如何在不打开应用程序的情况下使ContentObserver工作？ [英] How to make ContentObserver work without having application opened?

问题描述

我需要让我的应用程序侦听Android中通讯录中的更改。我已经读到可以使用 ContentObserver 并监听 ContactsContract.Contacts 中的更改来完成。似乎当应用程序关闭时ContentObserver的生命周期就结束了。

I need to have my application listen for changes in addressbook in Android. I have read that it can be done using ContentObserver and listening for changes in ContactsContract.Contacts. It seems the lifecycle of the ContentObserver ends when the application is closed.

即使未打开应用程序，如何使ContentObserver正常工作？

How do I make the ContentObserver work even if the application wasn't opened?

推荐答案

在OnStartCommand中用返回START_STICKY; 来注册内容观察者在onCreate中注册它。

register your Content Observer in the OnStartCommand with return START_STICKY; instead of registering it in the onCreate. It works for me.

@Override  
public int onStartCommand(Intent intent, int flags, int startId) {  
    getContentResolver().registerContentObserver(uri,true, new SMSObserver(new Handler(), getBaseContext())); 
    return START_STICKY;    
} 

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