不同Activity中的Java/Android ArrayList [英] Java / Android ArrayList in different Activity

问题描述

我正在尝试让 Arraylist 在 Android 上的另一个活动中工作.一切都很好.数组列表已创建，但是，我无法让 Intent 工作.

I'm trying to get an Arraylist to work in another Activity on Android. All is well. The arrray list is created, however, I cannot get Intent to work.

有什么方法可以让数组列表指向另一个变量?

What way is there to get an arraylist to another variable?

这是我用来生成 arrayList 的代码:

Here is the code I'm using to generate the arrayList:

public List<Contact> getAllContacts() {
List<Contact> ContactpList = new ArrayList<Contact>();

我将如何在其他活动中使用此数组列表?

How will I go about making this arraylist available in my other activities?

推荐答案

如果你有数组列表，这是你的活动:

This is your activity were you have array list Right:

public List<Contact> getAllContacts() {
List<Contact> ContactpList = new ArrayList<Contact>();

现在当你调用另一个活动然后像这样发送数组对象:

now when u call another activity then send the array object like this:

Intent intent = new Intent(youractivity.this,youractivity.class);
intent.putExtra("ContactpList ", ContactpList );
startActivity(intent);

现在在您调用的活动中获取此数组，并且您想获取该数组:

now get this array in the activity which you have called and were u want to get the array:

ArrayList<String> resultArray = getIntent().getStringArrayListExtra("ContactpList ");

希望它对你有用.

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