFERENCES_EMAIL,
                ""));
    }
}

Answer 1

您必须将它们初始化为不同的值:

public static final String GAME_PREFERENCES_NICKNAME = "Nickname"; //String
public static final String GAME_PREFERENCES_EMAIL = "Email"; //String

否则 SharedPreferences 无法区分这两个键，将始终返回找到的第一个键。