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Android Application Development Tutorial - 49 - StartActivityForResult setup Video Lecture | Android Application Development (Mobile App) - Software Development

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FAQs on Android Application Development Tutorial - 49 - StartActivityForResult setup Video Lecture - Android Application Development (Mobile App) - Software Development

1. What is the purpose of using startActivityForResult in Android application development?
Ans. The purpose of using startActivityForResult in Android application development is to start a new activity and receive a result back from it. This is particularly useful when you want to perform an action in one activity and get the result in another activity.
2. How do you setup startActivityForResult in an Android application?
Ans. To setup startActivityForResult in an Android application, you need to use the startActivityForResult method and pass the intent of the activity you want to start as a parameter. You also need to override the onActivityResult method in the calling activity to receive the result from the started activity.
3. Can you explain the concept of requestCode and resultCode in startActivityForResult?
Ans. In startActivityForResult, requestCode is an integer value that identifies the request. It is used to differentiate between multiple requests if you are starting multiple activities. resultCode is an integer value that represents the result of the activity. It can be used to determine if the requested action was successful or not.
4. How can you pass data from the calling activity to the started activity using startActivityForResult?
Ans. You can pass data from the calling activity to the started activity using the putExtra method of the intent. This allows you to attach additional data to the intent object and retrieve it in the started activity using the getIntent method.
5. How can you retrieve the result from the started activity in the calling activity using startActivityForResult?
Ans. To retrieve the result from the started activity in the calling activity, you need to override the onActivityResult method. In this method, you can check the requestCode and resultCode to ensure you are handling the correct result. You can then retrieve the result data using the getIntent method.
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