Android Weak Handler


Source link: https://github.com/badoo/android-weak-handler

Android Weak Handler

Memory safer implementation of android.os.Handler

Problem

Original implementation of Handler always keeps hard reference to handler in queue of execution. Any object in Message or Runnable posted to android.os.Handler will be hard referenced for some time. If you create anonymous Runnable and call to postDelayed with large timeout, that Runnable will be held in memory until timeout passes. Even if your Runnable seems small, it indirectly references owner class, which is usually something as big as Activity or Fragment.

You can read more on our blog post.

Solution

WeakHandler is trickier then android.os.Handler , it will keep WeakReferences to runnables and messages, and GC could collect them once WeakHandler instance is not referenced any more.

Usage

Add reference to your build.gradle:

repositories {

  maven {

repositories {

 url 'https://oss.sonatype.org/content/repositories/releases/'

}

  
}
 
}
  dependencies {

  compile 'com.badoo.mobile:android-weak-handler:1.1' 
}

Use WeakHandler as you normally would use Handler

import com.badoo.mobile.util.WeakHandler;  public class ExampleActivity extends Activity {

private WeakHandler mHandler; // We still need at least one hard reference to WeakHandler

 protected void onCreate(Bundle savedInstanceState) {

mHandler = new WeakHandler();

...
  
}

 private void onClick(View view) {

mHandler.postDelayed(new Runnable() {

 view.setVisibility(View.INVISIBLE);

}
, 5000);

  
}
 
}

Credits

Weak Handler is brought to you by Badoo Trading Limited and it is released under the MIT License.

Created by Dmytro Voronkevych

##Blog Read more on our tech blog or explore our other open source projects

Resources

Gradle Script Kotlin provides support for writing Gradle build scripts using JetBrains' Kotlin language. It aims to provide Gradle users with a rich, flexible and statically-typed approach to developing build logic in conjunction with the best IDE and tooling experience possible.

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  • Ride Request Button
  • Ride Request Widget
  • REST APIs

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Android library to make notes drop, visualization for music players.

Exception handling is always a cumbersome but unavoidable part of dealing with disk cache on Android. Complex error handling not only makes your code hard to understand, but also prone to developer errors. IgDiskCache is a fault-tolerant Android disk cache library that helps simplify the error handling logic and makes your file caching code cleaner and much easier to maintain.

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