Android - Catching onPause without being the active Activity

Question

Is there any way to catch onPause() in a java class that is Not an activity? I have native code with a Java-helper class that is used in other apps, and whenever those apps enters background I want to prepare for it too. How can I solve this? Is it enough to have my Java class extend some class to get the onPause(), even though its not registered as an activity in manifest etc?

Answer 1

Today we can use registerActivityLifecycleCallbacks() of the Application class and provide onActivityPaused().

Example:

AppContext.registerActivityLifecycleCallbacks(new Application.ActivityLifecycleCallbacks() {
  @Override  
  public void onActivityPaused(Activity activity) {
    //handle here
  }
}

Answer 2

创建一个名为的公共方法onPause()或prepare()或whateverSuitYou()在助手类，并从调用它onPause()你的Activity 。