将变量数据传递给非活动类 [英] passing variable data to non-activity classes

问题描述

将变量数据从<活动> 类传递到<活动>非活动类的最佳方法是什么?数据是在第一个 Acivity 的 onCreate 中创建的，我需要将该数据传递给第二个类而不使用Intent.任何代码示例都将不胜感激.

What is the best way to pass variable data from an Activty to a non-Activty class? The data is created within the onCreate of the first Acivity I need to pass that data to the second class without the use of Intent. Any code samples would be appreciated.

自从我开始使用它以来，我就打算像它那样发布我所拥有的东西.就我而言，我已经有一个 Constructor ，它是一个 ArrayList ，为此，我需要另一个相同类型的对象.所以去了:

Since I got it to work like I intended it to post what I have. In my case I already had a Constructor that was an ArrayList and for what I was doing I needed another one of the same type. So here goes:

ClassActivity

ClassActivity

public class Polygon extends Overlay {
ArrayList<GeoPoint> geoPoints;

public Polygon(ArrayList<GeoPoint> points){
    geoPoints = points;
}

public class Hex{
    public Hex(ArrayList<String> str) {
        // TODO Auto-generated constructor stub
     Log.i("string",str.toString());
    }
  }

我的主要活动有

 Polygon main = new Polygon(null);
 Polygon.Hex mMainClass = (main.new Hex(color));

请注意，我必须在

Polygon.Hex mMainClass = (main.new Hex(color));

推荐答案

如果您的类名是 MainClass ，则为此创建 Constructor 并将值作为参数传递就是一个例子.

If your Class Name is MainClass then Create Constructor for that and pass value as a parameter, below is a example for that.

MainClass.java

MainClass.java

public class MainClass {
    public MainClass(int i, String str) {
        // TODO Auto-generated constructor stub

    }
}

将以下代码用于从MainActivity到MainClass的传递值，其中 i 是整数变量，而 str 是字符串变量

Use below code for Pass Value from MainActivity to MainClass, Here i is integer variable and str is a String variable

MainClass mMainClass = new MainClass(i, str);

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