The onResume method is a callback method in the Android Activity class that is called every time the activity is resumed from a paused state. This method is responsible for initializing or resuming any resources or components that were paused or stopped during the activity's lifecycle.
Some examples of tasks that can be performed in the onResume method include:
- Checking for and requesting any needed permissions - Starting or resuming animations or media playback - Restoring activity state or user input - Fetching data from APIs or APIs - Updating UI elements
Here are some code examples using the onResume method in Android activity:
Example 1:
@Override protected void onResume() { super.onResume(); // Check for and request needed permissions if (ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this, new String[] { Manifest.permission.WRITE_EXTERNAL_STORAGE }, 1); } }
Example 2:
@Override protected void onResume() { super.onResume(); // Fetch data from API MyAPIService service = retrofit.create(MyAPIService.class); Call call = service.getData(); call.enqueue(new Callback() { @Override public void onResponse(Call call, Response response) { // Do something with response data }
@Override public void onFailure(Call call, Throwable t) { // Handle API errors } }); }
In these examples, we can see that the package libraries being used include:
- android.support.v4.app.ActivityCompat: This package is used to request permissions in Android. - retrofit2.Retrofit: This package is used for making network requests to APIs. - retrofit2.Call: This package is used for handling API responses.
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