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Android Application Development Tutorial - 39 - Starting an Activity for a Result Video Lecture | Android Application Development (Mobile App) - Software Development

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FAQs on Android Application Development Tutorial - 39 - Starting an Activity for a Result Video Lecture - Android Application Development (Mobile App) - Software Development

1. What is the purpose of starting an activity for a result in Android application development?
Ans. Starting an activity for a result allows the developer to launch a new activity and expect a result back from that activity. This is useful when the developer wants to obtain some data or perform an action in the new activity and get the result back to the calling activity.
2. How can an activity be started for a result in Android application development?
Ans. To start an activity for a result, the developer can use the startActivityForResult() method instead of the regular startActivity() method. This method takes an intent as a parameter and also an integer request code that helps identify which activity's result is being received when returning back to the calling activity.
3. How can the result be obtained from the started activity in Android application development?
Ans. After starting an activity for a result, the result can be obtained in the calling activity by implementing the onActivityResult() method. This method is called when the started activity finishes and returns a result. The result can be retrieved using the request code specified while starting the activity and the result code set in the started activity.
4. Can an activity return a result to multiple calling activities in Android application development?
Ans. Yes, an activity can return a result to multiple calling activities in Android application development. The onActivityResult() method in the calling activities will be called individually for each started activity, allowing the developer to handle the results separately based on the request code.
5. What are some common use cases for starting an activity for a result in Android application development?
Ans. Some common use cases for starting an activity for a result include capturing photos or videos using the device's camera, selecting files or images from the device's storage, and getting user input or preferences from a settings activity. This mechanism allows the developer to interact with other activities and obtain necessary data or actions for the app's functionality.
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