android:如何在活动之间共享POJO [英] android: How to share a POJO between Activities

问题描述

我正在将程序移植到Android.我在POJO上拥有所有的业务逻辑，因此我需要将Activity用作前端.

I am porting a program to Android. I have all my business logic on POJOs, so I need to use Activities as a mere front-end.

问题是我不知道如何在活动"之间共享POJO.我已经尝试过了，但是不起作用:

The problem is that I don't know how to share POJO between Activities; I've tried with this, but it doesn't work:

class Activity1 extends Activity{
Logic logic=new Logic();

public Logic getLogic(){
return logic
}
}

class Activity2 extends Activity{
Logic logic;
public void onCreate(Bundle savedInstanceState) {
    main = (Activity1) findViewById((R.id.Activity1);
    logic= main.getLogic(); 
}
}

请注意，POJO并非用于共享数据，它实际上包含业务逻辑.

Please note that POJO is not for sharing data, it actually contains business logic.

推荐答案

main = (Activity1) findViewById((R.id.Activity1);

findViewById仅适用于视图！它不是要用于活动，因为活动更像是屏幕"，而不是视图本身.

findViewById works only for views! Its not meant to be used for activities as an activity is more like a "screen" and not a view itself.

如果您的业务逻辑可能是单例的，那么我建议您这样做.这应该是最简单的方法.

If it is possible for your business logic to be a singleton, than I would recommend to make it so. It should be the easiest way.

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