如何将字符串从一个活动传递到另一个活动? [英] How do you pass a string from one activity to another?

问题描述

我想知道如何从另一个活动传递和读取一个活动中的字符串.我有两个活动.我将它们称为 Activity1 和 Activity2.我在 Activity1 中有一个名为 course 的字符串.我想在 Activity2 中读取该字符串.

I'm wondering how to pass and read a string that is in one activity from another activity. I have two activities. I'll call them Activity1 and Activity2. I have a string in Activity1 called course. I want to read that string in Activity2.

我试过这样做，但字符串是空的.

I've tried doing this but the string came out empty.

public class Activity2 extends Activity1 {

我见过有人使用 Intent 函数，但我不知道如何使用它.

I've seen people use the Intent function but I couldn't figure out how to use it.

有什么建议吗?谢谢！

推荐答案

使用意图传递值.

在您的第一个活动中

 Intent i= new Intent("com.example.secondActivity");
 i.putExtra("key",mystring);
 // for explicit intents 
 // Intent i= new Intent(ActivityName.this,SecondActivity.class);    
 // parameter 1 is the key
 // parameter 2 is the value 
 // your value
 startActivity(i);

在您的第二个活动中检索它.

In your second activity retrieve it.

Bundle extras = getIntent().getExtras();
if (extras != null) {
String value = extras.getString("key");
//get the value based on the key
}

要传递自定义对象，您可以查看此链接

To pass custom objects you can have a look at this link

http://www.technotalkative.com/android-send-object-from-one-activity-to-another-activity/

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