Скачать или смотреть How to Fix Skipped 44 Frames! Error in Your Android SQLite App

Learn how to resolve the `Skipped 44 frames!` error by optimizing your Android app to handle database operations more efficiently. Discover best practices to enhance performance and user experience.
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This video is based on the question https://stackoverflow.com/q/63429687/ asked by the user 'mina mo' ( https://stackoverflow.com/u/12888600/ ) and on the answer https://stackoverflow.com/a/63429929/ provided by the user 'Nico Feulner' ( https://stackoverflow.com/u/6771085/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Resolving the Skipped 44 Frames! Error in Android Development

As an Android developer, you might have encountered the frustrating message, Skipped 44 frames! The application may be doing too much work on its main thread. This warning usually indicates that your application is overloaded on its main thread, often leading to a sluggish user interface (UI) and a poor user experience. In this post, we’ll explore a specific scenario involving an Android book application built with Java and SQLite that could lead to this warning and discuss how to efficiently address this problem.

Understanding the Problem

When developing an application that displays content from a database, such as a book app, it's crucial to ensure that your UI remains responsive. If too many tasks are performed on the main thread — like querying a database or loading large objects — the app will exhibit noticeable delays or unresponsiveness.

In our scenario, while attempting to populate a ListView with data from an SQLite database, the developer faced an issue where the database opened successfully, but the ListView was empty, and they received a warning about skipping frames. This could be attributed to how the data is being handled and rendered in the app.

The Solution: Steps to Fix the Issue

To address the skipped frames error, we need to ensure that the database operations do not overload the main thread. Below are the steps to rectify the code and provide a better experience for users.

1. Setting Up the Adapter

You need to associate the data retrieved from the database with your ListView. This is done by creating an adapter. Here’s how you can do it:

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Replace YOUR_ADAPTER with an instance of your adapter, which should be set up to use the list of seasons retrieved from the database.

Example of Adapter Initialization

Here is a simple way to set up an ArrayAdapter and bind it to the ListView:

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2. Moving Database Calls to a Background Thread

To prevent blocking the UI, it's essential to perform database operations on a separate thread. You can achieve this using an AsyncTask or any background threading model (for instance, Kotlin coroutines if using Kotlin). Here’s a basic demonstration with AsyncTask:

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3. Communicating with the Main Thread

Since only the main thread can modify the UI, you should use the runOnUiThread() method if necessary when you want to update UI elements based on the results from a parallel thread.

4. Conclusion

By implementing the above strategies, not only will you eliminate the warning about skipping frames, but you'll also create a smooth and responsive user experience for your app. It’s essential to remember the following best practices when working with Android UIs:

Always perform heavy work on a background thread.

Use adapters to connect your data source to UI components.

Ensure any changes to the UI are done on the main thread.

By carefully managing how and when you handle database operations, your application will not only run more smoothly but also provide a better experience for your users.

Happy coding!