Question

我正在通过“Sam's Tech Yourself Android应用程序开发24小时”的工作，在某些时候我的昵称和电子邮件设置已经停止正确保存。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区域，但如果您需要更多，请询问。据我所知，这仍然是书中的代码，它曾经起作用。也许在某处错字？

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

您必须将这些值初始化为不同的值：

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，并且将始终返回找到的第一个键。

为什么我的电子邮件EditText会保存我的昵称EditText？

1 个答案: