通过意图传递构造的数据，而不是 [英] Passing data through intents instead of constructors

问题描述

已经开发了许多桌面GUI程序（从Xt的Qt的，Java的AWT / SWT / Swing的，等等），我真的觉得很难习惯到Android。

Having developed many desktop GUI apps (from Xt to Qt, Java Awt/Swt/Swing, etc) I really find it difficult to get used to Android.

假设我有它通过意向机制明确要求DetailedView如下图所示的活动的MainView类：

Suppose I have the MainView Activity class which explicitly calls DetailedView via intent mechanism as shown next:

• 由于一个Activity类通过的onCreate（）实例化我怎么 定制呢？ （无构造函数，只 通过意图传递数据！）

• Since an Activity class is instantiated via onCreate() how do I customize it? (No constructor, only pass data through intent!)

有没有办法让在DetailedView实例的引用 MainActivity？

Is there a way to get a reference for the DetailedView instance in MainActivity?

有没有办法让在MainActivity实例的引用 DetailedView？

Is there a way to get a reference for the MainActivity instance in DetailedView?

如何通过引用前端到DetailedView类？ Intent.putExtras（）只允许 某些数据类型传递给 意图接收器类。

How can I pass the reference to FrontEnd to the DetailedView class? Intent.putExtras() allows only for certain data types to pass to the intent receiver class.

MainActivity {
    ...
    FrontEnd fe;
    ...

public void onCreate(Bundle savedInstanceState) {
    ...
    Intent myIntent = new Intent(this, DetailedView.class);
    ...
}


protected void onListItemClick(ListView l, View v, int position, long id) {
    ...
    startActivityForResult(myIntent,..);
    ...
}

}

}

推荐答案

我经常欺骗和使用静态'的getInstance呼吁活动和观点之间的通信。这个工作，只要他们都在同一个进程内，而我还没有有一个数据访问失败...但我敢肯定，这只是一个时间的问题。如果你正在寻找一个哈克快速修复，这可能是它，否则，您必须通过意图传递数据。

I frequently cheat and use static 'getInstance' calls to communicate between Activities and views. This works as long as they're both in the same proc, and I've yet to have a data access failure...but I'm sure it's only a matter of time...IF you're looking for a hacky quick fix this could be it, otherwise you have to pass data through intents.

这篇关于通过意图传递构造的数据，而不是的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！