如何在Android上管理startActivityForResult？ - How to manage startActivityForResult on Android?

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问题：

In my activity, I'm calling a second activity from the main activity by startActivityForResult . 在我的活动中，我正在通过startActivityForResult从主活动中调用第二个活动。 In my second activity there are some methods that finish this activity (maybe without result), however, just one of them return a result. 在我的第二个活动中，有一些方法可以完成此活动（可能没有结果），但是只有其中一个返回结果。

For example, from the main activity I call a second one. 例如，从主要活动中，我叫第二个活动。 In this activity I'm checking some features of handset such as does it have a camera. 在本活动中，我将检查手机的某些功能，例如是否带有摄像头。 If it doesn't have then I'll close this activity. 如果没有，我将关闭此活动。 Also, during preparation of MediaRecorder or MediaPlayer if a problem happens then I'll close this activity. 另外，在准备MediaRecorder或MediaPlayer如果发生问题，那么我将关闭此活动。

If its device has a camera and recording is done completely, then after recording a video if a user clicks on the done button then I'll send the result (address of the recorded video) back to main activity. 如果其设备带有摄像头并且录制已完全完成，则在录制视频后，如果用户单击“完成”按钮，我会将结果（录制的视频的地址）发送回主要活动。

How do I check the result from the main activity? 如何检查主要活动的结果？

解决方案：