How to refresh data in RecyclerView in Android?

1 year ago
William Carter
1 minute

To refresh the data in the RecyclerView, you can use the following method:

  1. Update the dataset: Start by updating the data set of the RecyclerView, for example by modifying the content of the data set or setting a new data set.
  2. Invoke the notifyDataSetChanged() method of the Adapter: Call the notifyDataSetChanged() method of the RecyclerView’s Adapter to notify that the data has been changed and needs to be refreshed.
  3. Call the Adapter’s notifyItemInserted(), notifyItemRemoved() methods: Invoke the corresponding notification method of the adapter based on the specific operation (insertion, deletion, updating, etc.) to inform the RecyclerView that changes have occurred.
  4. Call the notifyItemChanged() method of the Adapter: If only a single item needs to be updated, you can use notifyItemChanged() to notify the RecyclerView to update the specified position of the item.

Sample code:

// 更新数据集
List<Data> newData = new ArrayList<>();
// 添加数据到newData

// 更新RecyclerView的数据集
adapter.setData(newData);

// 调用Adapter的notifyDataSetChanged()方法刷新数据
adapter.notifyDataSetChanged();

The adapter in the above code is the Adapter for a RecyclerView. The setData() method is used to set a new dataset, and the notifyDataSetChanged() method is used to notify the adapter that the data has changed and the RecyclerView needs to be refreshed.

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