通过 Intent 传递 ArrayList

问题描述：

我正在尝试使用意图将 arrayList 传递给另一个活动.这是第一个活动中的代码.

I am trying to pass an arrayList to another activity using intents. Here is the code in the first activity.

case R.id.editButton:
        Toast.makeText(this, "edit was clicked", Toast.LENGTH_LONG).show();
        Intent intent = new Intent(this, editList.class);
        intent.putStringArrayListExtra("stock_list", stock_list);
        startActivity(intent);
        break;

这是我尝试在第二个活动中检索列表的地方.这里有什么问题吗?

This is where I try to retrieve the list in the second activity. Is something wrong here?

Intent i = new Intent(); //This should be getIntent();
    stock_list = new ArrayList<String>();

    stock_list = i.getStringArrayListExtra("stock_list");

答

在你的接收意图中你需要做的:

In your receiving intent you need to do:

Intent i = getIntent();  
stock_list = i.getStringArrayListExtra("stock_list");

按照您的方式，您刚刚创建了一个没有任何额外内容的新空意图.

The way you have it you've just created a new empty intent without any extras.

如果你只有一个额外的，你可以把它压缩成:

If you only have a single extra you can condense this down to:

stock_list = getIntent().getStringArrayListExtra("stock_list");

通过 Intent 传递 ArrayList

相关推荐