Performance tips for PendingIntent in Android?

PendingIntent is a powerful feature in Android that allows your application to execute code at a later time, often used in conjunction with notification and alarms. However, improper use can lead to performance bottlenecks. Here are some tips to improve the performance when using PendingIntent in your Android applications:

  • Use Intent.FLAG_IMMUTABLE: Starting from Android 12, always use the FLAG_IMMUTABLE flag when creating PendingIntents to allow the system to optimize them.
  • Minimize Creation: Avoid creating new PendingIntent instances unnecessarily. Reuse existing instances whenever possible.
  • Use Proper Intent Actions: Make sure to define clear action strings in your intents to prevent ambiguity and improve performance.
  • Lifecycle Awareness: Be mindful of the application's lifecycle to avoid leaking PendingIntents when your application is in the background.
  • Clear PendingIntents When Not Needed: If you have pending tasks or intents that are no longer needed, be sure to cancel them to free up resources.

Here is a simple example of how to create a PendingIntent:

// Create an explicit intent Intent intent = new Intent(context, MyReceiver.class); intent.setAction("com.example.ACTION"); // Create a PendingIntent with FLAG_IMMUTABLE PendingIntent pendingIntent = PendingIntent.getBroadcast( context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE );

android performance PendingIntent optimization FLAG_IMMUTABLE Intent application lifecycle code example

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