Android - startActivityForResult 立即触发 onActivityResult [英] Android - startActivityForResult immediately triggering onActivityResult

问题描述

我正在使用调用 startActivityForResult(intent, ACTIVITY_TYPE) 从我的应用程序中的主要 Activity 启动 Activity，并且它们都在工作，但只有一个.

I am launching activities from the main activity in my app using the call startActivityForResult(intent, ACTIVITY_TYPE), and they are all working but one.

调用此函数时，会根据需要启动活动，但在日志中我可以看到 onActivityResult() 立即被触发.活动出现但 RESULT_CANCELED 立即返回到 onActivityResult().

This one, when called, launches the activity as desired, but in the log I can see that onActivityResult() is immediately being triggered. The activity shows up but RESULT_CANCELED is immediately returned to onActivityResult().

然后我与 Activity 交互，按下一个调用 finish() 的按钮，这次没有调用 onActivityResult()(因为显然结果已经返回).

I then interact with the activity, press a button which calls finish(), and onActivityResult() is not called this time (because apparently a result has already been returned).

这对任何人都有意义吗?以前有人见过这种行为吗?

Does this make sense to anyone? Has anyone seen this behavior before?

推荐答案

如果您的 Activity 作为 singleInstance 或 启动，则不能使用 startActivityForResult()代码>单个任务.standard 或 singleTop 启动模式将解决问题.

You can't use startActivityForResult() if your activity is being launched as a singleInstance or singleTask. standard or singleTop launch mode will fix the problem.

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