android - 如何在Android应用程序的“活动”之间传递数据？(How do I pass data between Activities in Android application?)

Question

I have a scenario where, after logging in through a login page, there will be a sign-out button on each activity .

(我有一种情况，在通过登录页面登录后，每个activity上都会有一个退出button 。)

On clicking sign-out , I will be passing the session id of the signed in user to sign-out.

(点击sign-out ，我将传递已登录用户的session id以便退出。)

Can anyone guide me on how to keep session id available to all activities ?

(谁能指导我如何使session id可供所有activities ？)

Any alternative to this case

(这种情况的任何替代方法)

  ask by UMAR translate from so

Answer 1

In your current Activity, create a new Intent :

(在您当前的活动中，创建一个新的Intent ：)

String value="Hello world";
Intent i = new Intent(CurrentActivity.this, NewActivity.class);    
i.putExtra("key",value);
startActivity(i);

Then in the new Activity, retrieve those values:

(然后在新的活动中，检索以下值：)

Bundle extras = getIntent().getExtras();
if (extras != null) {
    String value = extras.getString("key");
    //The key argument here must match that used in the other activity
}

Use this technique to pass variables from one Activity to the other.

(使用此技术将变量从一个活动传递到另一个活动。)