小编use*_*292的帖子

我已经按照这个链接成功地在Android中制作了单例类. http://www.devahead.com/blog/2011/06/extending-the-android-application-class-and-dealing-with-singleton/

问题是我想要一个对象.就像我有活动A和活动B.在活动AI中从Singleton访问对象class.我使用该对象并对其进行了一些更改.

当我移动到Activity B并从Singleton Class访问该对象时,它给了我初始化的对象,并且不保留我在Activity A中所做的更改.还有其他方法可以保存更改吗？请高手帮帮我.这是MainActivity

public class MainActivity extends Activity {
    protected MyApplication app;        
    private OnClickListener btn2=new OnClickListener() {    
        @Override
        public void onClick(View arg0) {
            Intent intent=new Intent(MainActivity.this,NextActivity.class);
            startActivity(intent);              
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //Get the application instance
        app = (MyApplication)getApplication();

        // Call a custom application method
        app.customAppMethod();

        // Call a custom method in MySingleton
        Singleton.getInstance().customSingletonMethod();

        Singleton.getInstance();
        // Read the value of a variable in MySingleton
        String singletonVar = Singleton.customVar; …