android onResume
时间: 2024-06-01 07:12:33 浏览: 12
onResume() is an Android activity lifecycle method that gets called when the activity is resumed and becomes visible to the user. This happens when the activity is brought back to the foreground after being in the background or when the activity is first created.
In onResume(), you can perform actions that need to be done when the activity is visible, such as updating UI elements, refreshing data, registering broadcast receivers, and starting animations. It is also a good place to acquire resources that were released in onPause() method.
Some common use cases of onResume() method:
1. Updating UI elements: If you have UI elements that need to be updated when the activity is resumed, you can do so in onResume() method.
2. Refreshing data: If your activity displays data that could change while the activity is in the background, you can refresh the data in onResume() method.
3. Registering broadcast receivers: If your activity depends on a broadcast receiver, you can register it in onResume() method.
4. Starting animations: If your activity contains animations that were stopped in onPause() method, you can restart them in onResume() method.
Overall, onResume() is an important method in Android activity lifecycle that allows you to handle the state of the activity when it becomes visible to the user.
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