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// Sets up a SwipeRefreshLayout.OnRefreshListener that invokes when
// the user performs a swipe-to-refresh gesture.

mySwipeRefreshLayout.setOnRefreshListener {
    Log.i(LOG_TAG, "onRefresh called from SwipeRefreshLayout")

    // This method performs the actual data-refresh operation and calls
    // setRefreshing(false) when it finishes.
    myUpdateOperation()
}

// Sets up a SwipeRefreshLayout.OnRefreshListener that is invoked when
// the user performs a swipe-to-refresh gesture.

mySwipeRefreshLayout.setOnRefreshListener(() -> {
    Log.i(LOG_TAG, "onRefresh called from SwipeRefreshLayout");

    // This method performs the actual data-refresh operation and calls
    // setRefreshing(false) when it finishes.
    myUpdateOperation();
  }
);

// Listen for option item selections to receive a notification when the user
// requests a refresh by selecting the refresh action bar item.

override fun onOptionsItemSelected(item: MenuItem): Boolean {
    when (item.itemId) {

        // Check whether the user triggers a refresh:
        R.id.menu_refresh -> {
            Log.i(LOG_TAG, "Refresh menu item selected")

            // Signal SwipeRefreshLayout to start the progress indicator.
            mySwipeRefreshLayout.isRefreshing = true

            // Start the refresh background task. This method calls
            // setRefreshing(false) when it finishes.
            myUpdateOperation()

            return true
        }
    }

    // User doesn't trigger a refresh. Let the superclass handle this action.
    return super.onOptionsItemSelected(item)
}

// Listen for option item selections to receive a notification when the user
// requests a refresh by selecting the refresh action bar item.

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {

        // Check whether the user triggers a refresh:
        case R.id.menu_refresh:
            Log.i(LOG_TAG, "Refresh menu item selected");

            // Signal SwipeRefreshLayout to start the progress indicator.
            mySwipeRefreshLayout.setRefreshing(true);

            // Start the refresh background task. This method calls
            // setRefreshing(false) when it finishes.
            myUpdateOperation();

            return true;
    }

    // User doesn't trigger a refresh. Let the superclass handle this action.
    return super.onOptionsItemSelected(item);
}