**Translation:**
`Could not execute JDBC batch update`
I am using a `ListView` to display some information, which includes images and text. The text is downloaded using an asynchronous task, and the images are also downloaded in an asynchronous task within the adapter. However, sometimes the images and information do not match, and when I scroll the `ListView`, the already downloaded images still change. Additionally, I encountered the exception `javax.microedition.rms.InvalidRecordIDException`. I want the already downloaded images to remain unchanged. How should I handle this?
Ah, u ------ **Solution** --------------------------------------------------------
You can refer to: Android image loading solutions
http://www.myexception.cn/android/180529.html
Relevant articles on this topic:
- `org.springframework.jdbc.UncategorizedSQLException`
- Questions regarding creating new users in Oracle databases
- Django linking to MySQL for similar image retrieval in Python
---
**Explanation of the Problem and Solution:**
The issue described involves inconsistent behavior when loading images into a `ListView`. Specifically:
1. Images and text sometimes mismatch.
2. Scrolling the `ListView` causes already downloaded images to change.
This problem typically arises due to the recycling mechanism of `ListView`. When rows are recycled, the old data (e.g., images) may be reused before the correct data is loaded, leading to mismatches or changes during scrolling.
### **Possible Solutions:**
1. **Use a Caching Mechanism:**
Implement an image caching system to store downloaded images. Libraries like **Glide**, **Picasso**, or **Fresco** provide built-in caching and efficient image loading mechanisms. These libraries ensure that once an image is downloaded, it remains consistent even when the `ListView` is scrolled.
2. **ViewHolder Pattern:**
Use the ViewHolder pattern in your adapter to improve performance and avoid reinitializing views unnecessarily. This reduces the likelihood of mismatches caused by view recycling.
3. **Cancel Pending Tasks:**
In the adapter, ensure that any pending image download tasks for recycled views are canceled before starting new ones. This prevents outdated images from being displayed temporarily.
4. **Check URLs Before Loading:**
Always verify that the URL for the image matches the current item's URL before loading it into the view. This ensures consistency between the data and the displayed image.
5. **Handle Exceptions Properly:**
For exceptions like `javax.microedition.rms.InvalidRecordIDException`, ensure that your database operations are robust and handle invalid record IDs gracefully.
By following these practices, you can ensure that the images in your `ListView` remain consistent and do not change unexpectedly during scrolling. Additionally, leveraging well-established libraries like Glide or Picasso will simplify the implementation and improve performance.