如何在attachBaseContext调用前获取sharedPreferences键值？

public class MyApplication extends Application {
    private SharedPreferences sharedPreferences;

    @Override
    public void onCreate() {
        super.onCreate();
        sharedPreferences = getSharedPreferences("my_prefs", Context.MODE_PRIVATE);
    }

    public SharedPreferences getSharedPreferences() {
        return sharedPreferences;
    }
}

public class MyActivity extends AppCompatActivity {
    private SharedPreferences sharedPreferences;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        MyApplication myApplication = (MyApplication) getApplication();
        sharedPreferences = myApplication.getSharedPreferences();
        
        // 获取键值
        String value = sharedPreferences.getString("key", "default_value");
    }
}