通过在Android中Java的传递的双精度值到不同类 [英] Passing a double value through to a different class in Android Java

问题描述

我只是想知道什么样的方式有通过从ClassA的两个或两个以上的双值ClassB的

I am just wondering what ways there are to pass two or more double values from classA to ClassB

在一分钟我已经找到code，让我这个方法：

at the minute i have found code that give me this method:

double a, b;
double a = 2.456;
double b = 764.2353;
Intent i = new Intent();
i.setClassName("com.b00348312.application","com.b00348312.application.ClassB");
double number = getIntent().getDoubleExtra("value1", a);
double number = getIntent().getDoubleExtra("value2", b);
startActivity(i); 

这不通过的值，也可以找到检索这些值的方法

This does not pass the values through nor can i find a way of retrieving these values

在这里还有一个问题提出创建类的实例，但在尝试，我似乎无法通过正确地传递价值的方法。

Another question on here suggested the method of creating an instance of the class but trying that i cant seem to pass the values through properly.

我编程的机器人，所以我不知道是否该方法会有所不同。

I am programming for Android, so I don't know if the method will be different

推荐答案

您实际上并没有把你的双打到意图

You're not actually placing your doubles into your Intent

Intent yourInent = new Intent(thisActivity.this, nextActivity.class);
Bundle b = new Bundle();
b.putDouble("key", doubleVal);
yourIntent.putExtras(b);
startActivity(yourIntent);

然后，把它在你的下一个活动：

Then, get it in your next Activity:

Bundle b = getIntent().getExtras();
double result = b.getDouble("key");

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