卸载android应用程序后如何保存共享首选项数据

Question

最近，我在用户登录时将数据保存在共享首选项中。 现在，如果应用程序已卸载，则共享首选项的数据将被保存。当用户重新安装应用程序时，再次获得该数据就不想再次登录：

android:allowBackup="true"
android:fullBackupOnly="true"

共享的偏好代码

public class SharedPrefManager {
//the constants
private static final String SHARED_PREF_NAME = "simplifiedcodingsharedpref";
private static final String KEY_USERNAME = "keyusername";
private static final String KEY_EMAIL = "keyemail";
private static final String KEY_api_token = "api_token";
private static final String KEY_role = "role";
private static final String KEY_ID = "keyid";

private static SharedPrefManager mInstance;
private static Context mCtx;

private SharedPrefManager(Context context) {
    mCtx = context;
}

public static synchronized SharedPrefManager getInstance(Context context) {
    if (mInstance == null) {
        mInstance = new SharedPrefManager(context);
    }
    return mInstance;
}

//method to let the user login
//this method will store the user data in shared preferences
public void userLogin(User user) {
    SharedPreferences sharedPreferences = mCtx.getSharedPreferences(SHARED_PREF_NAME, Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPreferences.edit();
    editor.putInt(KEY_ID, user.getId());
    editor.putString(KEY_USERNAME, user.getUsername());
    editor.putString(KEY_EMAIL, user.getEmail());
    editor.putString(KEY_api_token, user.getapi_token());
    editor.putString(KEY_role, user.getrole());
    editor.apply();
}

//this method will checker whether user is already logged in or not
public boolean isLoggedIn() {
    SharedPreferences sharedPreferences = mCtx.getSharedPreferences(SHARED_PREF_NAME, Context.MODE_PRIVATE);
    return sharedPreferences.getString(KEY_USERNAME, null) != null;
}

//this method will give the logged in user
public User getUser() {
    SharedPreferences sharedPreferences = mCtx.getSharedPreferences(SHARED_PREF_NAME, Context.MODE_PRIVATE);
    return new User(
            sharedPreferences.getInt(KEY_ID, -1),
            sharedPreferences.getString(KEY_USERNAME, null),
            sharedPreferences.getString(KEY_EMAIL, null),
            sharedPreferences.getString(KEY_api_token, null),
            sharedPreferences.getString(KEY_role, null)
    );
}
}