使用绑定服务的自定义适配器-何时取消绑定? [英] Custom adapter using bound service - when to unbind?

问题描述

将数据馈送到ListView的设置:自定义适配器.数据基于外部服务计算的一些数字.我正在使用AIDL绑定服务并获取所需的数据.

The setup: custom adapter that feeds data into ListView. Data is based on some numbers calculated by external service. I am using AIDL to bind the service and get the data I need.

问题:如何知道何时取消服务绑定?连接是适配器本身专用的，并且检测到整个应用程序正在关闭的唯一方法是覆盖unregisterDataSetObserver.或者至少我没有找到其他方法，并且该方法与使用内容提供者+内容观察器的同一适配器一起使用时效果很好.不过不适用于AIDL-我收到了ServiceConnectionLeaked错误.

Problem: How do I know when to unbind the service? Connection is private to adapter itself and the only way to detect that whole application is shutting down is overriding unregisterDataSetObserver. Or at least I didn't find another way and this one worked well with same adapter using content provider+content observer. Does not work with AIDL though - I'm getting the ServiceConnectionLeaked error.

我知道我可以在适配器中添加一个"unbindFromService"方法，并从我的活动的onDestroy()中调用它，但这对我来说还不够优雅.如果可能的话，我更喜欢一些诚实"的触发器.

I know I can add a "unbindFromService" method to my adapter and call it from onDestroy() of my activity but that isn't elegant enough for me. I'd prefer some "honest" trigger if possible.

推荐答案

在CustomAdapter中实现ActivityLifecycleCallbacks，然后从您的活动调用中实现

Implement ActivityLifecycleCallbacks in your CustomAdapter and then from your activity call

mAdapter.setActivity(this);

适配器类

public class CustomAdapter  extends ArrayAdapter<String> implements ActivityLifecycleCallbacks{

    Activity mActivity;

    public void setActivity(Activity activity) {
           /* or you could remove setactivity and do below operation in Constructor */
        mActivity = activity;
        mActivity.getApplication().registerActivityLifecycleCallbacks(this);
    }

    @Override
    public void onActivityDestroyed(Activity activity) {
        /*unregister so that you do not get callbacks after activity is destroyed*/
        if(activity instanceof MainActivity)   
              mActivity.getApplication().unregisterActivityLifecycleCallbacks(this);

            /*unregister your activity or in any other callbacks*/
    }

    /* skipped other dummy functions*/

}

这篇关于使用绑定服务的自定义适配器-何时取消绑定?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！