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?(如何在 Android 应用程序的活动之间传递数据?)

问题描述

我有一个场景，通过登录页面登录后，每个activity上都会有一个退出按钮.

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

点击 sign-out 时，我将传递已登录用户的 session id 以注销.谁能指导我如何使 session id 对所有 activities 可用?

On clicking sign-out, I will be passing the session id of the signed in user to sign-out. Can anyone guide me on how to keep session id available to all activities?

这种情况的任何替代方案

Any alternative to this case

推荐答案

最简单的方法是将会话 ID 传递给您用于启动的 Intent 中的注销活动活动:

The easiest way to do this would be to pass the session id to the signout activity in the Intent you're using to start the activity:

Intent intent = new Intent(getBaseContext(), SignoutActivity.class);
intent.putExtra("EXTRA_SESSION_ID", sessionId);
startActivity(intent);

在下一个活动中访问该意图:

Access that intent on next activity:

String sessionId = getIntent().getStringExtra("EXTRA_SESSION_ID");

Intents 的 docs 有更多信息(查看标题为附加"的部分).

The docs for Intents has more information (look at the section titled "Extras").

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