返回值从AsyncTask的无get（）方法 [英] Return value from AsyncTask without get() method

问题描述

我想从我的DoInBackground AsyncTask的返回值，而是调用get（）方法冻结我的用户界面。我怎样才能重新写我的code到回调方法？

I'm trying to return value from my asynctask in DoInBackground, but calling get() method freezes my UI. How can I re-write my code to a callback method? :

public class GetUrlDataTask extends AsyncTask<String, Integer, String> {
String response;
HttpUtils util;
@Override
protected String doInBackground(String... params) {
    try {
        util = new HttpUtils(params[0]);
        response = util.getContent();
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return response;
}

@Override
protected void onPostExecute(String result) {
    super.onPostExecute(result);
}

在我的活动我得到的结果为响应=新GetUrlDataTask（）执行（简称网站）获得;

In my activity I get result as response = new GetUrlDataTask().execute("site").get;

推荐答案

[更新]现在，我建议使用注解。使用注释你可以注入的意见，使功能上，只需几个字母编译步骤asyncronous过程。看看在GitHub上butterknife库。

[UPDATE] Now i suggest to use annotations. With annotations you can inject views, make function as asyncronous process on the compilation step with just a few letters. Check out butterknife library on github.

ButterKnife

您可以创建界面，它传递给AsyncTask的（在构造函数），然后调用onPostExecute方法

You can create interface, pass it to AsyncTask (in constructor), and then call method in onPostExecute

例如：

您接口：

public interface OnTaskCompleted{
    void onTaskCompleted();
}

您活动：

public YourActivity implements OnTaskCompleted{
    //your Activity
}

和你的AsyncTask：

And your AsyncTask:

public YourTask extends AsyncTask<Object,Object,Object>{ //change Object to required type
    private OnTaskCompleted listener;

    public YourTask(OnTaskCompleted listener){
        this.listener=listener;
    }

    //required methods

    protected void onPostExecute(Object o){
        //your stuff
        listener.onTaskCompleted();
    }
}

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